NONAQUEOUS ELECTROLYTE SECONDARY CELL

摘要

PURPOSE:To obtain a highly reliable manganese dioxide nonaqueous electrode secondary cell having low cycle deterioration even upon repetition of charge/ discharge cycle by employing positive electrode active substance where an oxide to be shown by general formula xM2O5.yMO3 (where, M=aV+bMo+cW, a+b+c=1) is adhered onto MnO2 particle surface with M-Mn atomic ratio within 0.02-0.2. CONSTITUTION:gamma type MnO2 30.00g and V2O5 1.569g (V/Mn=0.05) are contained together with water 15cc into a container then mixed sufficiently to produce paste which is preliminary dried under the temperature of 80 deg.C then further dried under the temperature of 250 deg.C. Consequently, V2O5 will adhere uniformly onto the surface of MnO2 particles especially to the recess of MnO2. When charging/discharging such a cell with constant current of 2mA under the voltage within 2.0-3.8V, the cycle deterioration will be 3-10 times when compared with a cell simply employing a compound.