Electrode, power storage device, and electronic equipment
First Claim
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1. An electrode comprising:
- a stack comprising a current collector, an active material layer, and a friction layer,wherein the stack includes a first portion, a second portion, and a third portion connected to the first portion and the second portion,wherein the stack is curved in the third portion so that the first portion faces the second portion,wherein the active material layer is in contact with a first surface of the current collector, and a second surface of the current collector is in contact with a first surface of the friction layer,wherein the friction layer is curved in the third portion so that a second surface of the friction layer included in the first portion is in contact with the second surface of the friction layer included in the second portion, andwherein a coefficient of static friction between the second surface of the friction layer included in the first portion and the second surface of the friction layer included in the second portion is smaller than a coefficient of static friction between the second surface of the current collector included in the first portion and the second surface of the current collector included in the second portion, wherein the coefficient of static friction between the friction layer included in the first portion and the friction layer included in the second portion is less than or equal to 0.05.
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Abstract
A flexible power storage device or a power storage device of which the capacity and cycle characteristics do not easily deteriorate even when the power storage device is curved is provided. An electrode in which an active material layer, a current collector, and a friction layer are stacked in this order is provided. Furthermore, a power storage device that includes the electrode as at least one of a positive electrode and a negative electrode is provided.
21 Citations
18 Claims
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1. An electrode comprising:
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a stack comprising a current collector, an active material layer, and a friction layer, wherein the stack includes a first portion, a second portion, and a third portion connected to the first portion and the second portion, wherein the stack is curved in the third portion so that the first portion faces the second portion, wherein the active material layer is in contact with a first surface of the current collector, and a second surface of the current collector is in contact with a first surface of the friction layer, wherein the friction layer is curved in the third portion so that a second surface of the friction layer included in the first portion is in contact with the second surface of the friction layer included in the second portion, and wherein a coefficient of static friction between the second surface of the friction layer included in the first portion and the second surface of the friction layer included in the second portion is smaller than a coefficient of static friction between the second surface of the current collector included in the first portion and the second surface of the current collector included in the second portion, wherein the coefficient of static friction between the friction layer included in the first portion and the friction layer included in the second portion is less than or equal to 0.05. - View Dependent Claims (2, 3, 4)
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5. A power storage device comprising:
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a first electrode; a second electrode; an electrolytic solution; and a separator between the first electrode and the second electrode, wherein the first electrode comprises a stack comprising a current collector, an active material layer, and a friction layer which is not the separator, wherein the stack includes a first portion, a second portion, and a third portion connected to the first portion and the second portion, wherein the stack is curved in the third portion so that the first portion faces the second portion, wherein the active material layer is in contact with a first surface of the current collector, and a second surface of the current collector is in contact with a first surface of the friction layer, wherein the friction layer is curved in the third portion so that a second surface of the friction layer included in the first portion is in contact with the second surface of the friction layer included in the second portion, wherein a coefficient of static friction between the second surface of the friction layer included in the first portion and the second surface of the friction layer included in the second portion is smaller than a coefficient of static friction between the second surface of the current collector included in the first portion and the second surface of the current collector included in the second portion, wherein the first electrode is configured to operate as one of a positive electrode and a negative electrode, and wherein the second electrode is configured to operate as the other of the positive electrode and the negative electrode, wherein the coefficient of static friction between the friction layer included in the first portion and the friction layer included in the second portion is less than or equal to 0.05. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification