Engineering high-performance polyoxometalate/PANI/MWNTs nanocomposite anode materials for lithium ion batteries

Engineering high-performance polyoxometalate/PANI/MWNTs nanocomposite anode materials for lithium ion batteries
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用于锂离子电池的高性能多金属氧酸盐/PANI/MWNTs纳米复合负极材料的工程设计

DOI:
10.1016/j.cej.2017.05.153
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发表时间:
2017-10
期刊:
Chem. Eng. J.
影响因子:
--
通讯作者:
Song Yu-Fei
Song Yu-Fei
中科院分区:
其他
文献类型:
--
作者:
Hu Jun;Jia Feifei;Song Yu-Fei

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设计高效、稳定、具有良好电化学性能的新型电极材料是储能领域最具挑战性的问题之一。在此,我们利用一种简单的逐步改性方法合成了一种新型层次化PMo12/PANI/MWNTs纳米复合材料(PMo12: [PMo12O40]3−;PANI:聚苯胺;MWNTs:多壁碳纳米管)。通过FT-IR、Raman、SEM、TEM、EDX和XPS等手段对纳米复合材料进行了表征。PMo12/PANI/MWNTs纳米复合材料作为锂离子电池(LIB)负极材料的电化学性能表明,在0.5 mA·cm−2电流密度下,100次循环的总放电容量为1000 mAh·g−1。PMo12、PANI和MWNTs之间的协同效应被认为是提高放电和倍率容量以及整体稳定性的关键因素,而不是单独的成分。PMo12/PANI/MWNTs纳米复合材料在开发高效的锂离子电池替代阳极材料方面具有很大的潜力。
One of the most challenging problems in energy storage is the design of new electrode materials with high efficiency, stability and desirable electrochemical behavior. Herein, we have synthesized a novel hierarchical PMo12/PANI/MWNTs nanocomposite material (PMo12: [PMo12O40]3−; PANI: polyaniline; MWNTs: multi-walled carbon nanotubes) utilizing a facile stepwise modification method. The nanocomposite material has been fully characterized by FT-IR, Raman, SEM, TEM, EDX and XPS. The electrochemical performance of the PMo12/PANI/MWNTs nanocomposite as anode material in a lithium ion batteries (LIB) setup shows an overall discharge capacity of 1000 mAh·g−1for 100 cycles at a current density of 0.5 mA·cm−2. The synergistic effect between the PMo12, PANI and MWNTs has been identified as the key element responsible for the improved discharge and rate capacities as well as the overall improved stability in contrast to the individual components. The PMo12/PANI/MWNTs nanocomposite shows great potential for the development of highly efficient alternative anode materials for LIBs.
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