Nanostructured carbon–coated composite cathode materials LiFe_0.5Mn_0.5PO₄/C (LFMP/C) are prepared by the mechanochemically assisted solid-state synthesis using different reagent mixtures and carbon as reducing and covering agent. The effect of the precursors, gas release during the solid-state reaction, and of the intensity of high-energy ball milling on the porous structure and electrochemistry of LFMP/C is studied using DSC/TG/MS, XRD, SEM, TEM, standard contact porosimetry (MSCP), EIS, CV, and GVC. It is shown that the particle size and porosity of LFMP/C strongly depend on the chosen precursors and intensity of mechanical impact. The higher the intensity, the more effective incorporation of carbon black in the pores formed in LFMP, which leads to improved electronic conductivity and better access of the electrolyte to the surface of the electrode, while smaller particles provide improved Li diffusion in the bulk of LFMP. As a result, the cyclability and high-rate performance of the LFMP/C composites are improved.

纳米碳涂层复合正极材料LiFe _0.5 Mn _0.5 PO ₄/ C（LFMP / C）是通过使用不同试剂混合物和碳作为还原剂和覆盖剂的机械化学辅助固态合成制备的。使用DSC / TG / MS，XRD，SEM，TEM等研究了前体，固态反应过程中的气体释放以及高能球磨强度对LFMP / C多孔结构和电化学的影响标准接触孔隙率法（MSCP），EIS，CV和GVC。结果表明，LFMP / C的粒径和孔隙率很大程度上取决于所选的前体和机械冲击强度。强度越高，炭黑在LFMP中形成的孔中的掺入越有效，从而导致电子电导率提高，电解质更好地进入电极表面，而较小的颗粒在LFMP的整体中改善了Li的扩散。结果，改善了LFMP / C复合材料的循环性和高速率性能。