JP2010061861A - Electrode, nonaqueous electrolyte battery using the same, and method of manufacturing nonaqueous electrolyte battery - Google Patents

Abstract

An electrode for a non-aqueous electrolyte battery with less distortion at an electrode extraction portion of a current collector is provided.
In an electrode E for a lithium secondary battery, an active material powder compact 20 is disposed on both sides of a current collector 1, and then the current collector 1 is sandwiched between the two compact compacts 20. It is manufactured by heating in a state and sintering the green compact 20 integrally with the current collector 1 to form an active material layer (sintered body) 2. The current collector 1 is formed by arranging a plurality of metal wires 110 in parallel at intervals, and an electrode extraction portion 11 exposed from the active material layer 2 is formed at each end portion (linear piece) of the metal wire 110. It is configured. On the other hand, the active material layer forming portion 12 whose surface is covered with the active material layer 2 is formed in a lattice shape in which the metal wires 110 are connected to each other by a connecting member 120 arranged so as to intersect with the plurality of metal wires 110. Has been.
[Selection] Figure 1

Description

  The present invention relates to an electrode for a nonaqueous electrolyte battery comprising a pair of active material layers containing an active material and a current collector sandwiched therebetween, and a nonaqueous electrolyte battery and a nonaqueous electrolyte battery using the same Regarding the method.

  Non-aqueous electrolyte batteries have a long life, high efficiency, and high capacity, and are used as power sources for mobile phones, notebook computers, digital cameras, and the like. A typical example of the nonaqueous electrolyte battery is a lithium secondary battery.

  A lithium secondary battery is a battery that discharges and charges when lithium ions move between a positive electrode and a negative electrode through an electrolyte layer. As an electrode used in this lithium secondary battery, an electrode in which a current collector is sandwiched between active material sintered bodies is known (for example, see Patent Document 1).

  Patent Document 1 discloses an electrode in which a current collector is provided with a penetrating portion, and the sintered bodies are fixed to both surfaces of the current collector by joining the sintered bodies via a connecting portion formed in the penetrating portion. Has been proposed. Further, in the lithium secondary battery described in Patent Document 1, the end portion (electrode extraction portion) of the current collector exposed from the sintered body is welded to a terminal provided in the battery outer case, and the terminal is electrically connected. It is connected to the.

Japanese Patent Laid-Open No. 2000-251876 (FIG. 1)

  Conventionally, aluminum and copper metal foils are generally used as current collectors for electrodes for lithium secondary batteries. Patent Document 1 also describes that a metal foil having a through hole or a metal mesh may be used as a current collector. However, as a result of intensive studies by the present inventors, such a current collector has a problem that distortion (for example, wrinkles) occurs in the electrode extraction portion of the current collector during electrode production. Furthermore, when a nonaqueous electrolyte battery is manufactured using an electrode in which the electrode extraction portion is distorted, there is a problem that workability for connecting the electrode extraction portion and the terminal is lowered.

  The mechanism that causes distortion in the electrode lead-out part is considered as follows.

  FIG. 4 is a diagram for explaining a conventional electrode for a lithium secondary battery. Usually, an electrode E having a laminated structure composed of a pair of sintered bodies 2 of active materials and a current collector 1x sandwiched therebetween is manufactured as follows. First, a pair of compacted compacts 20 in which active material powder is put into a mold and compressed are prepared, and the electrode extraction part of the current collector 1x made of metal foil projects in one direction from the end face of the compacted compact 20 Then, the green compact 20 is disposed on both surfaces of the current collector 1x (see FIG. 4A). Then, heating is performed in a state where the current collector 1x is sandwiched between a pair of powder compacts 20, and the powder compact 20 and the current collector 1x are integrally sintered.

  The sintered body 2 obtained by sintering the green compact 20 contracts in volume before and after sintering. For this reason, the stress to be contracted acts on the portion (active material layer forming portion 12) covered with the sintered body 2 of the current collector 1x, and not only this portion is distorted but also the sintered body. The electrode lead-out portion 11 is also distorted, for example, the electrode lead-out portion 11 of the current collector 1x exposed from 2 undulates (see FIG. 4B).

  Here, the case where a metal foil that is not processed at all is used for the current collector has been described. However, at the time when the compacting body and the current collector are sintered together, the electrode extraction portion is orthogonal to the protruding direction. If it has a two-dimensional structure continuously connected in the direction, distortion will occur in the electrode extraction portion. For this reason, even when a metal foil or metal mesh with through holes is used as the current collector, distortion occurs in the electrode extraction portion of the current collector as in the case of using the metal foil.

  The present invention has been made in view of the above circumstances, and one of its purposes is to provide an electrode with a small strain at the electrode extraction portion of the current collector exposed from the active material layer.

  (1) An electrode for a nonaqueous electrolyte battery of the present invention includes a pair of active material layers containing an active material, and a current collector sandwiched therebetween. The active material layer is formed by sintering integrally with the current collector. The current collector has an active material layer forming portion whose surface is covered with the active material layer, and an electrode extraction portion exposed from the active material layer. The electrode lead-out portion protrudes in one direction of the active material layer and is composed of a plurality of linear pieces arranged at intervals, and the linear pieces are not connected to each other.

  According to this configuration, the electrode extraction portion of the current collector protrudes in one direction of the active material layer and has a structure composed of a plurality of linear pieces that are arranged at intervals and are not connected to each other. Are not continuously connected in the direction perpendicular to the protruding direction.

  Therefore, when the active material layer is sintered integrally with the current collector, even if distortion occurs in the active material layer forming portion of the current collector, the electrode extraction portion composed of a plurality of linear pieces that are not connected to each other Is difficult to cause distortion, and the distortion of the electrode extraction portion is reduced. In addition, at the end of sintering, even if the free end sides of the plurality of linear pieces are scattered in the thickness direction of the electrode (the direction from one active material layer side to the other active material layer side), the shape is The linear linear piece is rich in bendability, and it is easy to position each linear piece on the same plane. As a result, the distortion of the electrode extraction portion is reduced. Here, “not connected to each other” in the present invention means that the constituent members of the electrode extraction portion are not connected to each other when the active material layer and the current collector are sintered together. When a non-aqueous electrolyte battery is manufactured using this electrode, it does not include that each linear piece is connected by being connected to a member other than the current collector, for example, a terminal. Further, before the electrode is used for a non-aqueous electrolyte battery after sintering, the linear pieces may be bundled together, or the linear pieces may be integrated with a separately prepared conductive foil. In addition, it is possible to efficiently connect the electrode take-out part.

  Note that in the present invention, projecting in one direction means projecting in at least one direction, and includes a case of projecting in a plurality of directions of the active material layer. In this case, the current collector has a plurality of electrode extraction portions.

  Here, the shape of the active material layer forming portion is not particularly limited, and may be a foil shape or a punching metal shape or a lattice shape as described later. Further, the cross-sectional shape of the linear piece is not particularly limited, and may be a polygonal shape such as a circular shape, an elliptical shape, or a rectangular shape. In addition to forming the active material layer forming portion and the linear piece (electrode extraction portion) from a single sheet, the current collector may be configured such that both are separate members and are joined together by welding or the like. .

  (2) In this invention, it is preferable that the active material layer formation part is provided with the opening part which connects one active material layer and the other active material layer.

  By providing the opening in the active material layer forming portion, one active material layer and the other active material layer can be connected through the opening. That is, when the active material layer is sintered integrally with the current collector, the sintered bodies (active material layers) positioned with the active material layer forming portion interposed therebetween can be directly connected to form an integrated object. Therefore, the active material layer can be firmly fixed to the current collector, and since this connecting portion also contains the active material, it contributes as a power generation element, so that the capacity density of the electrode can be increased.

  Specific examples of the shape of the active material layer forming portion include a punching metal shape and a lattice shape. The active material layer forming portion having such a shape has a shape that easily absorbs strain compared to the foil shape, and the active material layer is unlikely to peel off due to the introduced strain. It is possible to improve the adhesion.

  (3) In the present invention, the current collector is preferably formed by arranging a plurality of metal wires in parallel.

  Even if the current collector is constituted by a plurality of metal wires arranged in parallel at intervals, the object of the present invention can be achieved. In this case, each end of the metal wire protruding in one direction of the active material layer can be achieved. The part corresponds to the above-described linear piece. In addition, the active material layer forming portion having a structure in which a plurality of metal wires are arranged is less likely to be distorted and can further enhance the adhesion of the active material layer.

  (4) It is preferable that the active material layer forming portion of the current collector is formed in a lattice shape by a connecting member arranged so as to intersect with a plurality of metal wires.

  By connecting the metal wires with a connecting member and forming the active material layer forming portion in a lattice shape, it can be handled as an integrated object, and the efficiency of the electrode manufacturing operation can be improved. The metal wire and the connecting member may be integrated by knitting, or may be integrated by joining the intersections by welding or the like. Further, the metal wire and the connecting member may be made of the same material, may be made of different materials, and the same metal wire may be used for the connecting member.

  (5) It is preferable that the interval between the metal wires is not more than twice the thickness of the active material layer.

  When the active material layer forming portion having a structure in which a plurality of metal wires are arranged is viewed in plan, the distance farthest from the metal wires is equal to 1/2 of the interval between the metal wires, and the electrode is cut in parallel with the current collector surface. In FIG. 2, the electron conduction distance in the active material located at the center between the metal wires is the longest (see FIG. 2A). On the other hand, in the longitudinal section obtained by cutting the electrode in a direction perpendicular to the current collector surface, when the distance farthest from the metal wire is considered to be equal to the thickness of the active material layer, the electrode surface (the current collector current collector and The electron conduction distance in the active material located on the surface opposite to the surface that abuts is the longest (see FIG. 2B). Therefore, if the distance between the metal lines is set to be not more than twice the thickness of the active material layer, the longest electron conduction distance is limited to the thickness of the active material layer, so that the increase in the internal resistance of the electrode can be suppressed. it can.

  (6) The nonaqueous electrolyte battery of the present invention includes a positive electrode, a negative electrode, and an electrolyte layer interposed between the positive and negative electrodes, and the positive electrode or the negative electrode is the electrode of the present invention.

  In the non-aqueous electrolyte battery of the present invention, the strain generated in the electrode extraction portion of the current collector is reduced, so that it is possible to reduce a useless space due to the existing strain. As a result, the energy density per volume of the nonaqueous electrolyte battery can be improved. In particular, when the nonaqueous electrolyte battery is configured by laminating the electrodes of the present invention, the effect is great. Note that the non-aqueous electrolyte battery here includes both the primary battery and the secondary battery because the effects of the present invention are exhibited.

  (7) The method for producing a nonaqueous electrolyte battery of the present invention includes a step of using the electrode of the present invention and connecting a plurality of linear pieces to terminals of the nonaqueous electrolyte battery.

  In the electrode of the present invention, the distortion generated in the electrode extraction portion is small. Therefore, by using the electrode of the present invention and connecting the electrode extraction portion to the terminal, the operation of connecting the electrode extraction portion and the terminal is facilitated. Therefore, the working efficiency for producing the nonaqueous electrolyte battery is improved. In addition, the linear pieces may be bundled together or may be integrated with a separately prepared conductive foil or the like, and in this way, the electrode extraction portion can be connected efficiently.

  As a specific example of the method of connecting each linear piece of the electrode extraction part in the current collector and the terminal of the nonaqueous electrolyte battery, for example, a method of connecting each linear piece to the terminal with a conductive paste, or each linear piece There is a method in which the conductive foil is integrally connected and the conductive foil is connected to the terminal.

  Here, the same material as the current collector can be used for the conductive foil. Moreover, what is necessary is just to integrate a conductive foil with each linear piece by methods, such as crimping | bonding, after producing an electrode and before using it for a nonaqueous electrolyte battery. Thereby, the stress which acts at the time of electrode preparation is not added to a conductive foil, and distortion does not arise.

  In carrying out the method for manufacturing a nonaqueous electrolyte battery of the present invention, not all of the linear pieces of the electrode extraction part are connected to the terminals, for example, only one of the linear pieces is not connected to the terminals. Even if it exists, there exists an effect of this invention. Therefore, a nonaqueous electrolyte battery in which only one of the plurality of linear pieces is not connected to the terminal can also be produced by the manufacturing method of the present invention.

  The electrode for a nonaqueous electrolyte battery according to the present invention has a structure comprising a plurality of linear pieces in which an electrode extraction portion of a current collector protrudes in one direction of an active material layer and is arranged at intervals and not connected to each other Therefore, the distortion generated in the electrode extraction portion is small. Therefore, when the electrode of the present invention is connected to the terminal of the nonaqueous electrolyte battery, the connection work between the electrode take-out portion and the terminal is easy, and the working efficiency is improved.

  In addition, when the electrode of the present invention is used in a nonaqueous electrolyte battery, the distortion generated in the electrode extraction portion of the current collector is reduced, so that the volume energy density of the nonaqueous electrolyte battery is improved.

  The electrode for a nonaqueous electrolyte battery and the nonaqueous electrolyte battery of the present invention will be described in more detail.

When the electrode of the present invention is used as a positive electrode of a nonaqueous electrolyte battery, the active material includes lithium cobaltate (LiCoO ₂ ), lithium manganate (LiMn ₂ O ₄ , LiMnO ₂ ), lithium nickelate (LiNiO ₂ ). And lithium metal oxide selected from olivine-type lithium iron phosphate (LiFePO ₄ ), manganese oxide (MnO ₂ ), or a mixture thereof. In addition, one kind of sulfide selected from sulfur (S), iron sulfide (FeS), iron disulfide (FeS ₂ ), lithium sulfide (Li ₂ S) and titanium sulfide (TiS ₂ ), or a mixture thereof May be used. Among these, lithium metal oxides, particularly LiCoO _2, are excellent because of their excellent electron conductivity. Moreover, as a material of a collector, aluminum (Al), nickel (Ni), these alloys, and stainless steel are suitable.

  When the above-mentioned positive electrode active material powder is sintered to form an active material layer made of a sintered body, the particle size of the active material powder should be 1 to 10 μm in consideration of the output characteristics of the electrode. Is preferred. In addition, the thickness of the active material layer is preferably 50 to 100 μm in consideration of the high capacity and thinning of the battery. The thickness of the current collector is preferably 10 to 20 μm.

  When the electrode of the present invention is used as the negative electrode of a nonaqueous electrolyte battery, the active material is made of metal lithium (Li metal alone) or lithium alloy (alloy made of Li and an additive element), carbon such as graphite (C ), Silicon (Si), or indium (In). Among them, a material containing lithium, particularly metallic lithium, is advantageous in terms of increasing the capacity and voltage of the battery, and is preferable. As an additive element of the lithium alloy, aluminum (Al), silicon (Si), tin (Sn), bismuth (Bi), zinc (Zn), indium (In), or the like can be used. Moreover, copper (Cu) and nickel (Ni) are suitable as the current collector material.

In the nonaqueous electrolyte battery of the present invention, the electrolyte layer can be composed of, for example, a solid electrolyte or an organic electrolyte. When the electrolyte layer is composed of a solid electrolyte, it is preferable to use a sulfide-based solid electrolyte with high lithium ion conductivity. Examples of such sulfide-based solid electrolytes include Li-PS-based and Li-PSO-based ones. In addition, a Li-PO-based or Li-PON-based oxide-based solid electrolyte may be used. When the electrolyte layer is composed of an organic electrolyte, a separator impregnated with an organic electrolyte in which a lithium salt is dissolved in an organic solvent may be used. As the organic solvent, ethylene carbonate, diethyl carbonate, a mixed solvent thereof or the like can be used. As the lithium salt, lithium hexafluorophosphate (LiPF ₆ ), lithium tetrafluoroborate (LiBF ₄ ), or the like can be used.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Moreover, the same code | symbol is attached | subjected to the same member in the figure.

Example 1
1A and 1B are diagrams for explaining an example of an electrode for a lithium secondary battery according to the present invention, wherein FIG. 1A is a schematic explanatory view showing a manufacturing procedure thereof, and FIG. 1B is a schematic perspective view thereof. Show. 2A is a schematic plan view of the electrode of FIG. 1 cut in parallel with the current collector surface, and FIG. 2B is a schematic longitudinal sectional view taken along line AA in FIG. is there.

  The basic structure of the electrode E for a lithium secondary battery is a structure in which the current collector 1 is sandwiched between a pair of active material layers 2 (see FIG. 1B). The active material layer 2 is made of a sintered body obtained by sintering active material powder, and is formed by sintering together with the current collector 1. Further, the current collector 1 has an active material layer forming portion 12 whose surface is covered with the active material layer 2 and an electrode extraction portion 11 exposed from the active material layer 2. Here, one of the features of the present invention is that the electrode extraction portion 11 protrudes in one direction of the active material layer 2 and includes a plurality of linear pieces arranged at intervals, and each linear piece is They are not connected to each other.

  The current collector 1 is formed by arranging a plurality of metal wires 110 in parallel with one direction at intervals, and the electrode lead-out portion 11 protrudes in one direction from the end face of the active material layer 2 It is comprised by each edge part (linear piece). On the other hand, the active material layer forming portion 12 is formed in a lattice shape having metal openings 110 connected to each other by a connecting member 120 arranged so as to cross the plurality of metal wires 110 and having openings 130 ( (See FIG. 2 (A)).

  In this example, the metal wire 110 and the connecting member 120 are made of aluminum round wires having the same wire diameter of 20 μm, and the metal wire 110 and the connecting member 120 are integrated by being knitted together. Further, the metal wires 110 and the connecting members 120 are arranged at equal intervals, and the interval p between the metal wires is set to 100 μm.

The electrode E was produced as follows. First, a pair of compacted compacts 20 in which LiCoO ₂ powder having a particle size of 3 μm is put in a mold and compressed, the pair of compacted compacts 20 is connected to the electrode extraction part of the current collector 1 is compacted compact 20 It arrange | positions on both surfaces of the electrical power collector 1 so that it may protrude in one direction from the end surface (refer FIG. 1 (A)). Thereafter, heating is performed with the current collector 1 sandwiched between a pair of powder compacts 20, and the powder compact 20 is integrally sintered with the current collector 1 to obtain an active material layer (sintered body) 2 Thus, an electrode E was produced. When the produced electrode E was cut in the thickness direction and the cross section was observed, one active material layer 2 and the other active material layer 2 were directly connected via the opening 130.

In this example, when heating with the current collector 1 sandwiched between a pair of green compacts 20, it is sandwiched by a sandwiching jig (not shown), and in the direction of the arrow in FIG. Heating was performed at 970 ° C. for 6 hours in the atmosphere while applying a force of 5 × 10 ⁻⁴ Pa. The thickness t of each active material layer 2 was set to 60 μm (see FIG. 2B). In FIG. 2B, the metal wire 110 and the connecting member 120 are illustrated together and simplified.

  The electrode E for a lithium secondary battery described above is formed by the current collector 1 having a plurality of metal wires 110 arranged in parallel at intervals, and the electrode lead-out portion 11 extends in one direction of the active material layer 2. Each end (line piece) of the protruding metal wire 110 is configured. Therefore, when the active material powder is sintered integrally with the current collector 1 to form the active material layer 2, the electrode take-out portion is hardly distorted, and when used in a lithium secondary battery, the electrode take-out portion 11 Excellent connection workability. Further, since the active material layer forming part 12 is provided with the opening 130, the active material layers 2 can be directly connected to each other through the opening 130. Therefore, the active material layer 2 can be firmly fixed to the current collector 1, and the connecting portion also contains the active material, so that the capacity density of the electrode can be increased. Further, in the active material layer forming portion 12, since the plurality of metal wires 110 are connected and integrated with each other by the connecting member 120, the respective metal wires 110 are not separated, and the current collector made only of the metal wires 110 Compared with, the current collector 1 is easier to handle before sintering. In addition, since the distance p between the metal wires 110 is set to be not more than twice the thickness t of the active material layer 2 and the electron conduction distance is limited to the thickness of the active material layer 2, an increase in the internal resistance of the electrode is suppressed. Can do.

(Modification)
3A to 3D are plan views showing other examples of the current collector. Hereinafter, the description will focus on the differences from the current collector 1 shown in FIG.

  Current collectors 1a and 1b shown in FIGS. 3 (A) and 3 (B) are both formed only of metal wires, and unlike current collector 1, the connecting member can be omitted. Here, the current collector 1a uses a straight metal wire 110a, and the current collector 1b uses a wavy metal wire 110b. Further, the current collector 1b is formed by arranging a plurality of metal wires 110b in parallel so that the wavy wavelength and amplitude of each metal wire 110b are the same and have the same phase. May be different for any metal wire.

  The current collector 1c shown in FIG. 3C is different from the current collector 1 in that the active material layer forming portion 12 has a foil shape, and the electrode extraction portion 11 projects from the active material layer forming portion 12 in one direction. It comprises a plurality of linear pieces 111. The current collector 1c is manufactured by punching a single metal foil. In addition, the current collector 1d shown in FIG. 3D is different from the current collector 1c in that the active material layer forming portion 12 has a punching metal shape, and the active material layer forming portion 12 has a foil-like current collector 1c. Compared with, it is excellent in adhesiveness with an active material layer. The current collector 1d is formed with a large number of communication holes by punching the active material layer forming portion 12 of the current collector 1c, so that an opening 130 is provided in the active material layer forming portion 12. The shape of the opening 130 may be other than a circle.

  Each of the current collectors has a structure in which the electrode lead-out portion 11 is composed of each end portion of the plurality of metal wires 110a and 110b that are arranged at intervals and are not connected to each other, or a plurality of linear pieces 111. Therefore, when the active material layer is sintered integrally with the current collector, the electrode extraction portion 11 is hardly distorted, and the electrode extraction portion 11 is excellent in connection workability when used in a lithium secondary battery.

  Note that the present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the gist of the present invention. For example, after forming an active material layer by sintering powder of an active material integrally with a current collector, before using it in a nonaqueous electrolyte battery, each end of a plurality of metal wires constituting an electrode extraction portion ( A plurality of linear pieces) may be bundled, or the end portions (multiple linear pieces) of the plurality of metal wires may be integrated with each other by a conductive foil.

  The electrode for a non-aqueous electrolyte battery of the present invention can be suitably used in the field of non-aqueous electrolyte batteries that require connection workability of an electrode extraction portion.

It is a figure for demonstrating an example of the electrode for lithium secondary batteries which concerns on this invention, (A) is a schematic explanatory drawing which shows the preparation procedure, (B) shows the schematic perspective view, respectively. (A) is the schematic plan view which cut | disconnected the electrode shown in FIG. 1 in parallel with the collector surface, (B) is a schematic longitudinal cross-sectional view by the AA line arrow of (A). (A)-(D) are schematic plan views which show another example of a collector. It is a figure for demonstrating the electrode for the conventional lithium secondary battery, (A) is a schematic explanatory drawing which shows the preparation procedure, (B) shows the schematic perspective view, respectively.

Explanation of symbols

E electrode
1,1a, 1b, 1c, 1d, 1x current collector
11 Electrode extraction part 12 Active material layer formation part
110,110a, 110b Metal wire 111 Linear piece 120 Connecting member 130 Opening
2 Active material layer (sintered body) 20 Green compact

Claims (9)

An electrode for a non-aqueous electrolyte battery comprising a pair of active material layers containing an active material and a current collector sandwiched therebetween,
The active material layer is formed by sintering integrally with the current collector,
The current collector has an active material layer forming portion whose surface is covered with the active material layer, and an electrode extraction portion exposed from the active material layer,
The electrode extraction part is formed of a plurality of linear pieces protruding in one direction of the active material layer and arranged at intervals, and the linear pieces are not connected to each other.   The electrode according to claim 1, wherein the active material layer forming portion is provided with an opening that communicates one active material layer with the other active material layer.   The electrode according to claim 1, wherein the current collector is formed by arranging a plurality of metal wires in parallel.   The electrode according to claim 3, wherein the active material layer forming portion of the current collector is formed in a lattice shape by a connecting member arranged so as to intersect the plurality of metal wires.   5. The electrode according to claim 3, wherein an interval between the metal lines is not more than twice a thickness of the thicker one of the active material layers. A non-aqueous electrolyte battery comprising a positive electrode and a negative electrode, and an electrolyte layer interposed between the positive and negative electrodes,
The said positive electrode or negative electrode is an electrode as described in any one of Claims 1-5, The nonaqueous electrolyte battery characterized by the above-mentioned.   The nonaqueous electrolyte battery according to claim 6, wherein each linear piece of the electrode lead-out portion of the current collector is connected to a terminal of the battery by a conductive paste.   The nonaqueous electrolyte battery according to claim 6, wherein each linear piece of the electrode extraction portion of the current collector is integrally connected by a conductive foil, and the conductive foil is connected to a terminal of the battery. A method for producing a non-aqueous electrolyte battery using an electrode comprising a pair of active material layers containing an active material and a current collector sandwiched therebetween,
Using the electrode according to any one of claims 1 to 5,
A method for manufacturing a nonaqueous electrolyte battery, comprising a step of connecting a plurality of linear pieces to terminals of a nonaqueous electrolyte battery.

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