JP2002118036A - Electricity storage electronic component and composite electrode body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electricity storage electronic part which keeps a large amount of electricity like a cell and is superior in output characteristics such as an electric double-layer capacitor. SOLUTION: An electricity storage electronic component 1" is provided with an electric double-layer capacitor anode material D+ and an electric double- layer capacitor cathode material D-, which are arranged to confront each other. An inner element 2" is equipped with a lithium ion cell anode material L+ and a lithium ion cell cathode material L- which are arranged to confront each other and furthermore impregnated with electrolyte containing lithium ions. A composite electrode 11 with the electric double-layer capacitor anode material D+ formed on its one surface and the lithium ion cell anode material L+ formed on its other surface, and a composite electrode 12 with the electric double-layer capacitor cathode material D-, formed on its one surface and the lithium ion cell cathode material L- formed on its other surface, are user in the inner element 2".

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel storage battery which has the advantages of an electric double layer capacitor and a lithium ion secondary battery, and compensates for the disadvantages of the electric double layer capacitor and a lithium ion secondary battery. The present invention relates to an electronic component for electronic devices and a composite electrode body usable for the electronic component for power storage.

[0002]

2. Description of the Related Art In general, an electric double layer capacitor is a capacitor using an electric double layer formed at an interface between a carbon electrode such as activated carbon and an electrolytic solution, and has a large capacitance in the farad order. For this reason, it has attracted attention as a memory backup for integrated circuits and a regenerative energy device for electric vehicles and hybrid vehicles.

[0003] Lithium ion secondary batteries are widely used as batteries for mobile phones and personal computers, and their application to electric vehicles, hybrid vehicles, and the like is being studied.

In both the electric double layer capacitor and the lithium ion secondary battery, as an electrode body, a material obtained by kneading a current-collecting active material powder together with a conductive material powder and a binder is applied to a metal foil such as an aluminum foil or a copper foil. , Dried and pressed.

For example, in an electric double layer capacitor, for both the anode and the cathode, activated carbon powder is kneaded with a conductive material powder such as acetylene black or a binder such as polyvinylidene fluorite (hereinafter referred to as PVDF) using a solvent. After applying to the aluminum foil,
Dry and pressed ones are used.

In a lithium ion secondary battery, an anode active material such as lithium cobalt oxide is kneaded as an anode with a conductive material such as acetylene black or a binder such as PVDF using a solvent to form a metal foil such as an aluminum foil. After application, dried and pressed are used. On the other hand, in a lithium ion secondary battery, as a cathode, a cathode active material such as carbon black or coke or graphite is kneaded with a solvent such as PVDF and a binder, applied to a metal foil such as aluminum, and then dried and pressed. What was used is used.

As described above, the electric double layer capacitor and the lithium ion secondary battery have very similar electrode structures and manufacturing methods.

[0008]

The electric double layer capacitor has good output characteristics, but has a problem that the electric capacity is overwhelmingly smaller than that of the lithium ion secondary battery.
In order to solve such problems, improvements have been made mainly by examining materials such as activated carbon. However, at present, sufficient results have not been obtained.

On the other hand, the lithium ion secondary battery has a much larger electric capacity than the electric double layer capacitor, but has a problem that the output characteristics are considerably poor. In order to solve such problems, various studies have been made on a method of taking out an electrolytic solution and an electrode lead. However, at present, sufficient results have not yet been obtained.

[0010] In view of the above, a power storage device in which a circuit is formed by combining a lithium ion secondary battery and an electric double layer capacitor has been studied. Is not obtained.

In view of the above problems, an object of the present invention is to
A lithium-ion secondary battery and an electric double-layer capacitor complement each other's drawbacks, so that they have a high amount of electricity like batteries and have excellent output characteristics like electric double-layer capacitors. To provide parts.

[0012]

Means for Solving the Problems In order to solve the above-mentioned problems, the present inventor has conducted various studies, and has repeatedly conducted various experiments. As a result, the inventors focused on the electrode portions of the lithium ion secondary battery and the electric double layer capacitor. However, they have found that the above problem can be solved if the electrode portion has both functions.

That is, in the electronic component for power storage according to the present invention, the anode material for the electric double layer capacitor and the cathode material for the electric double layer capacitor face each other, and the cathode material for the lithium ion battery and the anode material for the lithium ion secondary battery are Are impregnated with an electrolytic solution containing lithium ions in the internal element configured to face each other. In the internal element, the anode material for the electric double layer capacitor and the anode material for the lithium ion battery are on one side and the other side. And at least one of a composite cathode body in which the electric double layer capacitor cathode material and the lithium ion battery cathode material are formed on one side and the other side, respectively. Wherein the composite electrode body is used.

In the electronic component for power storage according to the present invention, since the electric double layer capacitor and the lithium ion secondary battery are formed in one electronic component, both the lithium ion secondary battery and the electric double layer capacitor are used. The disadvantages complement each other. Therefore, it has a large amount of electricity like a battery and has excellent output characteristics like an electric double layer capacitor.
Also, on the anode side or the cathode side, the number of electrode bodies can be reduced because the electric double layer capacitor and the lithium ion battery are integrally formed.

In the present invention, for example, when the composite anode body is used among the composite anode body and the composite cathode body in the internal element, the anode material for the electric double layer capacitor is formed in the composite anode body. The cathode material for the electric double layer capacitor is disposed on the side on which the anode material for the lithium ion battery is formed on the side on which the anode material for the lithium ion battery is formed with the separator on the side on which the anode material for the lithium ion battery is formed via the separator. The cathode material for the electric double layer capacitor is disposed to face the cathode material.

According to the present invention, in the internal element,
In the case where the composite cathode body is used among the composite anode body and the composite cathode body, the electric power is applied to a surface of the composite cathode body on which the electric double layer capacitor cathode material is formed via a separator. The anode material for a double-layer capacitor is disposed to face the anode material for the electric double-layer capacitor via a separator on the surface of the composite cathode body on which the cathode material for a lithium ion battery is formed. Good.

Further, in the present invention, when both the composite anode body and the composite cathode body are used in the internal element, the anode material for the electric double layer capacitor and the cathode material for the electric double layer form a separator. The composite anode body and the composite cathode body are arranged so that the anode material for a lithium ion battery and the cathode material for the lithium ion battery face each other with a separator interposed therebetween.

In the present invention, as the composite anode body, for example, an electrode material containing at least activated carbon, carbon, and a binder is formed on one surface of a metal foil, and at least a lithium-based material is formed on the other surface of the metal foil. Compound,
A composite electrode body on which an electrode material containing carbon and a binder is formed can be used.

In the composite cathode body, for example, an electrode material containing at least activated carbon, carbon, and a binder is formed on one side of a metal foil, and carbon black, coke, and the like are formed on the other side of the metal foil. A composite electrode body in which an electrode material containing at least one of graphite together with a binder is formed can be used.

[0020]

Embodiments of the present invention will be described with reference to the drawings.

[Embodiment 1] FIGS. 1A and 1B
(C) is an explanatory view showing the configuration of the internal element of the electronic component for power storage according to Embodiment 1 of the present invention, an equivalent circuit diagram of the electronic component for electrical storage having a three-terminal structure using this internal element, and FIG. It is an equivalent circuit diagram of the electronic component for electric storage of the two-terminal structure using an internal element.

In FIG. 1A, in the electronic component 1 for power storage according to the present embodiment, an anode material D + for an electric double layer capacitor and a cathode material D− for an electric double layer capacitor are contained in one case (not shown). Are opposed to each other, and the internal element 2 configured so that the anode material L + for the lithium ion battery and the cathode material L− for the lithium ion battery face each other is impregnated with an electrolyte solution containing lithium ions.

In this embodiment, the internal element 2 has a composite anode body 11 in which an anode material D + for an electric double layer capacitor and an anode material L + for a lithium ion battery are integrally formed on one side and the other side, respectively. Used. In the internal element 2, a cathode body 15 for an electric double layer capacitor is opposed to a surface of the composite anode body 11 on which the anode material D + for an electric double layer capacitor is formed via a separator S. Cathode material D- for electric double layer capacitors is formed on both surfaces of cathode body 15 for double layer capacitors. A cathode 16 for a lithium-ion battery is opposed to a surface of the composite anode 11 on which the anode material L + for a lithium-ion battery is formed via a separator S. On both sides,
A cathode material L- for a lithium ion battery is formed.

Here, in the composite anode body 11, an anode material D + (electrode material) for an electric double layer capacitor including at least activated carbon, carbon, and a binder is formed on one side of the anode metal foil 110 serving as a base. Metal foil for anode 11
0, the anode material L for a lithium ion battery containing at least a lithium compound, carbon, and a binder.
+ (Electrode material) is formed. In the electric double layer capacitor cathode body 15, a cathode material D- (electrode material) for an electric double layer capacitor containing activated carbon, carbon, and a binder is formed on both surfaces of a metal foil for a cathode 150 serving as a base. In the lithium ion battery cathode body 16, a lithium ion battery cathode material L− (electrode material) containing at least one of carbon black, coke, and graphite together with a binder is formed on both surfaces of the cathode metal foil 160 serving as a base. Have been.

Such an element structure includes a cathode body 16 for a lithium ion battery, a separator S, a composite anode body 11, a separator S, a cathode body 15 for an electric double layer capacitor, a separator S, a composite anode body 11, and a separator S. It can be constructed by laminating or winding as a set.

As described above, in the electronic component for power storage 1 of the present embodiment, the anode element D for the electric double layer capacitor is used in the internal element 2 impregnated with the electrolyte containing lithium ions.
+ And cathode material D- for electric double layer capacitor are separator S
To form an electric double layer capacitor, and the lithium ion battery cathode material L− and the lithium ion battery anode material L + face each other via the separator S to form a lithium ion secondary battery. Figure 1
As shown in (B) and (C), each electronic component has both a function as an electric double layer capacitor and a function as a lithium ion secondary battery.
Therefore, in the electronic component for power storage 1 of the present embodiment, since the lithium ion secondary battery and the electric double layer capacitor complement each other, the electronic component for electric storage 1 of the present embodiment has a good electric double layer capacitor. It has output characteristics and a large electric capacity of a lithium ion secondary battery.

In the electronic component 1 for power storage of the present embodiment, the composite anode body in which the anode material D + for the electric double layer capacitor and the anode material L + for the lithium ion battery are integrally formed on one side and the other side, respectively. Since 11 is used,
Even if one electronic component has both a function as an electric double layer capacitor and a function as a lithium ion secondary battery, there is no useless electrode surface. Therefore, the volume efficiency is high. In addition, since it can be constituted by three types of electrode bodies, the manufacturing process can be simplified.

In the electronic component for power storage 1 of the present embodiment, the internal element 2 includes the anode material D for an electric double layer capacitor.
+ And anode material L + for a lithium ion battery integrally formed on one side and the other side, respectively, in composite anode body 11
Is used, the anode is common, but as the cathode, a separate cathode body 15 for electric double layer capacitor and a cathode body 16 for lithium ion battery are used. Therefore, as shown in FIG. 1 (B), on the cathode side, each of the electric double layer capacitor cathode body 15 and the lithium ion battery cathode body 16 is connected to a separate external cathode terminal, and a three-terminal storage battery is provided. Electronic component 1 may be configured, or as shown in FIG. 1C, a cathode body 15 for an electric double layer capacitor and a cathode body 16 for a lithium ion battery.
May be connected to a common external cathode terminal to form a power storage electronic component 1 having a two-terminal structure.

[Embodiment 2] FIGS. 2A and 2B
(C) is an explanatory diagram showing a configuration of an internal element of the electronic component for power storage according to Embodiment 2 of the present invention, an equivalent circuit diagram of an electronic component for electrical storage having a three-terminal structure using this internal element, and FIG. It is an equivalent circuit diagram of the electronic component for electric storage of the two-terminal structure using an internal element.

Referring to FIG. 2A, in the electronic component for power storage 1 'according to the present embodiment, similarly to the first embodiment, the anode material D + for the electric double layer capacitor and the cathode material D- for the electric double layer capacitor face each other. At the same time, an electrolyte containing lithium ions is impregnated in the internal element 2 ′ configured so that the anode material L + for the lithium ion battery and the cathode material L− for the lithium ion battery face each other.

In this embodiment, the internal element 2 'has a composite cathode in which a cathode material D- for an electric double layer capacitor and a cathode material L- for a lithium ion battery are integrally formed on one and the other sides, respectively. Body 12 is used. Also,
A surface of the composite cathode body 12 on which the electric double layer capacitor cathode material D− is formed is opposed to an electric double layer capacitor anode body 13 with a separator S interposed therebetween. On both surfaces of D +, an anode material D + for an electric double layer capacitor is formed. On the other hand, on the surface of the composite cathode body 12 on which the cathode material L− for the lithium ion battery is formed, the anode body 14 for the lithium ion battery is opposed via the separator S. On both surfaces of anode body 14, anode material L + for a lithium ion battery is formed.

In the present embodiment, in the composite cathode body 12, a cathode material D- for an electric double layer capacitor containing at least activated carbon, carbon and a binder is formed on one side of a cathode metal foil 120 serving as a base. On the other surface side of the metal foil, a cathode material L- for a lithium ion battery including at least one of carbon black, coke, and graphite together with a binder is formed. In the anode body 13 for an electric double layer capacitor, the anode metal foil 13 serving as a base is used.
A positive electrode material D + for an electric double layer capacitor containing activated carbon, carbon, and a binder is formed on both surfaces of the positive electrode metal foil 140 serving as a base. And an anode material L + for a lithium ion battery containing a binder.

Such an element structure includes a set of an anode body 14 for a lithium ion battery, a separator S, a composite cathode body 12, a separator S, an anode 13 for an electric double layer capacitor, a separator S, a composite cathode body 12, and a separator S. Or by winding.

As described above, the electronic component for power storage 1 ′ of the present embodiment
However, as in the first embodiment, in the internal element 2 ′ impregnated with the electrolyte containing lithium ions, the anode material D + for the electric double layer capacitor and the cathode material D
− Constitutes an electric double layer capacitor with the separator S interposed therebetween, and the cathode material L− for the lithium ion battery and the anode material L + for the lithium ion battery opposed with the separator S interposed therebetween to form a lithium ion secondary capacitor. Since the battery is configured, as shown in FIG. 2 (B), it has both a function as an electric double layer capacitor and a function as a lithium ion secondary battery, though it is a single electronic component.
Accordingly, in the electronic component for power storage 1 ′ of the present embodiment, since the lithium ion secondary battery and the electric double layer capacitor complement each other, the electronic component for power storage 1 ′ of the present embodiment includes:
It has good output characteristics of an electric double layer capacitor and large electric capacity of a lithium ion secondary battery.

In the internal element 2 ', the cathode material D- for the electric double layer capacitor and the cathode material L- for the lithium ion battery are used.
And a composite cathode body 12 integrally formed on one side and the other side, respectively, so that one electronic component functions as an electric double-layer capacitor and as a lithium ion secondary battery. Even if both functions are provided, there is no useless electrode surface. Therefore, the volume efficiency is high. In addition, since it can be constituted by three types of electrode bodies, the manufacturing process can be simplified.

In the electric storage electronic component 1 'of this embodiment, the internal element 2' includes a cathode material D- for an electric double layer capacitor and a cathode material L- for a lithium ion battery on one side and the other side. Cathode body 1 formed integrally with each other
2 is used, the cathode is common, but as the anode, separate anode 13 for electric double layer capacitor and anode 14 for lithium ion battery are used respectively. Therefore, as shown in FIG. 2B, on the anode side, each of the electric double layer capacitor anode body 13 and the lithium ion battery anode body 14 is connected to a separate external anode terminal to store electricity in a three-terminal structure. The electronic component 1 ′ may be formed, or as shown in FIG. 2C, the anode 13 for the electric double layer capacitor and the anode 14 for the lithium ion battery are connected to a common external anode terminal. A power storage electronic component 1 'having a terminal structure may be configured.

[Embodiment 3] FIGS. 3A and 3B are explanatory views showing the structure of an internal element of a power storage electronic component according to Embodiment 3 of the present invention, and FIGS. FIG. 2 is an equivalent circuit diagram of the power storage electronic component 1 having a two-terminal structure.

Referring to FIG. 3A, in the electronic component for power storage 1 ″ according to the present embodiment, similarly to the first and second embodiments, the anode material D + for the electric double layer capacitor and the cathode material D− for the electric double layer capacitor are formed. The internal element 2 ″ configured so as to face the anode material L + for a lithium ion battery and the cathode material L− for a lithium ion battery is impregnated with an electrolyte solution containing lithium ions.

In this embodiment, the internal element 2 ″ has a composite anode body 11 in which an anode material D + for an electric double layer capacitor and an anode material L + for a lithium ion battery are integrally formed on one side and the other side, respectively. Is used.
In the internal element 2 ″, the cathode material D-
And a negative electrode material L- for a lithium ion battery are integrally formed on one side and the other side, respectively.

Here, in the composite anode body 11, at least one of activated carbon, carbon,
An anode material D + for an electric double layer capacitor containing a binder is formed, and an anode material L + for a lithium ion battery containing at least a lithium-based compound, carbon, and a binder is formed on the other surface of the metal foil for an anode. In the composite cathode body 12, a cathode material D- for an electric double layer capacitor containing at least activated carbon, carbon, and a binder is formed on one surface side of the metal foil 120 for the cathode. A cathode material L- for a lithium ion battery including at least one of black, coke, and graphite together with a binder is formed.

Such an element structure is composed of the composite anode body 11,
The separator S, the composite cathode body 12, and the separator S can be configured by stacking or winding as a set.

As described above, the electronic component for power storage 1 ″ of the present embodiment
However, as in Embodiments 1 and 2, in the internal element 2 ″ impregnated with the electrolyte solution containing lithium ions, the anode material D + for the electric double layer capacitor and the cathode material D− for the electric double layer capacitor are interposed with the separator S interposed therebetween. Cathode material L for a lithium-ion battery
− And the anode material L + for the lithium ion battery are the separator S
As shown in FIG. 3 (B), a lithium ion secondary battery is configured to face the battery via one of the electronic components. It has both functions as. Therefore, in the power storage electronic component 1 ″ of the present embodiment, the lithium ion secondary battery and the electric double layer capacitor complement each other's disadvantages, and thus the power storage electronic component 1 ″ of the present embodiment.
Has good output characteristics of an electric double layer capacitor and a large electric capacity of a lithium ion secondary battery.

In the electronic component for power storage 1 ″ of the present embodiment, the internal element 2 ″ has an anode material D + for an electric double layer capacitor and an anode material L + for a lithium ion battery on one side and the other side, respectively. Composite anode body 1 formed integrally
1 and a composite cathode body 12 in which a cathode material D− for an electric double layer capacitor and a cathode material L− for a lithium ion battery are integrally formed on one side and the other side, respectively. Even if one electronic component has both a function as an electric double layer capacitor and a function as a lithium ion secondary battery, there is no useless electrode surface. Therefore, the volume efficiency is high. In addition, since it can be composed of two types of electrode bodies, the manufacturing process can be simplified.

[Other Embodiments] The shape of the internal element 2 ″ is obtained by winding each electrode body together with the separator S in a cylindrical shape, and after winding each electrode body together with the separator S into a cylindrical shape. The electrode may be shaped into an ellipse or an ellipse by applying pressure, or may be formed by laminating each electrode body together with the separator S.

When the electrode material is applied and formed on the front side and the back side of the metal foil, the application area may be the same on the front side and the back side, or may be different. In the case of the composite anode body 11,
The anode material D + for the electric double layer capacitor is applied to one of the front side and the back side of the metal foil for the anode, and the anode material L + for the lithium ion battery is applied to the other side. By controlling the balance between the function as an electric double layer capacitor and the function as a lithium ion secondary battery, such as changing the ratio on the front and back,
The quantity of electricity and output characteristics may be optimized. Similarly, although not as much affected as the composite anode body 11 side, the composite cathode body 12
Also, the cathode material D- for the electric double layer capacitor is applied to one of the front side and the back side of the metal foil for the cathode, and the cathode material L- for the lithium ion battery is applied to the other side. Accordingly, the amount of electricity and output characteristics may be optimized by controlling the balance between the function as an electric double layer capacitor and the function as a lithium ion secondary battery by changing the application area ratio between front and back. In such a configuration, a portion where the metal foil is exposed occurs on the surface having the smaller application area, and this exposed portion may be used for connection of a lead or the like. Can be achieved.

[0046]

EXAMPLES Examples of the embodiments of the present invention will be described below.

As the metal foils 110, 130, and 140 for the anode, an aluminum foil having a purity of 99% and a thickness of 20 μm was used.
The resultant was subjected to electrolytic etching with a 60% alternating current solution using a 60% hydrochloric acid solution, sufficiently washed, and dried. (Etched aluminum foil) As the metal foils 120, 150, and 160 for the cathode, those corresponding to the electric double layer capacitor use the same etched aluminum foil as the metal foil for the anode, and are compatible with lithium ion secondary batteries. As a material to be used, basically, a copper foil having a thickness of 99% and a thickness of 20 μm was used.

Of the anode materials (active materials for the anode), the anode material D + for the electric double layer capacitor is activated carbon 70
Wt%, acetylene black · 10 wt%, PVDF (polyvinylidene fluorite) · 10 as a binder
% By weight and 10% by weight of toluene as a solvent were sufficiently kneaded using a mixer to prepare an anode active material for an electric double layer capacitor (referred to as active material A).

On the other hand, for the lithium ion battery anode material L +, lithium cobalt oxide
Acetylene black, 10% by weight, P as binder
VDF (polyvinylidene fluorite) 10% by weight,
Toluene 10% by weight as a solvent was sufficiently kneaded using a mixer to prepare an anode active material for a lithium ion battery (referred to as active material B).

Of the respective cathode materials (cathode active materials), the cathode material D− for the electric double layer capacitor was, similarly to the anode material D + for the electric double layer capacitor, 70% by weight of activated carbon and 10% by weight of acetylene black. , PV as binder
10% by weight of DF (polyvinylidene fluoride) and 10% by weight of toluene as a solvent were sufficiently kneaded using a mixer to prepare a cathode active material for an electric double layer capacitor (referred to as active material C).

As for the cathode material L- for lithium ion batteries, a mixture of carbon black and coke (1: 1 by weight) / 80% by weight, PVDF / 10 as a binder
% By weight and 10% by weight of toluene as a solvent were mixed and sufficiently kneaded with a mixer to prepare a cathode active material for a lithium ion battery (referred to as active material D).

The active materials A, B, C, and D prepared as described above are applied to each electrode foil, dried, pressed, and the like, and are subjected to the steps described in Embodiments 1, 2, and 3 (FIGS. 1, 2, and 3). Anode 13 for electric double layer capacitor, cathode 15 for electric double layer capacitor, anode 14 for lithium ion battery, cathode 16 for lithium ion battery, composite anode 11 and composite cathode 12 according to the present invention. After that, together with the separator S,
After being wound or laminated to form the internal elements 2, 2 ', 2 ", the internal elements 2, 2', 2" are impregnated with an electrolytic solution containing lithium ions. It was connected to an external terminal and housed and sealed in a case of the same size to produce the electronic components for power storage 1, 1 ′, 1 ″.

As the electrolyte containing lithium ions, a propylene carbonate solution of a lithium salt was used.

In Example 1 of the present invention (Embodiment 1 / see FIG. 1), metal foil 110 (etched aluminum foil)
The active material C is applied to both the front and back surfaces of the composite anode body 11 coated with the active materials A and B on the front surface and the back surface, respectively, and the metal foil 150 (etched aluminum foil) for the cathode of the electric double layer capacitor. A negative electrode body 15 for an electric double layer capacitor and a negative electrode body 16 for a lithium ion battery in which an active material D was applied to both the front and back surfaces of a metal foil (copper foil) for a cathode of a lithium ion battery were used.

In Example 2 of the present invention (Embodiment 2 / see FIG. 2), a composite in which active materials C and D are applied to the front and back surfaces of a metal foil 120 for a cathode (etched aluminum foil), respectively. A cathode body 12, an electric double layer capacitor anode body 13 in which active material A is applied to both the front and back surfaces of an anode metal foil 130 (etched aluminum foil) of an electric double layer capacitor, and an anode of a lithium ion battery And a positive electrode 14 for a lithium ion battery in which the active material B was applied to both the front and back surfaces of a metal foil 140 (copper foil).

In Example 3 of the present invention (Embodiment 3 / see FIG. 3), a composite material in which active materials A and B are applied to the front and back surfaces of anode metal foil 110 (etched aluminum foil), respectively. An anode body 11 and a composite cathode body 12 in which active materials C and D were applied to the front and back surfaces of a metal foil 120 for a cathode (etched aluminum foil), respectively, were used.

As Comparative Example 1, a conventional electric double layer capacitor using active materials A and C was prepared.
As Comparative Example 2, a conventional lithium ion secondary battery using active materials B and D was prepared.

The energy density and the power density of each of Examples 1, 2, and 3 and Comparative Examples 1 and 2 were measured. Power density (W / L) Energy density (Wh / L) Example 1 1030 180.7 Example 2 1030 180.7 Example 3 1325 165.2 Comparative Example 1 1520 6.7 Conventional Example 2 The result of 330 304.0 was obtained.

As described above, in the first embodiment to which the present invention is applied,
It was confirmed that the power storage electronic components 1, 1 ′, and 1 ″ according to Examples 2 and 3 exhibited high levels in both the energy density and the power density.

[0060]

As described above, according to the present invention, a completely new composite component having a power density close to an electric double layer capacitor and an energy density close to a lithium ion secondary battery can be obtained. This is a component that compensates for the drawbacks of the electric double layer capacitor and the lithium ion secondary battery and makes use of their respective advantages.
And it is of great practical value.

[Brief description of the drawings]

FIGS. 1A, 1B, and 1C are explanatory views each showing a configuration of an internal element of a power storage electronic component according to Embodiment 1 of the present invention, and a three-terminal structure using the internal element. Circuit diagram of the electronic component for power storage of FIG.
FIG. 3 is an equivalent circuit diagram of a power storage electronic component having a terminal structure.

FIGS. 2A, 2B, and 2C are explanatory diagrams each showing a configuration of an internal element of a power storage electronic component according to Embodiment 2 of the present invention, and a three-terminal structure using the internal element; Circuit diagram of the electronic component for power storage of FIG.
FIG. 3 is an equivalent circuit diagram of a power storage electronic component having a terminal structure.

FIGS. 3A and 3B are an explanatory view showing a configuration of an internal element of a power storage electronic component according to Embodiment 2 of the present invention, and a two-terminal structure for power storage using the internal element, respectively. It is an equivalent circuit diagram of an electronic component.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1 ', 1 "Power storage electronic component 2, 2', 2" Internal element 11 Composite anode body 12 Composite cathode body 13 Anode body for electric double layer capacitor 14 Anode body for lithium ion battery 15 Cathode for electric double layer capacitor Body 16 Cathode for lithium ion battery 110 Metal foil for anode 120 Metal foil for cathode 130 Metal foil for anode of electric double layer capacitor 140 Metal foil for anode of lithium ion secondary battery 150 Metal foil for cathode of electric double layer capacitor 160 Metal foil for cathode of lithium ion secondary battery D + Anode material for electric double layer capacitor D- Cathode material for electric double layer capacitor L + Anode material for lithium ion battery L- Cathode material for lithium ion battery

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) H01M 4/02 H01G 9/00 301D 4/58 301J 10/40 301Z 531 F-term (Reference) 5H029 AJ00 AJ03 AK03 AK08 AL06 AL07 AL08 AM03 AM07 BJ12 DJ07 DJ08 DJ12 EJ01 EJ04 EJ12 5H050 AA08 BA08 BA17 CA08 CA16 CB07 CB08 CB09 DA07 DA08 DA10 DA11 EA10 EA24 FA03 FA08

Claims (5)

[Claims] An internal element in which an anode material for an electric double layer capacitor and a cathode material for an electric double layer capacitor face each other, and an anode material for a lithium ion battery and a cathode material for a lithium ion battery face each other. In the internal element, the anode material for the electric double layer capacitor and the anode material for the lithium ion battery are formed on one side and the other side, respectively. And at least one of the composite cathode bodies in which the cathode material for the electric double layer capacitor and the cathode material for the lithium ion battery are formed on one side and the other side, respectively. An electronic component for power storage characterized by the following. 2. The composite anode body according to claim 1, wherein the anode material for an electric double layer capacitor including at least activated carbon, carbon, and a binder is formed on one surface of a metal foil for an anode, On the other side of the foil,
An electronic component for power storage, wherein the anode material for a lithium ion battery including at least a lithium-based compound, carbon, and a binder is formed. 3. The composite cathode body according to claim 1, wherein the cathode material for an electric double layer capacitor including at least activated carbon, carbon, and a binder is formed on one surface side of a metal foil for a cathode. The negative electrode material for a lithium ion battery, comprising at least one of carbon black, coke, and graphite together with a binder is formed on the other surface side of the metal foil for use. 4. An electrode material containing at least activated carbon, carbon and a binder is formed on one side of a metal foil, and at least a lithium compound is formed on the other side of the metal foil.
A composite electrode body, wherein an electrode material containing carbon and a binder is formed. 5. An electrode material containing at least activated carbon, carbon, and a binder is formed on one surface of a metal foil, and carbon black, coke,
A composite electrode body, wherein an electrode material containing at least one of graphite and a binder is formed.