MANUFACTURE OF ORGANIC ELECTROLYTE LITHIUM SECONDARY BATTERY AND COMPOSITE OXIDE OF LITHIUM AND MANGANESE

摘要

PURPOSE:To obtain excellent cycle reversibility by setting the ratio between the Li atom and Mn atom of a composite oxide of Li and Mn used as the active material of a positive electrode within a specific range. CONSTITUTION:An organic electrolyte Li secondary battery has a positive electrode using an active material made of a composite oxide of Li and Mn obtained by baking a mixture of Mn oxide (MnO2, Mn2O3 or Mn3O4) and LiNO3 in the air. The ratio between the Li atom and Mn atom of this active material must be 0.30:0.70-0.35:0.65. When the Mn oxide of the raw material is MnO2 in particular, the baking temperature is preferably 430-470 deg.C. When the Mn oxide is Mn2O3, the baking temperature is preferably 450-530 deg.C. When the Mn oxide is Mn3O4, the baking temperature is preferably 450-500 deg.C. An Li secondary battery with excellent cycle reversibility and high energy density can be obtained.