MANUFACTURE OF MANGANESE DIOXIDE-LITHIUM CELL

PURPOSE:To obtain a manganese dioxide-lithium cell having good stock performance by reducing manganese dioxide under powder condition while immersing into mixed solution of ethanol and water thereby preventing voltage rise during storage. CONSTITUTION:Thermally treated manganese dioxide powder is immersed into mixture solution of ethyl alcohol and water while agitating then washed with water and dried. Positive electrode black mix mixed with manganese dioxide, phosphoric graphite and polytetra fluoro-ethylene is pressure molded while arranging stainless steel mesh to produce a molded positive electrode agent arranged at one side with stainless steel mesh. Negative electrode current collector or stainless steel mesh is spot welded to the inner face while a lithium board is pressure applied to the stainless steel mesh portion of negative electrode can fitted with a circular gasket at the circumferential folding section to form a negative electrode. A separator is mounted on the negative electrode and the electrolyte is injected to be held to the separator then molded positive electrode black mix is mounted on the separator and a positive electrode can is applied to fasten the open end portion inwardly thus to assemble a cell.