METHOD FOR MANUFACTURING ALL-SOLID BATTERY

• Main Authors: FUJII SHINZO, FUJISAWA TOMOHIRO
• Format: Patent
• Language: English; Japanese
• Published: 21.06.2018
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide a method for manufacturing an all-solid battery including a laminate electrode body high in compactness without no cavity.SOLUTION: A method for manufacturing an all-solid battery having a laminate electrode body composed of an integrally sintered compact in which a positive electrode layer, a solid electrolyte layer and a negative electrode layer are laminated in this order comprises: a step (s11-s14) of preparing a solid electrolyte material sheet including solid electrolyte powder; a primary baking step (s21-s24) of obtaining a primary sintered compact by sintering a laminate arranged by holding the solid electrolyte material sheet between a negative electrode layer material sheet including a negative electrode active material and solid electrolyte powder, and a positive electrode layer material sheet including a positive electrode active material and solid electrolyte powder; a raw material solution-impregnating step (s31) of impregnating the primary sintered compact with a raw material solution including a raw material of a solid electrolyte; and a secondary baking step (s32) of sintering the primary sintered compact impregnated with the raw material solution to obtain a laminate electrode body.SELECTED DRAWING: Figure 4 【課題】空隙がなく緻密性が高い積層電極体を備えた全固体電池の製造方法を提供する。【解決手段】一体的な焼結体で正極層、固体電解質層、負極層がこの順に積層されてなる積層電極体を備えた全固体電池の製造方法であって、固体電解質の粉体を含む固体電解質材料のシートを作製するステップ（ｓ１１〜ｓ１４）と、負極活物質と固体電解質の粉体を負極層材料のシートと、正極活物質と固体電解質の粉体を含む正極層材料のシートとの間に固体電解質材料のシートを挟持してなる積層体を焼成して一次焼結体を得る一次焼成ステップ（ｓ２１〜ｓ２４）と、一次焼結体に、固体電解質の原料を含む原料溶液を含浸させる原料溶液含浸ステップ（ｓ３１）と、原料溶液を含浸させた前記一次焼結体を焼成して積層電極体を得る二次焼成ステップ（ｓ３２）を含む。【選択図】図４