【摘要】 研究了多壁碳纳米管MWCNTs的含量对高电压下LMRO电极性能的影响，用SEM和EIS分析了MWCNTs含量对电极性能的影响原因。结果表明：随MWCNTs含量的增加，LMRO电极的循环性能先提升后衰减，高MWCNTs含量电极的面电阻更低，倍率性能更优。循环性能最佳的LR-3MWCNTs电极的面电阻为8.54Ω，是LR-1MWCNTs电极的15.5%。MWCNTs可在MWCNTs与LMRO颗粒间形成非断点式、非曲折的电子传输路径，从而在电极中形成更均匀、更完善的三维导电网络结构，因此可减低电极阻抗、抑制电极极化。当MWCNTs含量超过3%时MWCNTs团聚严重，反而降低电极的循环性能。循环40次时，LR-3MWCNTs电极的R_e（13.79Ω）最低，是LR-1MWCNTs电极的22.7%;LR-3MWCNTs电极的R_ct（61.81Ω）最小，为LR-5MWCNTs电极的26.2%。更多还原

【Abstract】 The effect of the content of multi-walled carbon nanotubes（MWCNTs） on the performance of LMRO electrodes under high voltage was studied, and the reasons for the influence of MWCNTs content on electrode performance were analyzed by SEM and EIS. The results show that with the increase of MWCNTs content, the cycle performance of LMRO electrodes increases at the beginning and then decreases. The surface resistance of electrodes with high MWCNTs content is lower and the rate performance is better. The surface resistance of the LR-3MWCNTs electrode with the best cycle performance is 8.54 Ω, which is 15.5% of that of the LR-1MWCNTs electrode. MWCNTs can form a non-breakpoint and non-tortuous electron transmission path between MWCNTs and LMRO particles, thereby forming a more uniform and more complete three-dimensional conductive network structure in the electrode, thereby reducing the electrode impedance and inhibiting electrode polarization. When the MWCNTs content exceeds 3%, the MWCNTs agglomerate seriously, which reduces the cycle performance of the electrode. After 40 cycles, the LR-3MWCNTs electrode exhibits the lowest Re（13.79 Ω）, which is 22.7% of that of the LR-1MWCNTs electrode. Additionally, its charge transfer resistance(R_ct) is the lowest（61.81 Ω）, representing 26.2% of that of the LR-5MWCNTs electrode.更多还原