Positive electrode for a lithium battery

摘要

A method for producing a lithium alkali transition metal oxide for use as a positive electrode material for lithium secondary batteries by a precipitation method. The positive electrode material is a lithium alkali transition metal composite oxide and is prepared by mixing a solid state mixed with alkali and transition metal carbonate and a lithium source. The mixture is thermally treated to obtain a small amount of alkali metal residual in the lithium transition metal composite oxide cathode material.

主权项

1. A cathode material of general formula
xLiAa′NiαCoβMnγMoδMyO2.(1−x)Li2MnyO3 wherein: the LiAa′NiαCoβMnγMoδMyO2 and Li2MnγO3 components form a layered structure;
A is Na, K, or a mixture of Na and K; M is Mg, Zn, Al, Ga, B, Zr, Si, Ti, Nb, W, or a mixture of any two or more thereof;
X is F, S, Cl, I, or a mixture of any two or more thereof;x ranges from 0 to 1;a′ ranges from 0.01 to about 0.1;α ranges from 0.01 to 1;β ranges from 0 to 1;γ ranges from 0.01 to 1;δ ranges from 0 to 0.2; andy ranges from 0 to 0.15.