纳米炭复合物导电剂改进LiCoO2阴极的电化学性能

采用超声方法制备了多壁碳纳米管（MWCNTs）／乙炔黑（AB）复合物（NCCs），并用NCC作为锂离子电池LiCoO2阴极的导电剂，考察了NCC对LiCoO2阴极的电化学性能影响。结果表明：NCC作导电剂的LiCoO2阴极的电化学性能（包括首次放电比容量和容量保持率）优于MWCNTs和AB分别单独作导电剂的LiCoO2阴极的电化学性能。原因归结为两个方面：（1）NCC形成了比MWCNTs或者AB更有效的导电网络；（2）NCC和LiCoO2颗粒之间存在稳定有效的接触。

A nanocarbon composite as a conducting agent to improve the electrochemical performance of a LiCoO2 cathode

Nanocarbon composites (NCCs), which were formed by sonication of multi-walled carbon nanotubes (MWCNTs) and acetylene black (AB), were used as a conducting additive in a LiCoO2 cathode for lithium ion batteries. The electrochemical performance of LiCoO2 cathode dispersed with NCC was investigated. The results showed that the electrochemical performance (including the initial discharge capacity and the capacity retention) of a NCC-loaded LiCoO2 cathode were better than that of a cathode loaded with MWCNTs or AB, which can be ascribed to the superior conducting networks formed in NCC, compared to MWCNTs or AB, and the good and stable contact between NCC and LiCoO2 particles.