LITHIUM SECONDARY BATTERY

摘要

PURPOSE:To prevent decreased changing/discharging reaction of a battery by generating an oxidized film on a negative electrode with an electrolyte oxidation decomposed when the battery is overchanged, in the battery using vanadium pentoxide in its positive electrode. CONSTITUTION:A lithium secondary battery is constituted of a positive electrode 4 formed of vanadium pentoxide, negative electrode 5 formed of a compound of lithium and niobium pentoxide and an electrolyte using lithium salt fused in an organic system mixed solvent. This organic system mixed solvent is constituted of a solvent of two components or more with 1,2-diethoxyethane or diethylene carbonate serving as one component, also to form its lithium salt by lithium perfluoromethyl sulfonylimide LiN (CF3SO2)2.