Free-standing porous carbon nanofibers-sulfur composite for flexible Li-S battery cathode.
Free-standing porous carbon nanofibers-sulfur composite for flexible Li-S battery cathode.
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DOI：
10.1039/c4nr02498b
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发表时间：
2014-07
期刊：
影响因子：
6.7
通讯作者：
L. Zeng;F. Pan;Weihan Li;Yu Jiang;Xiongwu Zhong;Yan Yu
中科院分区：
文献类型：
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作者：
L. Zeng;F. Pan;Weihan Li;Yu Jiang;Xiongwu Zhong;Yan Yu
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、自支撑的硫/(PCNFS-CNT)复合电极(S@PCNFS-CNT)。将S@PCNFS-CNT用作锂S电池正极材料时，与不含CNT的S@PCNFS相比，具有更好的循环性能和倍率性能。它在50 mA g(-1)下循环100次后的可逆容量为637 mA h g(-1)，在1A g(-1)下的倍率容量为437 mA h g(-1)。电化学性能的提高归功于三维互连结构、碳纳米管添加剂以及微孔(~lt；2 nm)在PCNFS-CNT基质中均匀分布的协同作用。我们的结果表明，PCNFS-CNT在高效、独立和高性能电池中具有潜在的适用性。
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.