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JP2010080211A - Battery - Google Patents

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JP2010080211A
JP2010080211A JP2008246168A JP2008246168A JP2010080211A JP 2010080211 A JP2010080211 A JP 2010080211A JP 2008246168 A JP2008246168 A JP 2008246168A JP 2008246168 A JP2008246168 A JP 2008246168A JP 2010080211 A JP2010080211 A JP 2010080211A
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active material
negative electrode
electrode active
material layer
lithium
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Mitsuho Ueda
光保 上田
Osamu Mizuno
修 水野
Hideaki Awata
英章 粟田
Takeshi Kanno
毅 寒野
Rikizo Ikuta
力三 生田
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Sumitomo Electric Industries Ltd
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Sumitomo Electric Industries Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-reliability battery having a negative electrode active material layer which is made of a single metal. <P>SOLUTION: A positive electrode active material layer 1b and a solid electrolyte layer 3 are formed sequentially on a positive electrode collector 1a. A negative electrode active material layer 2b made of lithium and a circular film member 4 are formed on the solid electrolyte layer 3. A negative electrode collector 2a is formed on a negative electrode active material layer 2 and the circular film member 4. The circular film member 4 is made of a material which can resist heat-treated temperature (reflow temperature of solder) in a manufacturing process of the battery. The melting point of lithium is lower than reflow temperature of the solder. The flow of the negative electrode active material layer 2b can be dammed by the circular film member 4, even if the negative electrode active material layer is a fluid, by melting at the time of passing through a reflow furnace. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、単体金属からなる負極活物質層を備えた電池に関する。   The present invention relates to a battery including a negative electrode active material layer made of a single metal.

従来より、負極活物質層として、リチウム膜を備えた電池が知られている。
特許文献1の段落[0010]には、リチウム金属からなる負極を形成することが開示されている。そして、特許文献1では、固体電解質層を正極と負極との間に形成することにより、全固体リチウム電池を形成している。
特開平10−083838号公報
Conventionally, a battery including a lithium film as a negative electrode active material layer is known.
Paragraph [0010] of Patent Document 1 discloses forming a negative electrode made of lithium metal. In Patent Document 1, an all-solid lithium battery is formed by forming a solid electrolyte layer between a positive electrode and a negative electrode.
Japanese Patent Laid-Open No. 10-083838

リチウム二次イオン電池において、負極活物質層は、リチウムイオンを吸蔵および放出するものである。リチウム単体金属は、容量が最も大きく、充放電電位が低いので、負極材料として適している。なお、インジウム,錫,およびビスマスなどの単体金属からなる負極も,高い電池特性を有している。   In the lithium secondary ion battery, the negative electrode active material layer occludes and releases lithium ions. Lithium elemental metal is suitable as a negative electrode material because it has the largest capacity and low charge / discharge potential. Note that the negative electrode made of a single metal such as indium, tin, and bismuth also has high battery characteristics.

しかるに、上記特許文献1の構造では、後の半田リフローなどの熱処理を伴う工程で、負極が融解するおそれがあった。半田リフロー炉の温度は、260℃程度であり、リチウムの融点は、177℃程度だからである。そして、リチウムが融解して流動すると、正極と電気短絡を生じるおそれがあった。インジウム,錫,およびビスマスなどの単体金属も、融点が低いので、同様の不具合を生じるおそれがある。   However, in the structure of Patent Document 1, the negative electrode may be melted in a process involving a heat treatment such as solder reflow. This is because the temperature of the solder reflow furnace is about 260 ° C., and the melting point of lithium is about 177 ° C. And when lithium melt | dissolves and flows, there existed a possibility of producing an electrical short circuit with a positive electrode. Since single metals such as indium, tin, and bismuth also have a low melting point, there is a possibility of causing the same problem.

本発明の目的は、単体金属からなる負極活物質層を有しながら、信頼性の高い電池を提供することにある。   An object of the present invention is to provide a highly reliable battery having a negative electrode active material layer made of a single metal.

本発明の電池は、リチウム,またはリチウムと合金を形成する金属、つまり単体金属からなる負極活物質層を備えている。そして、固体電解質層と負極集電体との間に、負極活物質層を囲むように、環状膜部材を設けたものである。環状膜部材は、製造工程における熱処理に対する耐熱性を有する材料からなる。   The battery of the present invention includes a negative electrode active material layer made of lithium or a metal that forms an alloy with lithium, that is, a single metal. An annular membrane member is provided between the solid electrolyte layer and the negative electrode current collector so as to surround the negative electrode active material layer. The annular membrane member is made of a material having heat resistance against heat treatment in the manufacturing process.

この構造により、本発明の電池は以下のような作用効果を奏することができる。単体金属は、合金よりも一般に融点が低いので、製造工程における熱処理で融解,変形を生じるおそれがある。そのとき、環状膜部材が負極活物質層を囲んでいるので、負極活物質層が周囲にはみ出そうとしても阻止される。したがって、負極活物質層と正極側の部材との接触が妨げられ、電気的短絡を生じることがない。
上述のように、リチウム等の単体金属からなる負極活物質層を備えた電池は、高い電池容量を有している。よって、本発明により、電池特性にすぐれ、信頼性の高い電池が得られる。
With this structure, the battery of the present invention can exhibit the following effects. Since a single metal generally has a lower melting point than an alloy, there is a risk of melting and deformation due to heat treatment in the manufacturing process. At that time, since the annular film member surrounds the negative electrode active material layer, the negative electrode active material layer is prevented from protruding to the periphery. Therefore, contact between the negative electrode active material layer and the positive electrode member is prevented, and an electrical short circuit does not occur.
As described above, a battery including a negative electrode active material layer made of a single metal such as lithium has a high battery capacity. Therefore, according to the present invention, a battery having excellent battery characteristics and high reliability can be obtained.

上記熱処理としては、実装のために施される半田接合の際の半田リフロー(約260℃)がある。ただし、これに限定されるものではない。   As the heat treatment, there is solder reflow (about 260 ° C.) at the time of solder bonding performed for mounting. However, it is not limited to this.

負極活物質層としては、リチウム,インジウム,錫,ビスマスなどの金属がある。インジウム,錫,ビスマスは、リチウムと合金を形成する金属であり、高いリチウムイオンの吸蔵,放出機能を有している。リチウムの融点は177℃、インジウムの融点は156℃、錫の融点は232℃、ビスマスの融点は271℃である。したがって、半田のリフロー工程で、これらの金属が融解,変形を生じるおそれがあるが、環状膜部材によって、信頼性が維持される。   Examples of the negative electrode active material layer include metals such as lithium, indium, tin, and bismuth. Indium, tin, and bismuth are metals that form an alloy with lithium and have a high lithium ion storage and release function. The melting point of lithium is 177 ° C., the melting point of indium is 156 ° C., the melting point of tin is 232 ° C., and the melting point of bismuth is 271 ° C. Therefore, in the solder reflow process, these metals may be melted and deformed, but the reliability is maintained by the annular film member.

負極活物質層を構成する金属としては、融点が低く、大きな電池容量を確保しうるリチウム、またはインジウムが特に好ましい。リチウムやインジウムが、半田のリフロー工程で流動しても、環状膜部材によって曲がれがせき止められる。   As the metal constituting the negative electrode active material layer, lithium or indium that has a low melting point and can secure a large battery capacity is particularly preferable. Even if lithium or indium flows in the solder reflow process, the ring film member prevents the bending.

本発明の電池によると、単体金属からなる負極活物質層を有しながら、製造工程における熱処理に対する信頼性の高い電池が得られる。   According to the battery of the present invention, a battery having high reliability with respect to heat treatment in the manufacturing process can be obtained while having a negative electrode active material layer made of a single metal.

図1(a)〜(d)は、本発明の実施の形態に係るリチウム二次電池の蓄電部Aを形成する手順を示す縦断面図である。本実施の形態の電池は、特に、携帯電話等の電子機器のバックアップ電源用として有用なものである。   1A to 1D are longitudinal sectional views showing a procedure for forming a power storage unit A of a lithium secondary battery according to an embodiment of the present invention. The battery of the present embodiment is particularly useful as a backup power source for electronic devices such as mobile phones.

まず、図1(a)に示す工程で、以下の処理を行う。内径10mm程度の金型51と、金型51の内径に一致する外径を有するポンチ52とを準備する。そして、金型51の内径に一致する外径を有する正極集電体1aを形成しておく。正極集電体1aは、SUS304,SUS316,Cuなどの金属箔からなる。正極集電体1aの厚みは、500μm程度である。   First, the following processing is performed in the step shown in FIG. A mold 51 having an inner diameter of about 10 mm and a punch 52 having an outer diameter that matches the inner diameter of the mold 51 are prepared. Then, a positive electrode current collector 1 a having an outer diameter that matches the inner diameter of the mold 51 is formed. The positive electrode current collector 1a is made of a metal foil such as SUS304, SUS316, or Cu. The thickness of the positive electrode current collector 1a is about 500 μm.

そして、正極集電体1aの上に、正極用の活物質粒子と電解質粒子との混合物を配置する。正極用の活物質としては、LiCoO,LiMnO,MnO,これらの混合物,などがある。ここでは、上記活物質粒子として、平均粒径10μm程度の粉末を用いる。また、導電補助剤として、カーボンブラック,天然黒鉛,熱膨張黒鉛,炭素黒鉛,酸化ルテニウム,酸化チタンを添加することができる。補助部材としては、アルミニウム,ニッケルなどの金属繊維もある。 Then, a mixture of positive electrode active material particles and electrolyte particles is disposed on the positive electrode current collector 1a. Examples of the active material for the positive electrode include LiCoO 2 , LiMnO 2 , MnO 2 , and mixtures thereof. Here, a powder having an average particle size of about 10 μm is used as the active material particles. Further, carbon black, natural graphite, thermally expanded graphite, carbon graphite, ruthenium oxide, and titanium oxide can be added as a conductive auxiliary agent. Examples of auxiliary members include metal fibers such as aluminum and nickel.

電解質粒子としては、硫化物粒子の表面にリチウムイオン伝導性を有する酸化膜を被覆したものを用いる。硫化物粒子としては、Li−P−S−Oや、LiSとPとからなるLi−P−Sがある。これらの物質粒子には、アモルファス粒子あるいは多結晶粒子がある。リチウムイオン伝導性を有する酸化膜としては、LiNbO,LiTaOなどを用いることができる。 As the electrolyte particles, those obtained by coating the surfaces of sulfide particles with an oxide film having lithium ion conductivity are used. Examples of the sulfide particles include Li—P—S—O and Li—P—S composed of Li 2 S and P 2 S 6 . These substance particles include amorphous particles or polycrystalline particles. As the oxide film having lithium ion conductivity, LiNbO 3 , LiTaO 3 or the like can be used.

上記正極用の活物質と電解質粒子とを、たとえば70:30の割合で混合したもの正極集電体1aの上に配置する。そして、ポンチ52を用いて、圧力500MPa程度でプレスすることにより、正極活物質層1bを形成する。正極活物質層1bの厚みは、100μm程度である。   The positive electrode active material and the electrolyte particles are mixed, for example, in a ratio of 70:30, and disposed on the positive electrode current collector 1a. Then, the positive electrode active material layer 1b is formed by pressing the punch 52 at a pressure of about 500 MPa. The thickness of the positive electrode active material layer 1b is about 100 μm.

さらに、正極活物質層1bの上に、固体電解質層用の硫化物粒子を配置する。この硫化物粒子は、正極活物質層1bに添加した電解質粒子と同じものでもよいし、異なるものでもよい。すなわち、Li−P−S−Oや、LiSおよびPからなるLi−P−Sを用いることができる。そして、上記と同じ条件で、プレスすることにより、固体電解質層3を形成する。固体電解質層3の厚みは、200μm〜500μm程度である。
また、未プレス状態の正極用の活物質と電解質粒子の混合物の上に、固体電解質層用の硫化物粒子を配置してプレスしてもよい。これにより正極活物質層1bと固体電解質層3とを同時に形成することができる。
Further, sulfide particles for the solid electrolyte layer are disposed on the positive electrode active material layer 1b. The sulfide particles may be the same as or different from the electrolyte particles added to the positive electrode active material layer 1b. That is, Li—P—S—O or Li—P—S composed of Li 2 S and P 2 S 6 can be used. And the solid electrolyte layer 3 is formed by pressing on the same conditions as the above. The thickness of the solid electrolyte layer 3 is about 200 μm to 500 μm.
Alternatively, the sulfide particles for the solid electrolyte layer may be arranged and pressed on the mixture of the positive electrode active material and the electrolyte particles in an unpressed state. Thereby, the positive electrode active material layer 1b and the solid electrolyte layer 3 can be formed simultaneously.

次に、図1(b)に示す工程で、固体電解質層3の上にリチウム箔を貼り付けて、単体リチウムからなる負極活物質層2bを形成する。負極活物質層2bの厚みは、20μm〜500μmまで可能である。負極活物質層2bの厚みが大きいほど電池容量も増大するが、電池全体は厚くなる。
なお、リチウム箔を固体電解質層用の硫化物粒子の上に配置して、リチウム箔の上からプレスを行なってもよい。
Next, in the step shown in FIG. 1B, a lithium foil is pasted on the solid electrolyte layer 3 to form the negative electrode active material layer 2b made of simple lithium. The thickness of the negative electrode active material layer 2b can be 20 μm to 500 μm. The battery capacity increases as the thickness of the negative electrode active material layer 2b increases, but the entire battery becomes thicker.
In addition, a lithium foil may be arrange | positioned on the sulfide particle for solid electrolyte layers, and you may press from on lithium foil.

次に、図1(c)に示す工程で、固体電解質層3の上に、負極活物質層2bを囲む環状膜部材4を形成する。このとき、後述する材料からなるフィルムを環状に切り抜いて、固体電解質層3の上に貼り付ける。ただし、環状膜部材4の形成方法は、これに限定されるものではない。たとえば、固体電解質層3および負極活物質層2bの上に貼り付けられたフィルムを、エッチングによりパターニングしてもよい。   Next, in the step shown in FIG. 1C, the annular membrane member 4 surrounding the negative electrode active material layer 2 b is formed on the solid electrolyte layer 3. At this time, a film made of a material to be described later is cut out in an annular shape and attached onto the solid electrolyte layer 3. However, the formation method of the annular film member 4 is not limited to this. For example, the film attached on the solid electrolyte layer 3 and the negative electrode active material layer 2b may be patterned by etching.

図2は、負極活物質層2bおよび環状膜部材4の平面形状を示す平面図である。環状膜部材4は、負極活物質層2bの周囲を閉環状に取り囲んでいる。
環状膜部材4は、負極活物質層2bと同程度の厚みを有していればよい。環状膜部材4は、銅(Cu),ステンレス合金(SUS),Al等の金属や、ポリプロピレン(PP),ポリフェニレンエーテル(PPE),ポリフェニレンサルファイド(PPS)などの耐熱性の高い樹脂からなる。
環状膜部材4は、短絡防止の観点からすれば、上記材料のうち絶縁性部材である樹脂材料が好ましい。ただし、導体材料であっても、正極活物質層1bに接触しなければ、電気的短絡は生じない。
FIG. 2 is a plan view showing the planar shapes of the negative electrode active material layer 2 b and the annular film member 4. The annular film member 4 surrounds the negative electrode active material layer 2b in a closed ring shape.
The annular film member 4 only needs to have the same thickness as the negative electrode active material layer 2b. The annular film member 4 is made of a metal such as copper (Cu), stainless steel alloy (SUS), Al, or a resin having high heat resistance such as polypropylene (PP), polyphenylene ether (PPE), polyphenylene sulfide (PPS).
The annular film member 4 is preferably a resin material that is an insulating member among the above materials from the viewpoint of preventing short circuit. However, even if it is a conductor material, if it does not contact the positive electrode active material layer 1b, an electrical short circuit does not occur.

次に、図1(d)に示す工程で、負極活物質層2bおよび環状膜部材4の上に、負極集電体2aを積層する。負極集電体2aは、Cu,Ni,Fe,Cr,またはこれらの合金の箔を圧着して形成することができる。これにより、リチウム二次電池の蓄電部Aが形成される。   Next, in the step shown in FIG. 1D, the negative electrode current collector 2 a is laminated on the negative electrode active material layer 2 b and the annular film member 4. The negative electrode current collector 2a can be formed by pressing a foil of Cu, Ni, Fe, Cr, or an alloy thereof. Thereby, the electrical storage part A of a lithium secondary battery is formed.

蓄電部Aは、正極部材1の両側に、固体電解質層3を挟んで、負極部材2を積層した構造となっている。正極部材1は、正極リード部材である板状の正極集電体1aと正極活物質層1bとを有している。負極部材2は、負極集電体2aと負極活物質層2bとを有している。   The power storage unit A has a structure in which the negative electrode member 2 is laminated on both sides of the positive electrode member 1 with the solid electrolyte layer 3 interposed therebetween. The positive electrode member 1 has a plate-like positive electrode current collector 1a and a positive electrode active material layer 1b which are positive electrode lead members. The negative electrode member 2 has a negative electrode current collector 2a and a negative electrode active material layer 2b.

蓄電部Aは、その後の実装工程を経て、容器に収容され、リチウム二次電池となる。本実施の形態の電池は、バックアップ用電源に適しており、コイン型構造を採るのが一般的である。   The power storage unit A is housed in a container through a subsequent mounting process, and becomes a lithium secondary battery. The battery of this embodiment is suitable for a backup power source and generally adopts a coin-type structure.

本実施の形態によると、以下の効果が得られる。
図1(d)に示す蓄電部Aは、その後の実装工程を経て、容器に収容される。その際、正極集電体1aや負極集電体2aを電池の端子と接合する際に、半田リフロー工程を経る。リチウム単体の融点は、177℃程度である。半田リフロー工程では、リフロー炉内で260℃程度の高温に保持されるので、負極活物質層2bは融解して流動するおそれがある。しかし、負極活物質層2bが流動しても、環状膜部材4によって、流れがせき止められる。したがって、負極活物質層2bが正極活物質層1bや正極集電体1aと接触することはない。よって、電気的短絡を防止することができ、電池の信頼性を維持することができる。
According to the present embodiment, the following effects can be obtained.
The power storage unit A shown in FIG. 1D is accommodated in a container through a subsequent mounting process. At that time, when the positive electrode current collector 1a and the negative electrode current collector 2a are joined to the terminals of the battery, a solder reflow process is performed. The melting point of lithium alone is about 177 ° C. In the solder reflow process, the negative electrode active material layer 2b may melt and flow because it is maintained at a high temperature of about 260 ° C. in a reflow furnace. However, even if the negative electrode active material layer 2 b flows, the flow is blocked by the annular film member 4. Therefore, the negative electrode active material layer 2b does not come into contact with the positive electrode active material layer 1b or the positive electrode current collector 1a. Therefore, an electrical short circuit can be prevented and the reliability of the battery can be maintained.

(他の実施の形態)
実施の形態においては、負極活物質層2bをリチウム膜としたが、これに限定されるものではない。
負極活物質は、リチウムと合金を形成する元素であれば、リチウムイオンを吸蔵,放出する機能を有する。リチウムと合金を形成する元素としては、アルミニウム(Al),インジウム(In),シリコン(Si),錫(Sn),ビスマス(Bi)などがある。そのうち、インジウム,錫,ビスマスなどの金属は、比較的融点が低い。インジウムの融点は156℃、錫の融点は232℃、ビスマスの融点は271℃である。
(Other embodiments)
In the embodiment, the negative electrode active material layer 2b is a lithium film, but the present invention is not limited to this.
If the negative electrode active material is an element that forms an alloy with lithium, it has a function of inserting and extracting lithium ions. Examples of elements that form an alloy with lithium include aluminum (Al), indium (In), silicon (Si), tin (Sn), and bismuth (Bi). Among them, metals such as indium, tin and bismuth have a relatively low melting point. The melting point of indium is 156 ° C., the melting point of tin is 232 ° C., and the melting point of bismuth is 271 ° C.

負極活物質層3を構成するリチウム以外の金属としては、融点が低く、大きな電池容量を確保しうるインジウムが特に好ましい。インジウムは、融点が156℃と低いので、半田のリフロー工程で流動するおそれがある。しかし、本発明では、環状膜部材4によって曲がれがせき止められるので、電気的短絡を有効に防止することができる。   The metal other than lithium constituting the negative electrode active material layer 3 is particularly preferably indium, which has a low melting point and can secure a large battery capacity. Since indium has a low melting point of 156 ° C., it may flow in the solder reflow process. However, in the present invention, since the bending is prevented by the annular film member 4, an electrical short circuit can be effectively prevented.

負極活物質層2bを、錫やビスマスにより構成した場合にも、半田のリフロー工程で、負極活物質層2bが融解,変形を生じるおそれがある。しかし、本発明の環状膜部材4によって、負極活物質層2bと正極活物質1b等との接触が妨げられる。よって、このような実施の形態を採用した場合にも、電池の信頼性を維持することができる。   Even when the negative electrode active material layer 2b is made of tin or bismuth, the negative electrode active material layer 2b may be melted or deformed in the solder reflow process. However, the annular membrane member 4 of the present invention prevents contact between the negative electrode active material layer 2b and the positive electrode active material 1b. Therefore, even when such an embodiment is adopted, the reliability of the battery can be maintained.

上記実施の形態では、負極活物質層2bとして、リチウム箔を用いたが、リチウム等をPVD法を用いて堆積してもよい。   In the above embodiment, lithium foil is used as the negative electrode active material layer 2b. However, lithium or the like may be deposited using a PVD method.

上記実施の形態では、正極活物質層1bおよび固体電解質層3を、粉末プレス成形により形成した。しかし、本発明の正極活物質層1bおよび固体電解質層3の形成方法は、これに限定されるものではない。たとえば、正極活物質層1bや固体電解質層3をPVD法、あるいはCVD法によって形成してもよい。   In the above embodiment, the positive electrode active material layer 1b and the solid electrolyte layer 3 are formed by powder press molding. However, the method for forming the positive electrode active material layer 1b and the solid electrolyte layer 3 of the present invention is not limited to this. For example, the positive electrode active material layer 1b and the solid electrolyte layer 3 may be formed by a PVD method or a CVD method.

上記実施の形態の構造は、例示にすぎず、本発明の範囲はこれらの記載の範囲に限定されるものではない。本発明の範囲は、特許請求の範囲の記載と、その記載と均等の意味及び範囲内でのすべての変更を含むものである。   The structure of the said embodiment is only an illustration and the range of this invention is not limited to the range of these description. The scope of the present invention includes the description of the scope of claims, meaning equivalent to the description, and all modifications within the scope.

本発明の成膜方法により形成された固体電解質膜を有する電池は、時計,電卓などの電子機器用の電源として利用することができる。   A battery having a solid electrolyte membrane formed by the film forming method of the present invention can be used as a power source for electronic devices such as watches and calculators.

(a)〜(d)は、発明の実施の形態における蓄電部を形成する手順を示す縦断面図である。(A)-(d) is a longitudinal cross-sectional view which shows the procedure which forms the electrical storage part in embodiment of invention. 実施の形態に係る蓄電部の縦断面図である。It is a longitudinal cross-sectional view of the electrical storage part which concerns on embodiment.

符号の説明Explanation of symbols

A 蓄電部
1 正極部材
1a 集電体
1b 正極
2 負極部材
2a 集電体
2b 負極
2b1 リチウム膜
2b2 アルミニウム膜
3 固体電解質層
4 環状膜部材
A power storage unit 1 positive electrode member 1a current collector 1b positive electrode 2 negative electrode member 2a current collector 2b negative electrode 2b1 lithium film 2b2 aluminum film
3 Solid electrolyte layer 4 Annular membrane member

Claims (3)

正極活物質層と、負極活物質層と、前記正極活物質層−負極活物質層間に介在する固体電解質層と、前記負極活物質層を挟んで前記固体活物質層に対向する負極集電体とを備えた電池であって、
前記負極活物質層は、リチウム,またはリチウムと合金を形成する金属からなり、
前記固体電解質層と負極集電体との間には、製造工程における熱処理に対する耐熱性を有する材料からなる、前記負極活物質層を囲む環状膜部材が設けられている、電池。
A positive electrode active material layer; a negative electrode active material layer; a solid electrolyte layer interposed between the positive electrode active material layer and the negative electrode active material layer; and a negative electrode current collector facing the solid active material layer with the negative electrode active material layer interposed therebetween A battery with
The negative electrode active material layer is made of lithium or a metal that forms an alloy with lithium,
A battery in which an annular film member surrounding the negative electrode active material layer is provided between the solid electrolyte layer and the negative electrode current collector, which is made of a material having heat resistance against heat treatment in a manufacturing process.
請求項1記載の電池において、
前記熱処理は、半田接合工程における半田リフローである、電池。
The battery according to claim 1.
The battery, wherein the heat treatment is solder reflow in a solder bonding process.
請求項1または2記載の電池において、
前記負極活物質層は、リチウム,インジウム,錫,およびビスマスから選ばれる1つの金属である、電池。
The battery according to claim 1 or 2,
The battery, wherein the negative electrode active material layer is one metal selected from lithium, indium, tin, and bismuth.
JP2008246168A 2008-09-25 2008-09-25 Battery Pending JP2010080211A (en)

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JPWO2015137099A1 (en) * 2014-03-14 2017-04-06 株式会社村田製作所 Charging circuit and module using the same
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JPWO2015137099A1 (en) * 2014-03-14 2017-04-06 株式会社村田製作所 Charging circuit and module using the same
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