CATHODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY USING THE SAME

摘要

PROBLEM TO BE SOLVED: To realize both high charge-discharge capacity and cycle characteristics, and to increase volume energy density in a secondary battery.SOLUTION: An embodiment utilizes a cathode active material for a nonaqueous electrolyte secondary battery, which contains tungsten in an amount from 0.1 mol% to 5.0 mol% inclusive in a lithium transition metal composite oxide represented by the general formula xLiMnO.(1-x)LiNiCoMnO, where 0.3≤x≤0.7, 0