阳极
石墨烯
材料科学
纳米纤维
碳纳米纤维
电流密度
电化学
离子
钠
碳纤维
吸附
静电纺丝
纳米技术
化学工程
复合材料
电极
化学
碳纳米管
工程类
冶金
聚合物
复合数
物理化学
有机化学
量子力学
物理
作者
Taiqiang Chen,Yong Liu,Likun Pan,Ting Lü,Ye-Feng Yao,Zhenrong Sun,Daniel H. C. Chua,Qun Chen
出处
期刊:Journal of materials chemistry. A, Materials for energy and sustainability
[The Royal Society of Chemistry]
日期:2014-01-01
卷期号:2 (12): 4117-4117
被引量:277
摘要
A simple and scalable electrospinning process followed by thermal treatment was used to fabricate carbon nanofibers (CFs). The as-prepared CFs were investigated as anode materials for sodium ion batteries (SIBs). Remarkably, due to their weakly ordered turbostratic structure and a large interlayer spacing between graphene sheets, the CFs exhibit a dominant adsorption/insertion sodium storage mechanism that shows high reversibility. As a result, the CFs show excellent electrochemical performance, especially cycle stability (97.7% capacity retention ratio over 200 cycles). Reversible capacities of 233 and 82 mA h g−1 are obtained for the CFs at a current density of 0.05 A g−1 and even a high current density of 2 A g−1, respectively. The excellent cycle performance, high capacity and good rate capability make the CFs promising candidates for practical SIBs.
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