Functionalized N-doped interconnected carbon nanofibers as an anode material for sodium-ion storage with excellent performance
Functionalized N-doped interconnected carbon nanofibers as an anode material for sodium-ion storage with excellent performance
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DOI：
10.1016/j.carbon.2012.12.072
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发表时间：
2013-04
期刊：
影响因子：
10.9
通讯作者：
Zhaohui Wang;Long Qie;Lixia Yuan;Wuxing Zhang;Xianluo Hu;Yunhui Huang
中科院分区：
文献类型：
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作者：
Zhaohui Wang;Long Qie;Lixia Yuan;Wuxing Zhang;Xianluo Hu;Yunhui Huang
采用功能化互连掺氮碳纳米纤维（FN-CNFs）作为负极，提高了钠离子电池的电化学性能。以聚吡咯为前驱体，采用简单的方法合成了该材料。FN-CNF电极具有优异的倍率性能和循环稳定性，在200 mAg − 1的高电流密度下，200次循环后的容量为134.2mAhg− 1，即使在20 Ag −1的极高电流密度下，容量仍保持在73 mAhg − 1。这种上级性能的产生是由于N掺杂位点和功能化基团能够通过表面吸附和表面氧化还原反应快速可逆地捕获钠离子。
The electrochemical performance of sodium-ion battery was improved by using functionalized interconnected N-doped carbon nanofibers (FN-CNFs) as the anode. The material was synthesized with polypyrrole as precursor by a simple method. The FN-CNF electrode exhibits excellent rate capability and cycling stability, delivering a capacity of 134.2mAhg−1at a high current density of 200mAg−1after 200 cycles and retains a capacity of 73mAhg−1even at an extremely high current density of 20Ag−1. The superior performance can be attributed to N-doped sites and functionalized groups, which are capable of capturing sodium ions rapidly and reversibly through surface adsorption and surface redox reactions.