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首页> 外文期刊>Chemistry: A European journal >Dawson-Type Polyoxomolybdate Anions (P2Mo_(18)O_(62) ~(60)) Captured by Ionic Liquid on Graphene Oxide as High-Capacity Anode Material for Lithium-Ion Batteries
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Dawson-Type Polyoxomolybdate Anions (P2Mo_(18)O_(62) ~(60)) Captured by Ionic Liquid on Graphene Oxide as High-Capacity Anode Material for Lithium-Ion Batteries

机译：DAWSON型聚氧钼钼酸盐（P2MO_（18）O_（62）〜（60））由离子液体捕获的石墨烯氧化物作为锂离子电池的高容量阳极材料

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摘要

The development of advanced anode materials is of significance for the next generation of lithium-ion batteries (LIBs). Herein, imidazolium-based ionic liquids (ILs) are grafted covalently on the surface of graphene oxides (GO) through the carboxyl-amino bond, providing a loading hotbed for the Dawson-type polyoxometalate (POM) of (NH_4)6P_2Mo_(18)O_(62) (denoted as P_2Mo_(18)). The as-prepared GO-ILP_2Mo_(18) nanocomposite is characterized by FTIR and Raman spectroscopy, TGA, SEM, TEM, and XPS. The nanocomposite is used as the anode material for LIBs, and shows a high reversible capacity of 903.9 mAhg~(-1) with a long cycle life over 1000 cycles. Galvanostatic cycling tests, CV measurements, and AC impedance spectra reveal that the POMs in the GOIL- P_2Mo_(18) nanocomposite give an enhanced specific capacity during the Lithium insertion/extraction process, and the IL provides a favored contact between the electrolyte and the electrode.
机译：高级阳极材料的开发对于下一代锂离子电池（LIBS）具有重要意义。 在此，基于咪唑鎓的离子液体（ILS）通过羧基 - 氨基键在石墨烯氧化物（去）的表面上共价接枝，为（NH_4）6P_2MO_（18）的DAWSON型聚氧化膦酸盐（POM）提供负荷。 O_（62）（表示为p_2mo_（18））。 由FTIR和拉曼光谱，TGA，SEM，TEM和XPS的特征在于制备的GO-ILP_2MO_（18）纳米复合材料。 纳米复合材料用作LIBS的阳极材料，并且显示出903.9mAhg〜（-1）的高可逆容量，具有超过1000个循环的长循环寿命。 电压循环试验，CV测量和交流阻抗谱显示，Goil-P_2MO_（18）纳米复合材料中的POM在锂插入/提取过程中产生增强的特定能力，并且IL在电解质和电极之间提供有利的接触 。

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  • 来源
    《Chemistry: A European journal》 |2017年第36期|共7页
  • 作者

    Jun Hu; Hongling Diao; Wenjing Luo; Yu-Fei Song;

  • 作者单位

    State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology 100029 Beijing (P. R. China);

    State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology 100029 Beijing (P. R. China);

    State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology 100029 Beijing (P. R. China);

    State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology 100029 Beijing (P. R. China);

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 应用化学;
  • 关键词

    anode materials; electrochemistry; graphene oxide; ionic liquids; polyoxometalates;

    机译：阳极材料;电化学;石墨烯;离子液体;聚毒液液;

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