Layered nickel-rich ternary materials LiNi_xCo_yMn_1-x-yO₂ have been deemed as the most practical candidates in the power battery industry on account of their high capacity and low cost. In the study, we investigated the modifying impacts of Y(PO₃)₃ on structure and electrochemical properties of LiNi_0.6Co_0.1Mn_0.3O₂ (NCM613) material. The characterization results show that trace amounts of yttrium may be incorporated into the crystals of NCM613 material, and the remaining Y(PO₃)₃ reacted with the surface residual lithium to produce a hybrid YPO₄-Li₃PO₄-Y(PO₃)₃ coating layer on the surface of NCM613 grains. The modified-NCM613 with 0.3 wt% Y(PO₃)₃ presents high initial discharge specific capacities of 181.3 mAh g⁻¹ and 196.0 mAh g⁻¹ in 2.8–4.5 V (vs Li/Li⁺) at 1C under 25 °C and 45 °C, and maintains 87.2% and 82.1% retentions after 100 cycles, higher than those of the unmodified NCM613 (71.8% and 65.8%). The improved electrochemical performance of 0.3 wt% Y(PO₃)₃ modified-NCM613 results from dual functions of Y³⁺ doping and the hybrid YPO₄-Li₃PO₄-Y(PO₃)₃ coating. The Y³⁺ doping can improve lithium ion diffusion rate and promote the layered structural stability. The hybrid coating suppresses the corrosion of electrolyte to the cathode material in cycles.

层状富镍三元材料LiNi _x Co _y Mn _1-xy O ₂因其高容量和低成本被认为是动力电池行业最实用的候选材料。在这项研究中，我们研究了 Y(PO ₃ ) ₃对 LiNi _0.6 Co _0.1 Mn _0.3 O ₂ (NCM613) 材料结构和电化学性能的影响。表征结果表明，NCM613材料的晶体中可能含有微量的钇，其余的Y(PO ₃ ) ₃与表面残留的锂反应，在NCM613晶粒表面产生杂化YPO ₄ -Li ₃ PO ₄ -Y(PO ₃ ) ₃涂层。具有 0.3 wt% Y(PO ₃ ) ₃的改性 NCM613在 25°C、1C 、2.8-4.5 V（vs Li/Li ⁺）中具有 181.3 mAh g ^-1和 196.0 mAh g ^{-1 的}高初始放电比容量和 45 °C，并在 100 次循环后保持 87.2% 和 82.1% 的保留率，高于未修饰的 NCM613（71.8% 和 65.8%）。0.3 wt% Y(PO ₃ ) ₃改善的电化学性能改性NCM613 由Y ³⁺掺杂和混合YPO ₄ -Li ₃ PO ₄ -Y(PO ₃ ) ₃涂层的双重功能产生。Y ³⁺掺杂可以提高锂离子扩散速率，促进层状结构的稳定性。混合涂层可抑制电解液在循环中对阴极材料的腐蚀。