The high-rate cycling performance of rechargeable Li-ion batteries was limited by the relatively low electronic conductivity of cathode, which was usually provided by the super P-based carbon material. Here we prepared fast electronic-conductive multi-walled carbon nanotubes (MWCNTs) by pyrolysis of propane with low-cost Fe-Al bimetallic catalysts at ambient pressure. The role of the catalysts on the structure, surface area, and defects of the MWCNTs were investigated; MWCNTs prepared with a Fe/Al ratio of 8:2 had a smooth surface, large specific surface area, and fewer defects. The combination of MWCNTs having high crystallinity and high electrical conductivity with Super P improved the discharge capacity of LiNi_0.5Co_0.2Mn_0.3O₂ cathode at a high rate, which was significantly better than those of the batteries with commercial Super P.

可充电锂离子电池的高倍率循环性能受到阴极相对较低的电导率的限制，而阴极的电导率通​​常是由超P基碳材料提供的。在这里，我们通过低成本环境下的低成本Fe-Al双金属催化剂对丙烷进行热解制备了快速导电的多壁碳纳米管（MWCNT）。研究了催化剂对多壁碳纳米管的结构，表面积和缺陷的影响。以Fe / Al比为8：2制备的MWCNT具有光滑的表面，大的比表面积和更少的缺陷。具有高结晶度和高电导率的MWCNT与Super P的组合改善了LiNi _0.5 Co _0.2 Mn _0.3 O ₂的放电容量 阴极的高速率，明显优于具有商用Super P的电池。