中文摘要：

在恒定pH值下将层状钴铝双羟基复合金属氧化物（CoAl—LDH）均匀包覆在球状Ni（OH）2表面，与LiOH·H2O混合均匀后，经高温煅烧制得钻铝酸锂包覆镍酸锂0．08LiCo0．75A10．2502-0．92LiNiO2正极材料．电化学测试表明，0．08LiCo0．75A10．2502-0．92LiNiO2正极比容量高，具有良好的倍率性能和循环寿命，其0．1C放电比容量为2mAh·g^-1，0．5C放电比容量为195．6mAh·g^-1，3C放电比容量为161mAh·g^-1，0．5C30周期循环后容量保持率为93．2％，明显优于LiNiO2和钴酸锂包覆镍酸锂0．08LiCoO2-0．92LiNiO2正极．

英文摘要：

CoA1-LDH or Co （OH）2 coated spherical Ni （OH）： precursors were obtained via a coprecipitation method at a constant pH. The mixtures of the precursors and LiOH-H： O were annealed at high temperature in O2 atmosphere, and then the cathode materials of 0. 08LiCo0. 75 Al0.25 Oa-0. 92LiNiO2, 0. 08LiCoO2-0.92 LiNiO2 and LiNiO： were synthesized. Effects of the coating layer were also studied. The results showed that the 0.08LiCoo 75Alo 25 024）. 92LiNiO： material possessed the best rate and cycle life performance. The dischar-ging capacities at 0.1 C, 0.5 C and 3 C were 211 mAh·g^-1, 195.6 mAh·g^-1 and 161 mAh·g^-1 respectively, and the capacity retention ratio after 30 cycles at 0.5C was 93.2%. These performances were much better than those of both pure LiNiO： and 0.08LiCoO2-0.92LiNiO2.