Zeng Linchao, Pan Fusen, Li Weihan, Jiang Yu, Zhong Xiongwu, Yu Yan
CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Anhui Hefei 230026, China.
Nanoscale. 2014 Aug 21;6(16):9579-87. doi: 10.1039/c4nr02498b. Epub 2014 Jul 10.
Flexible and free-standing sulphur/(PCNFs-CNT) composite (S@PCNFs-CNT) electrode was successfully prepared by infiltrating sulfur into microporous carbon nanofibers-carbon nanotube (PCNFs-CNT) composite. When used as a cathode material for Li-S batteries, the S@PCNFs-CNT exhibits much better cycle performance and rate performance compared to CNT-free S@PCNFs. It delivers a reversible capacity of 637 mA h g(-1) after 100 cycles at 50 mA g(-1) and a rate capability of 437 mA h g(-1) at 1 A g(-1). The improved electrochemical performance is attributed to synergistic effect of the 3D interconnected structure, the additive of CNT, and the uniform distribution of micropores (<2 nm) in the PCNFs-CNT matrix. Our results indicate the potential suitability of PCNFs-CNT for efficient, free-standing, and high-performance batteries.
通过将硫渗透到微孔碳纳米纤维-碳纳米管（PCNFs-CNT）复合材料中，成功制备了柔性自立式硫/（PCNFs-CNT）复合材料（S@PCNFs-CNT）电极。当用作锂硫电池的阴极材料时，与不含CNT的S@PCNFs相比，S@PCNFs-CNT表现出更好的循环性能和倍率性能。在50 mA g(-1)下循环100次后，其可逆容量为637 mA h g(-1)，在1 A g(-1)下的倍率性能为437 mA h g(-1)。电化学性能的改善归因于三维互连结构、CNT添加剂以及PCNFs-CNT基质中均匀分布的微孔（<2 nm）的协同效应。我们的结果表明PCNFs-CNT在高效、自立式和高性能电池方面具有潜在的适用性。
