Patent ID: 6114070
Filing Date: 2000-09-05
Classification: H01M,Y02E

Abstract:
A lithium secondary battery comprising a nonaqueous electrolyte obtained by dissolving an electrolytic salt in a solvent, a negative electrode comprising a negative electrode material and a positive electrode comprising a positive electrode active material,said electrolytic salt comprising:at least one electrolytic salt A selected from the group consisting of LiPF.sub.6, LiAsF.sub.6, LiSbF.sub.6, LiBF.sub.4, LiBiF.sub.4, LiAlF.sub.4, LiGaF.sub.4, LiInF.sub.4 and LiClO.sub.4, andat least one electrolytic salt B selected from the group consisting of LiN(C.sub.n F.sub.2n+1 SO.sub.2).sub.2 wherein n is an integer of 2, 3 or 4 and LiC(C.sub.m F.sub.2m+1 SO.sub.2).sub.3 wherein m is an integer of 2, 3 or 4, andsaid solvent being a mixed solvent comprising at least one cyclic carbonate and at least one linear carbonate in a volume ratio ranging from 4:1 to 1:4.