Abstract: 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.

Abstract: There is provided a solid-state battery which can prevent short circuiting or breakage from occurring in electrode layers in individual laminates due to rolling when the stacked laminates are subjected to a high-pressure pressing process. A solid-state battery includes a laminate in which a positive electrode collector, a positive electrode active material layer, a solid electrolyte layer, a negative electrode active material layer, and a negative electrode collector are stacked in this order, and a conductive rigid body including a rigid body having electrical conductivity, wherein the laminate and the conductive rigid body are alternately stacked, and the conductive rigid body is provided on each outermost side in a stacking direction.

Abstract: Provided are a method and an apparatus for manufacturing a battery component including a base having a three-dimensional structure at low manufacturing costs, the method and the apparatus enabling impregnation of the base with a solid electrolyte of uniform composition while preventing or inhibiting air from remaining inside the base. A method of manufacturing a battery component, including: a first step of positioning a base having a three-dimensional structure in an impregnation tank; and a second step of feeding a solid electrolyte slurry to the base positioned in the impregnation tank while keeping the solid electrolyte slurry flowing, thereby impregnating the base with the solid electrolyte slurry.

Abstract: This product management method manages, by a computer, a membrane electrode assembly 21 and a fuel cell stack which are manufactured through a joining step S8 of joining electrode catalyst layers 25a, 26a to gas diffusion layers 25b, 26b that use carbon paper as a base material. The product management method is provided with: steps (S2, S5) of obtaining primary feature vector data by capturing an image at a specific site of each of a plurality of gas diffusion layers and storing the obtained primary feature vector data into a storage medium; and steps (S9, S11, S12) of comparing the feature vector data, which is obtained by capturing the image at the specific site of each of the gas diffusion layers that have undergone the steps (S2, S5), with a management database stored in the storage medium.