NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

PURPOSE:To enhance the cyclic characteristics by lessening the rate of capacity deterioration in association with propagation of the charge/discharge cycles. CONSTITUTION:A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode made of a carbon material whose d-value (d002) at the lattice plane (002) is below 3.37Angstrom , and a non-aqueous electrolytic solution where pyridine or its derivative is added in an amount 0.1-1wt.%. Decomposition of the electrolytic solution at the surface of carbon material is suppressed by a film of pyridine or its derivative produced in adsorption to the surface of the carbon material.