NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

PURPOSE:To provide a non-aqueous electrolyte secondary battery which is safe and has a long lifetime by suppressing producing of dendrite. CONSTITUTION:A non-aqueous electrolyte secondary battery concerned includes a positive electrode chiefly containing positive electrode active material, a negative electrode whose active material is either lithium or lithium alloy, and a non-aqueous electrolytic solution. One or more of oligoethylene- oxypolyphosphazenes is added to the electrolyte.