Facile preparation of a V2O3/carbon fiber composite and its application for long-term performance lithium-ion batteries

Facile preparation of a V2O3/carbon fiber composite and its application for long-term performance lithium-ion batteries
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V2O3/碳纤维复合材料的简便制备及其在长期性能锂离子电池中的应用

DOI:
10.1039/c7nj00320j
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发表时间:
2017-06
影响因子:
3.3
通讯作者:
Chen Qinghua
Chen Qinghua
中科院分区:
化学3区
文献类型:
--
作者:
Liu Xinping;Liu Renpin;Zeng Lingxing;Huang Xiaoxia;Chen Xi;Zheng Cheng;Xu Yuxian;Qian Qingrong;Wei Mingdeng;Chen Qinghua

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在本工作中,V2 O3/碳纳米纤维复合材料(V2 O3/CNF),集成了不同量的V2 O3,通过一种简单的方法合成。通过简单的静电纺丝和碳化工艺,成功地将V2 O3纳米颗粒分散在碳纤维中。由于V2 O3和碳之间的协同效应,V2 O3/CNF作为锂离子电池(LIB)的阳极具有高的可逆容量和优异的长期循环稳定性。V2 O3的含量对电化学性能有重要影响。具有优化的V2 O3含量(57重量%)的V2 O3/CNF在500次循环后在0.5 A g-1的电流密度下显示出544 mA h g-1的容量。更重要的是,在4 A g−1的高电流密度下,1000次循环后仍能保持204 mA h g− 1的容量。
In the present work, a vanadium-trioxide/carbon-nanofiber composite (V2O3/CNF), integrated with different amounts of V2O3, was synthesized by a simple approach. After a simple combined electrospinning and carbonization process, V2O3 nanoparticles were successfully distributed through carbon fibers. Due to the synergistic effect between V2O3 and carbon, V2O3/CNF as an anode of lithium-ion batteries (LIBs) exhibits high reversible capacity and excellent long-term cycling stability. The content of V2O3 is of great importance to the electrochemical performance. The V2O3/CNF with the optimized content of V2O3 (57 wt%) shows a capacity of 544 mA h g−1 at a current density of 0.5 A g−1 after 500 cycles. More importantly, a capacity of 204 mA h g−1 at a high current density of 4 A g−1 can be retained after 1000 cycles.
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