SINTERED BODY ELECTRODE, BATTERY MEMBER, SINTERED BODY ELECTRODE AND BATTERY MEMBER MANUFACTURING METHODS, SOLID ELECTROLYTE PRECURSOR SOLUTION, SOLID ELECTROLYTE PRECURSOR, AND SOLID ELECTROLYTE

Provided is a battery member comprising a solid electrolyte layer and a sintered body electrode layered on the solid electrolyte layer, wherein the sintered body electrode containing a carbon electrode material made of graphite or hard carbon and an alkali-ion conductive solid electrolyte. The invention further relaties to a method for manufacturing a sintered body electrode, comprising:a mixing step of mixing an alkali-ion conductive solid electrolyte precursor and a carbon electrode material precursor to obtain a mixture of the alkali-ion conductive solid electrolyte precursor and the carbon electrode material precursor, the carbon electrode material precursor being a precursor of a carbon electrode material made of graphite or hard carbon;the step of, after the mixing step, forming an electrode forming material layer containing the mixture; andthe step of firing the electrode forming material layer.