Patent ID: 8592090
Filing Date: 2013-11-26
Classification: B82Y,H01M,Y02E,Y10T

Abstract:
1. A solid polymer electrolyte battery in which a solid polymer electrolyte is interposed between a positive electrode material and a negative electrode material, wherein positive electrode active material particles that constitute a positive electrode have surfaces at least partially coated by an attachment that has ionic conductance and electronic conductance and is not oxidized even when supplied with oxygen from a positive electrode active material, and at least part of the surface of the active material particles is in a state in which there is no direct contact with the solid polymer electrolyte, wherein said attachment consists only of: microparticles of an inorganic solid electrolyte comprising lithium, phosphorous and oxygen; and microparticles of a conducting material that has electronic conductance, wherein the microparticles of the inorganic solid electrolyte have a grain size that is about ⅓ or less of the grain size of the positive electrode active material particles, so as to suppress oxidative decomposition of the solid polymer electrolyte.