The requirement of energy storage equipment need to develop the lithium ion battery (LIB) with high electrochemical performance. The surface modification of commercial LiFePO₄ (LFP) by utilizing zeolitic imidazolate frameworks-8 (ZIF-8) offers new possibilities for commercial LFP with high electrochemical performances. In this work, the carbonized ZIF-8 (C_ZIF-8) was coated on the surface of LFP particles by the in-situ growth and carbonization of ZIF-8. Transmission electron microscopy (TEM) indicates that there is an approximate 10 nm coating layer with metal zinc and graphite-like carbon on the surface of LFP/C_ZIF-8 sample. The N₂ adsorption and desorption isotherm suggests that the coating layer has uniform and simple connecting mesopores. As cathode material, LFP/C_ZIF-8 cathode active material delivers a discharge specific capacity of 159.3 mAh g^-1 at 0.1 C and a discharge specific energy of 141.7 mWh g^-1 after 200 cycles at 5.0 C (the retention rate is approximate 99%). These results are attributed to the synergy improvement of the conductivity, the lithium ion diffusion coefficient, and the degree of freedom for volume change of LFP/C_ZIF-8 cathode. This work will contribute to the improvement of the cathode materials of commercial LIB.

储能设备的需求需要开发具有高电化学性能的锂离子电池（LIB）。利用沸石咪唑酸酯骨架8（ZIF-8）对商用LiFePO ₄（LFP）进行表面改性，为具有高电化学性能的商用LFP提供了新的可能性。在这项工作中，通过ZIF-8的原位生长和碳化将碳化的ZIF-8（C _ZIF-8）涂覆在LFP颗粒的表面上。透射电子显微镜（TEM）表明，在LFP / C _ZIF-8样品的表面上存在一个约10 nm的涂层，该涂层具有金属锌和类石墨碳。N ₂吸附和解吸等温线表明涂层具有均匀且简单的连接中孔。作为正极材料，LFP / C _ZIF-8正极活性物质在5.0 C下200次循环后，在0.1 C下的放电比容量为159.3 mAh g ^-1，在14 C下的放电比能量为141.7 mWh g ^-1 99％）。这些结果归因于电导率，锂离子扩散系数和LFP / C _ZIF-8阴极的体积变化自由度的协同改进。这项工作将有助于改进商业LIB的阴极材料。