METHOD OF MANUFACTURING SOLID ELECTROLYTE SHEET, AND SOLID ELECTROLYTE SHEET

Provided is a method of manufacturing a solid electrolyte sheet, and a solid electrolyte sheet that can improve battery output performance, and can suppress interfacial peeling and short-circuiting between the solid electrolyte layer and the electrode layer. A method of manufacturing a solid electrolyte sheet includes: a first step of a base with coating slurry containing a solid electrolyte; a second step of drying the slurry on the base to form a solid electrolyte layer; a third step of stacking a sheet-like three-dimensional structure on the top surface of the solid electrolyte layer; a fourth step of coating the inside and top of the three-dimensional structure with slurry containing a solid electrolyte; and a fifth step of drying the slurry coated on the inside and on the top of the three-dimensional structure to obtain a solid electrolyte sheet filled with the solid electrolyte.