Li-rich layered oxide materials have attracted increasing attention because of their high specific capacity (>250 mAh g⁻¹). However, these materials typically suffer from poor cycling stability and low rate performance. Herein, we propose a facile and novel metal-organic-framework (MOF) shell-derived surface modification strategy to construct NiCo nanodots decorated (∼5 nm in diameter) carbon-confined Li_1.2Mn_0.54Ni_0.13Co_0.13O₂ nanoparticles ([email protected]&NiCo). The MOF shell is firstly formed on the surface of as-prepared Li_1.2Mn_0.54Ni_0.13Co_0.13O₂ nanoparticles via low-pressure vapor superassembly and then is in situ converted to the NiCo nanodots decorated carbon shell after subsequent controlled pyrolysis. The obtained [email protected]&NiCo cathode exhibits enhanced cycling and rate capability with a capacity retention of 95% after 100 cycles at 0.4 C and a high capacity of 159 mAh g⁻¹ at 5 C, respectively, compared with those of LLO (75% and 105 mAh g⁻¹). The electrochemical impedance spectroscopy and selected area electron diffraction analyses after cycling demonstrate that the thin C&NiCo shell can endow LLO with high electronic conductivity and structural stability, indicating the undesired formation of the spinel phase initiated from the particle surface is efficiently suppressed. Therefore, this presented strategy may open a new avenue on the design of high-performance electrode materials for energy storage.

富锂层状氧化物材料因其高比容量（>250 mAh g ^-1）而受到越来越多的关注。然而，这些材料通常具有较差的循环稳定性和低倍率性能。在此，我们提出了一种简便且新颖的金属有机骨架 (MOF) 壳衍生表面改性策略，以构建 NiCo 纳米点装饰（直径约 5 nm）碳限制的 Li _1.2 Mn _0.54 Ni _0.13 Co _0.13 O ₂纳米粒子（[电子邮件保护]&NiCo)。MOF壳层首先在所制备的Li _1.2 Mn _0.54 Ni _0.13 Co _0.13 O _{2表面形成}纳米粒子通过低压蒸汽超组装，然后在随后的受控热解后原位转化为 NiCo 纳米点装饰的碳壳。与 LLO （⁷⁵ % 和 105 mAh g ⁻¹). 循环后的电化学阻抗谱和选区电子衍射分析表明，薄的 C&NiCo 壳可以赋予 LLO 高电子导电性和结构稳定性，表明从颗粒表面引发的尖晶石相的不良形成得到有效抑制。因此，该策略可能为高性能储能电极材料的设计开辟一条新途径。