ADDITIVE FOR NON-AQUEOUS LIQUID ELECTROLYTE SECONDARY CELL, NON-AQUEOUS LIQUID ELECTROLYTE SECONDARY CELL, ADDITIVE FOR NON-AQUEOUS LIQUID ELECTROLYTE ELECTRIC DOUBLE LAYER CAPACITOR AND NON-AQUEOUS LIQUID ELECTROLYTE ELECTRIC DOUBLE LAYER CAPACITOR

摘要

An additive for a non-aqueous liquid electrolyte secondary cell or a non- aqueous liquid electrolyte electric double layer capacitor, characterized in that it comprises a phosphazene derivative represented by the following general formula (1): (PNF2)n, wherein n represents 3 to 14; and a non-aqueou s liquid electrolyte secondary cell or a non-aqueous liquid electrolyte electr ic double layer capacitor, characterized in that it has a non-aqueous liquid electrolyte electric double layer capacitor, characterized in that it has a non-aqueous liquid electrolyte comprising a supporting electrolyte and the additive for a non-aqueous liquid electrolyte secondary cell, a positive electrode and a negative electrode.