| 摘要 |
A method for preparing Li<SUB>1+x</SUB>Ni<SUB>1-y</SUB>Co<SUB>y</SUB>O<SUB>2 </SUB>cathode materials is disclosed, wherein -0.2□x□0.2 and 0.05□y□0.5. The method includes the following steps: (A) adding a first solution into a second solution thereby to form a mixed solution, wherein the first solution is a saturated lithium hydroxide solution, the mole ratio of the Li ion in the first solution to Ni ion and Co ion in the second solution ranges from 1.5:1 to 5:1, and the molar ratio of Ni ion to Co ion is 1-y:y; (B) stirring the mixed solution; (C) filtering the mixed solution and obtaining a co-precipitated precursor, wherein the molar ratio of lithium ion:nickel ion:cobalt ion is 1+x:1-y:y; and (D) heating the co-precipitated precursor at a temperature higher than 600□.
|
