A method for preparing Li1+xNi1−yCoyO2 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□.
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机译：公开了一种制备Li 1 + x Ni 1-y Co y O 2 阴极材料的方法，其中−0.2□x□0.2和0.05□y□0.5。该方法包括以下步骤：（A）将第一溶液添加到第二溶液中以形成混合溶液，其中第一溶液是饱和氢氧化锂溶液，第一溶液中的锂离子与镍离子的摩尔比。第二溶液中的Co离子为1.5：1至5：1，Ni离子与Co离子的摩尔比为1-y：y。 （b）搅拌混合溶液; （C）过滤混合溶液，得到共沉淀的前驱体，其中锂离子：镍离子：钴离子的摩尔比为1 + x：1-y：y。 （D）在高于600℃的温度下加热共沉淀的前体。
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