Novel iron oxide nanotube arrays as high-performance anodes for lithium ion batteries
Novel iron oxide nanotube arrays as high-performance anodes for lithium ion batteries
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DOI：
10.1016/j.jpowsour.2015.07.051
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发表时间：
2015-11
影响因子：
9.2
通讯作者：
Yuan Zhong;H. Fan;Ling Chang;H. Shao;Jianming Wang;Jian-qing Zhang;C. Cao
中科院分区：
文献类型：
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作者：
Yuan Zhong;H. Fan;Ling Chang;H. Shao;Jianming Wang;Jian-qing Zhang;C. Cao
纳米铁氧化物是一种很有前途的锂离子电池负极材料。然而，铁氧化物阳极材料的倍率性能和/或电化学循环稳定性的改善仍然是一个关键的挑战，因为它们在循环期间的差的电导率和大的体积膨胀。在此，垂直排列的一维（1D）的氧化铁纳米管阵列与5.8wt%的碳已被制造的一种新的表面无自腐蚀过程和随后的热处理。所制造的纳米管阵列电极在0.6 A g-1的电流下经过50次充放电循环后提供932 mAh g-1的可逆容量。即使在非常高的倍率（8.0 A g−1）下，该电极仍显示出610 mAh g− 1的可逆容量，证明了其出色的倍率性能。此外，该纳米管阵列电极还表现出优异的电化学循环稳定性，在4A g-1的电流下500次循环后可逆容量为880 mAh g-1。该纳米管阵列电极具有上级储锂性能，显示了其作为高性能锂离子电池负极的潜力。
Nanostructured iron oxides can be promising anode materials for lithium ion batteries (LIBs). However, improvement on the rate capability and/or electrochemical cycling stability of iron oxide anode materials remains a key challenge because of their poor electrical conductivities and large volume expansion during cycling. Herein, the vertically aligned arrays of one-dimensional (1D) iron oxide nanotubes with 5.8 wt% carbon have been fabricated by a novel surfactant-free self-corrosion process and subsequent thermal treatment. The as-fabricated nanotube array electrode delivers a reversible capacity of 932 mAh g−1after 50 charge−discharge cycles at a current of 0.6 A g−1. The electrode still shows a reversible capacity of 610 mAh g−1even at a very high rate (8.0 A g−1), demonstrating its prominent rate capability. Furthermore, the nanotube array electrode also exhibits the excellent electrochemical cycling stability with a reversible capacity of 880 mAh g−1after 500 cycles at a current of 4 A g−1. The nanotube array electrode with superior lithium storage performance reveals the promising potential as a high-performance anode for LIBs.