Surface coating is a useful strategy to enhance the cycling stability of cathode materials. Achieving superior rate capability at the same time, however, is still a challenge. In this work, the zeolitic imidazolate framework-8 (ZIF-8), one of metal-organic framework material, is initially coated on the surface of LiNi_1/3Co_1/3Mn_1/3O₂ (NCM₃₃₃). After ZIF-8 coating, the cycling stability and rate capability of NCM₃₃₃@ZIF-8 are simultaneously improved in comparison with that of NCM₃₃₃. A high capacity retention ratio of 81.4% is achieved after 300 cycles at 800 mA g⁻¹, which is much larger than that of NCM₃₃₃ (41.2%). Even at an elevated temperature (55 °C), the cycling stability of NCM₃₃₃@ZIF-8 is still excellent. In addition, a high capacity of 122 mA h g⁻¹ is obtained at a high current density of 1200 mA g⁻¹. The enhanced performances are highly related with the unique properties of permanent porosity, exceptional thermal and chemical stability and the high ionic conductivity (3.16 × 10⁻⁴ S cm⁻¹) of ZIF-8 that not only acts as a shield for NCM₃₃₃ against the electrolyte corrosion, but also enables faster lithium-ion transfer at the interfacial regions. The current work offers guidance for improving the overall electrochemical performance of electrode materials in lithium-ion batteries.

表面涂层是增强阴极材料循环稳定性的有用策略。然而，同时实现卓越的速率能力仍然是一个挑战。在这项工作中，将沸石-咪唑骨架8（ZIF-8）（一种金属有机骨架材料）首先涂覆在LiNi _1/3 Co _1/3 Mn _1/3 O ₂（NCM ₃₃₃）的表面上。ZIF-8涂布后，NCM的循环稳定性和倍率性能₃₃₃ @ ZIF-8在与该NCM的比较同时也能改善₃₃₃。在800 mA g ^-1下进行300次循环后，可实现81.4％的高容量保持率，这比NCM _333的容量保持率大得多（41.2％）。即使在高温（55°C）下，NCM ₃₃₃ @ ZIF-8的循环稳定性仍然非常出色。此外，122毫安ħg的高容量^-1是在1200毫安g的高电流密度下得到的^-1。增强的性能与永久孔隙率，卓越的热稳定性和化学稳定性以及ZIF-8的高离子电导率（3.16×10 ^-4  S cm ^-1）的独特性能高度相关，ZIF-8不仅可作为NCM ₃₃₃的屏蔽不仅可以防止电解质腐蚀，还可以在界面区域更快地转移锂离子。当前的工作为改善锂离子电池中电极材料的整体电化学性能提供了指导。