NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERIES, LITHIUM ION SECONDARY BATTERY, AND MANUFACTURING METHODS THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a negative electrode for lithium ion secondary batteries, which is to be used for a lithium ion secondary battery superior in initial charge and discharge efficiencies.SOLUTION: A lithium ion secondary battery comprises: a negative electrode for lithium secondary batteries or lithium ion secondary batteries; and an electrolytic solution for lithium ion secondary batteries. The negative electrode comprises a cyclic boroxine compound expressed by (RO)(RO)(RO)(BO)(where R, Rand Reach represent a carbon hydride group). For instance, the mixed amount of the cyclic boroxine is 10% or less; at least one of R, Rand Ris secondary carbon; and the cyclic boroxine compound is triisopropoxyboroxine. The electrolytic solution for lithium secondary batteries includes vinylene carbonate.