MANUFACTURING METHOD OF ALL-SOLID BATTERY, AND ALL-SOLID BATTERY

To provide a manufacturing method of an all-solid battery which can suppress cracking at the ends of electrodes even when a negative electrode active material layer containing lithium titanium oxide is roll-pressed.SOLUTION: In a manufacturing method of an all-solid battery 200, which includes roll-pressing negative electrode active material layers 4a and 4b to consolidate the negative electrode active material layers, in the all-solid battery 200, positive electrode current collector layers 1a and 1b, positive electrode active material layers 2a and 2b, solid electrolyte layers 3a and 3b, negative electrode active material layers 4a and 4b, and a negative electrode current collector layer 5a are laminated in this order, and the negative electrode active material layers 4a and 4b include a lithium titanium oxide as a negative electrode active material, and the stress relaxation rate of the negative electrode active material layers 4a and 4b before roll pressing is 32.5% or more.SELECTED DRAWING: Figure 3 【課題】リチウムチタン酸化物を含む負極活物質層をロールプレスしても、電極の端部の割れを抑制できる全固体電池の製造方法の提供。【解決手段】負極活物質層４ａ，４ｂをロールプレスして圧密化することを含む全固体電池２００の製造方法であって、全固体電池２００は、正極集電体層１ａ，１ｂ、正極活物質層２ａ，２ｂ、固体電解質層３ａ，３ｂ、負極活物質層４ａ，４ｂ、及び負極集電体層５ａがこの順に積層されてなる構成を有しており、負極活物質層４ａ，４ｂは、負極活物質としてリチウムチタン酸化物を含み、かつロールプレスをする前の負極活物質層４ａ，４ｂの応力緩和率が３２．５％以上である。【選択図】図３