| abstract |
(57) [Summary] LiαMβN (M: transition element, 0 ≦ α ≦ 3. (0, 0.1 ≦ β ≦ 0.8) to improve the charge / discharge efficiency of a lithium secondary battery using a lithium-containing composite nitride as an electrode active material in a high-temperature environment (45 ° C. to 85 ° C.). The purpose is to: SOLUTION: An electrode composed of an electrode mixture containing a lithium-containing composite nitride, an electron conductive metal, and a binder as main components and a current collector is used. |