COMPOSITE CATHODE FOR ELECTROCHEMICAL CELL

摘要

A composite cathode for a solid state electrochemical cell is made by forming a sheet or film from a solution of an insertion electrode material (e.g. V6O13) and a polymeric material (e.g. (PEO)xLiF3CSO3), e.g. by solution casting. The sheet or film is subjected to densification by application of pressure thereto (e.g. by rolling) and assembled into a cell in conjunction with an anode having lithium as its active material and an electrolyte comprising a polymeric material capable of forming a complex with a Li salt, a Li salt being complexed with a polymeric material to form an ionically conducting phase in one or both of the composite cathode and the electrolyte. The overall volumetric energy density and capacity retention of the cell are thereby enhanced.