Residual lithium compounds are harmful to the use and performance of nickel cobalt manganese ternary cathode materials, especially when the Ni content is >60%. Therefore, the residual lithium should be controlled at a reasonable level. Water washing is an effective method to remove these residual lithium compounds, but the material reacts with water during the washing process and thus its recycling performance deteriorates. In this paper, LiNi_0.83Co_0.12Mn_0.05O₂ Ni–rich cathode materials with low residual lithium content without washing were investigated. The results show that the specific discharge capacity of the unwashed samples in the first few cycles of 1C is slightly lower than that of the washed samples with the same total residual lithium content, but their cycle performance is much better. Besides, Li/Ni disorder of unwashed samples is lower than that of the washed samples. More important, after fully charged, the exothermic reaction of the unwashed sample is much slighter, which helps to improve the thermal stability of the lithium–ion batteries.

残留的锂化合物对镍钴锰三元正极材料的使用和性能有害，特别是当Ni含量> 60％时。因此，残余锂应控制在合理的水平。水洗是去除这些残留锂化合物的有效方法，但是该材料在洗涤过程中会与水反应，因此其循环性能会下降。本文中的LiNi _0.83 Co _0.12 Mn _0.05 O ₂研究了具有低残留锂含量且无需清洗的富镍正极材料。结果表明，在1C的前几个循环中，未洗涤样品的比放电容量略低于具有相同总残留锂含量的洗涤样品的比放电容量，但其循环性能要好得多。此外，未洗涤样品的Li / Ni紊乱程度低于洗涤样品。更重要的是，充满电后，未清洗样品的放热反应要小得多，这有助于改善锂离子电池的热稳定性。