电化学
碳纳米管
电极
锐钛矿
法拉第效率
电解质
纳米管
循环伏安法
无机化学
锂(药物)
纳米技术
作者
Xijun Xu,Zhengbo Liu,Shaomin Ji,Zhuosen Wang,Zhenyu Ni,Yunqiong Lv,Jiangwen Liu,Jun Liu
标识
DOI:10.1016/j.cej.2018.11.191
摘要
Abstract Na-ion batteries (SIBs) have now attractive extensive attention due to the wide-spread preserve of sodium resources and low cost, which have the potential as the alternative for Li-ion batteries and suitable for large energy station application. Herein, we have rationally synthesized uniform nanotube-structured FeS@TiO2@C anode with metal-organic framework (Fe-MOF) rods as the self-support template. Such uniform ternary FeS@TiO2@C nanotubes were facilely prepared by sulfuration of FeTiO3@C nanotubes, which were obtained by a one-pot annealing of TiO2-coated Fe-MOF nanorods. This carbon-wrapped hollow nanostructure could effectively mitigate the volume expansion, improve the electronic conductivity and provide more channels and active sites for Na+ transporting. In detail, these uniform FeS@TiO2@C nanotubes achieve superior rate capability (with a high reversible capacity of 387, 390, 376, 348, 325, and 286 mA h g−1 at the current density of 0.1, 0.2, 0.5, 1.0, 2.0, and 5.0 A g−1, respectively) and excellent cycling performance (with a reversible capacity of 454 mA h g−1 after 120 cycles at 0.2 A g−1 and 406 mA h g−1 after 150 cycles at 1.0 A g−1).
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