POSITIVE ELECTRODE AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

There is prepared a material (hereinafter referred to a positive electrode material) containing a sodium manganate powder as positive electrode active material, a carbon black powder as conductive agent and a polytetrafluoroethylene as binder. A slurry as positive electrode mix is obtained by mixing the positive electrode material with an N-methylpyrrolidone solution. A working electrode is formed by applying this slurry onto a positive electrode collector. There is also formed a negative electrode which contains tin or germanium. An electrolyte obtained by adding sodium hexafluorophosphate as electrolyte salt in a nonaqueous solvent wherein an ethylene carbonate and a diethyl carbonate are mixed is used as nonaqueous electrolyte.