Electrode applied to solid-state battery and solid-state battery

A technology of solid batteries and solid electrolytes, applied in battery electrodes, solid electrolytes, positive electrodes, etc., can solve problems such as hindering ion conduction, and achieve high reliability

Pending Publication Date: 2022-04-12
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, it is known that with respect to lithium-containing electrode active materials, lithium ions are injected and released as charging and discharging occur, and in this case, the volume of the electrode active material layer expands and contracts, and in the electrode active material containing electrode active material Cracks develop in the electrode layer, which impedes ion conduction

Method used

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  • Electrode applied to solid-state battery and solid-state battery
  • Electrode applied to solid-state battery and solid-state battery
  • Electrode applied to solid-state battery and solid-state battery

Examples

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no. 1 example

[0036] The positive electrode including the positive electrode active material layer 20 will be described as an electrode according to the first embodiment. Figure 1A is a cross-sectional structural view illustrating the positive electrode 30 according to the first embodiment of the present implementation, Figure 1B It is a graph illustrating the volume fraction distribution of components contained in the positive electrode active material layer 20 in the layer thickness direction 220 .

[0037] Such as Figure 1A As shown, the positive electrode 30 includes a current collector layer 10 and an active material layer 20 including a positive electrode active material 120 and a solid electrolyte 140 . The active material layer 20 may also be called a composite active material layer.

[0038] The current collector layer 10 is a conductor that conducts electron conduction between an unillustrated external circuit and the active material layer. For the collector layer 10 , a self-...

no. 2 example

[0048] This embodiment is an embodiment in which the positive electrode 30 of the first embodiment is used to form the solid battery 100 . In other words, the positive electrode 30 according to the first embodiment is applied to the positive electrode of the solid battery 100 . The solid battery 100 includes the solid electrolyte layer 40 on the surface opposite to the collector layer 10 side of the cathode active material layer 20 . The solid battery 100 includes the negative electrode 70 on the side opposite to the side in contact with the positive electrode active material layer 20 of the solid electrolyte layer 40 . The negative electrode 70 includes the negative electrode active material layer 50 on the side opposite to the side in contact with the positive electrode active material layer 20 of the solid electrolyte layer 40 . The negative electrode 70 includes the negative electrode collector layer 60 on the side opposite to the side in contact with the solid electrolyt...

no. 3 example

[0054] The positive electrode 30 according to this embodiment is different from the positive electrode 30 according to the first embodiment. The volume fraction distribution of the positive electrode active material 120 and the solid electrolyte 140 contained in the positive electrode active material layer 20 in the stacking direction 200 is as follows: Figure 3Ashown. Except that even in the positive electrode active material layer 20a closest to the current collector layer 10, the volume fraction of the positive electrode active material 120 (LCO) is lower than that of the solid electrolyte 140 (LBO), the positive electrode according to this embodiment Active material layer 20 is the same as in positive electrode 30 according to the first embodiment. Regarding the solid battery using the positive electrode 30 according to the present embodiment, as in the first embodiment, the influence of cracks or the like due to the volume change of the positive electrode active material...

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Abstract

An electrode applied to a solid-state battery in which a current collector layer and an active material layer are laminated, and the active material layer is in partial contact with the current collector layer and contains an active material having a concentration distribution in the layer thickness direction, in which the active material layer contains one of a conductive auxiliary agent and a solid electrolyte, the concentration gradient of the conductive auxiliary agent is decreased progressively, and the concentration gradient of the solid electrolyte is increased progressively towards the side in contact with the current collector layer in the layer thickness direction.

Description

technical field [0001] The present invention relates to a solid battery comprising a solid electrolyte. In particular, the present invention relates to an electrode structure applied to a positive electrode or a negative electrode of a solid battery. Background technique [0002] A lithium secondary battery is a secondary battery composed of lithium transition metal oxides such as lithium cobaltate as the positive electrode material, graphite-based carbon material as the negative electrode material, and an organic electrolyte, and transfers lithium ions from the positive electrode to the battery during charging. The negative electrode and the transfer of lithium ions from the negative electrode to the positive electrode during discharge function as a battery. Lithium secondary batteries are widely used as batteries for mobile devices because they can output a much larger amount of electricity in terms of volume or weight (energy density) of the battery compared to other sec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/131H01M4/36H01M4/52H01M10/0525H01M10/0562
CPCH01M4/525H01M10/0562H01M2004/021H01M4/625H01M2300/0068H01M2004/028H01M10/0585H01M2300/0071
Inventor 久保健太
Owner CANON KK
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