Patent ID: 8877389
Filing Date: 2014-11-04
Classification: H01M,Y02E,Y02T

Abstract:
1. A lithium secondary cell comprising a negative electrode, a non-aqueous electrolytic solution and a positive electrode, wherein an active material for the negative electrode comprises lithium titanate, the non-aqueous electrolytic solution comprises an electrolyte salt and a solvent for dissolving the electrolyte salt and said solvent for dissolving the electrolyte salt comprises at least one fluorine-containing solvent (I) and other carbonate (II), the at least one fluorine-containing solvent (I) is selected from the group consisting of a fluorine-containing ether, a fluorine-containing ester, a fluorine-containing chain carbonate and a fluorine-containing cyclic carbonate, and the fluorine-containing chain carbonate is represented by the formula (IC): wherein Rf