高镍锂离子电池三元材料NCM电解质的应用

高镍三元正极材料成本低、比容量高，符合锂离子电池可持续发展的理念，被认为是下一代的主流正极材料。但是，高镍材料需搭配合适的电解质才能有效发挥其性能，而这一研究很少被关注。因此，总结并选择适配的电解质对于高镍锂离子电池来说格外重要。本文简述了锂离子电池电解质的一般组成及其产生的电解质类型，重点综述了有机液体电解质、固体电解质及离子液体基电解质在高镍三元材料电池中的应用，并通过电解质的量化计算进行了验证总结。分析表明，离子液体-有机溶剂混合电解质在高镍三元材料（NCM）电池中具备更好的循环效果，同时满足了电池安全稳定的要求，更适合作为高镍材料电池的电解质。最后，针对混合电解质各溶剂间的相互作用机理及Li⁺传输等分子动力学研究进行了展望。

Application of NCM electrolyte for nickel-rich lithium ion battery

Nickel-rich ternary cathode materials have low cost and high specific capacity, which are suitable for the sustainable development of lithium-ion batteries and have been considered as the mainstream of next-generation cathode material. However, nickel-rich materials need to used together with suitable electrolytes to effectively give their best performance, which is however paid little attention. Selecting suitable electrolytes is particularly important for nickel-rich lithium-ion batteries. This paper briefly described the general types and composition of the electrolytes for lithium-ion battery. Next, we focused on the application of organic electrolytes, solid electrolytes and ionic liquid-based electrolytes in nickel-rich ternary material batteries, which were assessed through quantitative calculations. The results showed that the ionic liquid-organic solvent hybrid electrolyte presented very good circulation performance in nickel-rich NCM batteries, while meeting the requirements of the battery on safety and stability, and therefore was more suitable for nickel-rich NCM battery. Finally, the molecular dynamics studies on the interaction mechanism and Li⁺ transport between different solvents of hybrid electrolyte were prospected.