Ni-rich LiNi_1–x–yMn_xCo_yO₂ (NMC: 1–x–y ≥ 0.6) are promising cathode materials for lithium-ion batteries (LIBs) due to their high reversible capacity and low cost. However, the fast capacity decay and voltage fading caused by interphasial instability require improvement. The unstable cathode–electrolyte interphase (CEI) and transition metal dissolution at higher voltages can lead to the drastic deterioration of electrochemical performance. In this review, recent approaches to novel electrolyte and additive design, cathode engineering including artificial CEI, and doping/coating on the surface of particles or the whole electrode are comprehensively summarized. The importance of multimodel and multiscale characterization methods in understanding the effects of interphasial chemistry on battery performance is highlighted.

富镍 LiNi _1–x–y Mn _x Co _y O ₂ (NMC: 1–x–y≥ 0.6）由于其高可逆容量和低成本而成为有前途的锂离子电池（LIB）正极材料。然而，由相间不稳定性引起的快速容量衰减和电压衰减需要改进。较高电压下不稳定的阴极电解质界面（CEI）和过渡金属溶解会导致电化学性能急剧恶化。在这篇综述中，全面总结了新型电解质和添加剂设计、包括人工CEI在内的阴极工程以及颗粒或整个电极表面的掺杂/涂层的最新方法。强调了多模型和多尺度表征方法在理解相间化学对电池性能的影响方面的重要性。