碳纳米管在锂离子电池正极中的应用研究

以碳纳米管及Supper-p/KS-6作为正极导电剂分别制作了锂离子电池。利用SEM研究了电池电极的显微结构,并对电池的电化学性能进行了综合评价。结果表明,与Supper-p/KS-6导电剂相比,碳纳米管导电剂有效降低了电池内阻,显著提高了电池在大倍率情况下的性能,并改善了电池的循环性能:内阻从120 m降到了100 m,10.0C(C为放电倍率)及15.0C时的放电容量分别为0.5C时的90.4%和80.7%,500次循环后的容量保持率达89.0%。

Application of carbon nanotube in lithium-ion battery cathodes

Lithium-ion batteries were prepared with carbon nanotube (CNT) and Supper-p/KS-6 composite as the conductive additive in battery cathodes. The microstructure of the battery cathodes was observed using SEM, and the electrochemical performance of the batteries was comprehensively studied. The results indicate that, compared with Supper-p/KS-6 composite, using CNT as conductive additive effectively reduces the internal resistance, remarkably improves the performance at high discharge rates, and enhances the cycle performance of the battery. With the application of CNT conductive additive, the internal resistance of the battery decreases from 120 mΩ to 100 mΩ, the discharge capacities at 10.0C and 15.0C rates are respectively 90.4% and 80.7% of the discharge capacity at 0.5C rate, and the discharge capacity only reduces by 11% after 500 cycles.