| 摘要 |
PROBLEM TO BE SOLVED: To increase safety of the battery by improving its structural stability and thermal stability. SOLUTION: Crystalline powder or quasicrystalline power represented by the following chemical formula is prepared and then coated with a metal alkoxide sol followed by heat treating to produce a positive active material for a lithium secondary battery represented by a chemical formula: LiA1-x-y Bx Cy O2 , with the surface coated with a metal oxide. In the formula, 0<x<=0.3 and 0<=y<=0.01, and A, B and C are elements selected respectively from a group of Ni, Co and Mn, a group of Ni, Co, Mn, B, Mg, Ca, Sr, Ba, Ti, V, Cr, Fe, Cu and Al, and a group of Ni, Co, Mn, B, Mg, Ca, Sr, Ba, Ti, V, Cr, Fe, Cu and Al. |
