ELECTROLYTIC SOLUTION AND ELECTRODE FOR LITHIUM SECONDARY BATTERY, LITHIUM SECONDARY BATTERY, AND MANUFACTURING METHOD OF THOSE

摘要

PROBLEM TO BE SOLVED: To provide an electrolytic solution, an electrode, and a lithium secondary battery for a lithium secondary battery superior in cycle stability and with no possibility of liquid leakage, and their manufacturing method.

SOLUTION: The electrolytic solution in which isocyanate compound of a low molecular weight such as hexamethylene diisocyanate is blended, and an electrode active material are made to be reacted by a chemical method or an electrochemical method, and making a reaction layer of the low molecular weight isocyanate form on an active material surface, thereby the lithium secondary battery superior in durability is provided. A blending amount of the isocyanate compound to the electrolytic solution is within a range of 0.01 wt% to 5 wt%. After the reaction layer of the isocyanate is formed on the active material surface, or simultaneously when the reaction layer is formed, by gelatinizing the electrolytic solution in which isocyanate, polyol, and urethane formation catalyst are blended, gel electrolyte is formed.

COPYRIGHT: (C)2005,JPO&NCIPI