Li-rich cathode materials with low Li₂MnO₃ and high Ni content were prepared by precipitation process to explore effects of components on electrochemical properties of the materials. The research results presented that xLi₂MnO₃·(1-x)LiNi_0.8Co_0.1Mn_0.1O₂ with appropriate x values showed excellent electrochemical properties. With the decreased Li₂MnO₃ content, the discharge capacity of the samples decreased a little but the discharge capacity attenuation and voltage decay were obviously suppressed. The discharge capacity of Li_1.167Mn_0.383Ni_0.4Co_0.05O₂ was 204.3 mAh g⁻¹ at 1.0C and the capacity retention rate was 94.7% after 50 cycles. With a moderate low Li₂MnO₃ content and proper high Ni amount, the structure transformation from layer to spinel phase during cycling was significantly reduced. The materials showed good ordered hexagonal layered structure, high rate capability, low electrochemical impedance and accelerated Li⁺ diffusion coefficient.

通过沉淀法制备了低Li ₂ MnO ₃和高Ni的富锂正极材料，以探索组分对材料电化学性能的影响。研究结果表明，具有适当x值的xLi ₂ MnO ₃ ·(1-x)LiNi _0.8 Co _0.1 Mn _0.1 O ₂表现出优异的电化学性能。随着Li ₂ MnO ₃含量的降低，样品的放电容量略有下降，但放电容量衰减和电压衰减得到明显抑制。Li _1.167 Mn _0.383的放电容量Ni _0.4 Co _0.05 O ₂在1.0C下为204.3 mAh g ^-1并且在50次循环后容量保持率为94.7%。在适度低的Li ₂ MnO ₃含量和适当的高Ni量的情况下，循环过程中从层到尖晶石相的结构转变显着减少。该材料表现出良好的有序六方层状结构、高倍率性能、低电化学阻抗和加速Li ⁺扩散系数。