Patent ID: 9005824
Filing Date: 2015-04-14
Classification: H01M,Y02E,Y02P

Abstract:
1. A lithium secondary battery, comprising a positive electrode, a negative electrode, a nonaqueous electrolyte liquid and a separator, subjected to a constant-current constant-voltage charge is applied with a stop voltage of more than 4.25V before using, wherein the nonaqueous electrolyte liquid used in the lithium secondary battery contains 0.1 to 5 mass % of a phosphonoacetate compound represented by General Formula (1), and 0.1 to 5 mass % of 1,3-dioxane: where in General Formula (1), each of R 1 , R 2 and R 3 is independently hydrocarbon groups having a carbon number of 1 to 12 with or without substituent of a halogen atom, and n is 0 to 6 integers.