IRREVERSIBLE ADDITIVE, CATHODE MATERIAL COMPRISING IRREVERSIBLE ADDITIVE, AND LITHIUM SECONDARY BATTERY COMPRISING CATHODE MATERIAL

摘要

The present invention relates to: an irreversible additive having a trigonal crystal structure and comprising a coating layer including an oxide represented by chemical formula 1 and a compound positioned on the surface of the oxide and represented by chemical formula 2; a cathode material comprising the irreversible additive; and a lithium secondary battery comprising the cathode material.