Ni-rich layered LiNi_0.9Co_0.1O₂ cathode materials have been prepared by co-precipitation and solid-state reaction, and the effect of calcination temperature and Li/M molar ratio on the structure and electrochemical performance is systematically investigated. Sample fired at 730 °C with Li/M = 1.03 provided the best structural and electrochemical performance. The optimized sample delivered 220 mAh g^-1 discharge capacity at 0.1C, and 92.5% capacity retention after 50 cycles at 1C along with better rate capability (192 mAh g^-1 discharge capacity at 2C). Such excellent performance is possibly attributed to the uniform clean spherical particles and well-developed layered structure with low cation mixing.

通过共沉淀和固相反应制备了富镍层状LiNi _0.9 Co _0.1 O ₂正极材料，系统地研究了煅烧温度和Li / M摩尔比对结构和电化学性能的影响。在730°C且Li / M = 1.03的条件下燃烧的样品提供了最佳的结构和电化学性能。优化的样品在0.1C时可提供220 mAh g ^-1的放电容量，在1C时经过50次循环后可保持92.5％的容量，并具有更高的倍率性能（2C时的放电容量为192 mAh g ^-1）。如此优异的性能可能归因于均匀的清洁球形颗粒和低阳离子混合的发达层状结构。