阴极
锂(药物)
化学工程
电池(电)
储能
碳纤维
材料科学
硫黄
锂硫电池
碳纳米纤维
化学
无机化学
纳米技术
电化学
电极
复合材料
碳纳米管
有机化学
物理化学
功率(物理)
内分泌学
工程类
物理
复合数
医学
量子力学
作者
Yueyao Liang,Nanping Deng,Jingge Ju,Xiaohai Zhou,Jing Yan,Chongli Zhong,Weimin Kang,Bowen Cheng
标识
DOI:10.1016/j.electacta.2018.05.180
摘要
Lithium-sulfur battery is one of the most prospective chemistries in secondary energy storage field due to its high energy density and theoretical capacity, but the rapid decay of capacity is still a huge challenge. Herein, we reported an ingenious design of nitrogen doped carbon nanofibers with honeycomb-like porous structure for the cathode of lithium-sulfur battery which can effectively suppress the “shuttle effect”. The special porous material with three dimensional (3D) interconnected pore structure is beneficial to enhance the adsorption of lithium polysulfides and accommodate the volume expansion of active materials. In addition, the doped nitrogen can not only improve the conductivity of cathode, but also form a strong interfacial interaction to trap lithium polysulfides. Therefore, the battery with the cathode exhibited a high reversible discharge capacity of 1093.9 mAh g−1 and good capacity retention of 76.0% after 300 cycles at 0.5C rate. After acidification, the cycling performance of the cathode could achieve upon 300 cycles with a very low decay rate of 0.027% at 0.5C.
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