ALL-SOLID BATTERY

To provide an all-solid battery which has excellent cycle characteristics even if binding pressure applied to an electrode laminate is low.SOLUTION: An all-solid battery comprises an electrode laminate which has: a positive electrode layer; a negative electrode layer; and a solid electrolyte layer d...

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Bibliographic Details
Main Author GOTO IPPEI
Format Patent
LanguageEnglish
Japanese
Published 14.03.2023
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Summary:To provide an all-solid battery which has excellent cycle characteristics even if binding pressure applied to an electrode laminate is low.SOLUTION: An all-solid battery comprises an electrode laminate which has: a positive electrode layer; a negative electrode layer; and a solid electrolyte layer disposed between the positive electrode layer and the negative electrode layer. The electrode laminate is bound with binding pressure ranging from 0 to 2 MPa in the thickness direction. The negative electrode layer contains a negative electrode active material whose rate of volume expansion caused by charging is 105% or higher. The solid electrolyte layer contains a solid electrolyte and a binder. The ratio of the binder in the solid electrolyte layer ranges from 20 to 30 vol.%.SELECTED DRAWING: Figure 3 【課題】本開示は、電極積層体に付与される拘束圧力が低い場合であっても、良好なサイクル特性を有する全固体電池を提供することを主目的とする。【解決手段】本開示においては、正極層と、負極層と、上記正極層および上記負極層の間に配置された固体電解質層と、を有する電極積層体を備える全固体電池であって、上記電極積層体は、厚さ方向において、0MPa以上、2MPa以下の拘束圧力で拘束され、上記負極層は、充電による体積膨張率が105%以上である負極活物質を含有し、上記固体電解質層は、固体電解質およびバインダーを含有し、上記固体電解質層における上記バインダーの割合が、20体積%以上、30体積%以下である、全固体電池を提供することにより、上記課題を解決する。【選択図】図3
Bibliography:Application Number: JP20210143025