COMPOSITE METAL PRECURSOR, ELECTRODE ACTIVE MATERIAL PREPARED THEREFROM, POSITIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY INCLUDING THE SAME, AND LITHIUM SECONDARY BATTERY EMPLOYING THE SAME

摘要

Disclosed are a composite metal precursor including a composite metal hydroxide represented by the chemical formula 1 and having the content of magnesium being in the composite metal hydroxide below 0.005 wt%, an electrode active material prepared therefrom, a positive electrode for a lithium secondary battery including the same, and a lithium secondary battery employing the same. [Chemical formula 1] (A1-x-yBxCy)(OH)2 where x, y, A, B and C are as specified in the specification. [Reference numerals] (AA) Capacity (mAh);(BB) Example 1;(CC) Example 2;(DD) Example 3;(EE) Number of cycles (number of times)