Electrochemical performance of carbon/Ni composite fibers from electrospinning as anode material for lithium ion batteries
Electrochemical performance of carbon/Ni composite fibers from electrospinning as anode material for lithium ion batteries
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DOI：
10.1039/c2ta00487a
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发表时间：
2013
影响因子：
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通讯作者：
Bin Wang;Jianli Cheng;Yuping Wu;Wang Dan;D. He
中科院分区：
文献类型：
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作者：
Bin Wang;Jianli Cheng;Yuping Wu;Wang Dan;D. He
采用静电纺丝的方法，将聚丙烯腈溶液溶解于二甲基甲酰胺和硝酸镍溶液中，然后进行热处理，制备了原位掺入镍的碳纤维。所制备的一维复合纤维均匀分布在电子导电镍网络中。作为锂离子电池的负极材料，采用循环伏安法、恒流密度测试和电化学阻抗谱对其电化学行为进行了测试。碳/Ni纤维电极在50次循环后保持约457 mA h g−1的高可逆容量。在不同电流密度下测试，显示出优异的速率性能和较高的可逆容量。
Carbon fibers with in situ incorporation of nickel were prepared by electrospinning a solution of a polyacrylonitrile dissolved in a dimethylformamide solution with nickel nitrate, followed by thermal treatment. The prepared one-dimensional composite fibers are uniformly dispersed with an electronic conducting Ni network. As an anode material for lithium-ion batteries, their electrochemical behaviors were measured by cyclic voltammetry, constant current density testing and electrochemical impedance spectroscopy. The carbon/Ni fiber electrode maintains a high reversible capacity of about 457 mA h g−1 after 50 cycles. When tested at different current densities, it shows excellent rate capability with high reversible capacity.