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首页> 外文期刊>Chemistry: A European journal >Electrochemical Performance and Storage Mechanism of Ag_2Mo_2O_7 Micro-rods as the Anode Material for Lithium-Ion Batteries
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Electrochemical Performance and Storage Mechanism of Ag_2Mo_2O_7 Micro-rods as the Anode Material for Lithium-Ion Batteries

机译：AG_2MO_2O_7微杆作为锂离子电池阳极材料的电化学性能及储存机理

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摘要

Ag_2Mo_2O_7 micro-rods are prepared by one-step hydrothermal method and their lithium electrochemical properties, as the anode for lithium-ion batteries, are comprehensively studied in terms of galvanostatic charge-discharge cycling, cyclic voltammetry, and rate performance measurements. The electrode delivers a high reversible capacity of 825 mAhg~(-1) at a current density of 100 mAg~(-1) and a superior rate capability with a discharge capacity of 263 mAhg~(-1) under the high current density of 2 Ag~(-1). The structural transition and phase evolution of Ag_2Mo_2O_7 were investigated by using ex situ XRD and TEM. The Ag_2Mo_2O_7 electrode is likely to be decomposed into amorphous molybdenum, Li_2O, and metallic silver based on the conversion reaction. Silver nanoparticles are not involved in the subsequent electrochemical cycles to form a homogeneous conducting network. Such in situ decomposition behavior provides an insight into the mechanism of the electrochemical reaction for the anode materials and would contribute to the design of new electrode materials in future.
机译：AG_2MO_2O_7微棒通过一步水热法制备，其锂电化学性能作为锂离子电池的阳极，在Galvanostatic电荷 - 放电循环，循环伏安法和速率性能测量方面被全面地研究。电极以100mAg〜（-1）的电流密度为825mAhg〜（-1）的高可逆容量，并在高电流密度下放电容量为263mAhg〜（-1）的优异速率能力2 Ag〜（-1）。通过使用EX原位XRD和TEM研究了AG_2MO_2O_7的结构转变和相位演化。 AG_2MO_2O_7电极可能将基于转化反应分解成无定形钼，Li_2O和金属银。银纳米颗粒不参与随后的电化学循环以形成均匀的导电网络。这种原位分解行为提供了对阳极材料的电化学反应机制的洞察，并且将来会有助于未来新电极材料的设计。

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  • 来源
    《Chemistry: A European journal》 |2017年第21期|共6页
  • 作者

    Meina Zhang; Yu Gao; Nan Chen; Xin Ge; Hong Chen; Yingjin Wei; Fei Du; Gang Chen; Chunzhong Wang;

  • 作者单位

    Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) College of Physics Jilin University Changchun 130012 (P.R. China);

    Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) College of Physics Jilin University Changchun 130012 (P.R. China);

    Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) College of Physics Jilin University Changchun 130012 (P.R. China);

    State Key Laboratory of Rare Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Science Changchun 130022 (P.R. China);

    Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) College of Physics Jilin University Changchun 130012 (P.R. China);

    Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) College of Physics Jilin University Changchun 130012 (P.R. China);

    Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) College of Physics Jilin University Changchun 130012 (P.R. China);

    Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) College of Physics Jilin University Changchun 130012 (P.R. China);

    Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) College of Physics Jilin University Changchun 130012 (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

    Ag_2Mo_2O_7 micro-rods; anode materials; energy conversion; lithium-ion batteries; storage mechanism;

    机译：AG_2MO_2O_7微杆;阳极材料;能量转换;锂离子电池;储存机制;

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