高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (2): 662.doi: 10.7503/cjcu20200609

• 研究论文 • 上一篇    

层状钒青铜纳米片的制备及其锂离子电池阳极材料性能

周战1,马录芳1,谭超良2   

  1. 1.洛阳师范学院化学化工学院, 河南省功能多孔材料重点实验室, 洛阳 471934
    2.香港城市大学电机工程系, 香港九龙
  • 收稿日期:2020-08-27 出版日期:2021-02-10 发布日期:2021-02-05
  • 作者简介:谭超良, 男, 博士, 助理教授, 主要从事新型二维层状纳米材料的设计、 制备及应用研究. E⁃mail: chaoltan@cityu.edu.hk
  • 基金资助:
    中原科技创新领军人才支持计划(204200510001);香港城市大学启动基金项目(9610495)

Preparation of Layered (NH42V6O16·H2O Nanosheets as an Anode for Li-ion Batteries

ZHOU Zhan1, MA Lufang1(), TAN Chaoliang2()   

  1. 1.College of Chemistry and Chemical Engineering,Henan Key Laboratory of Function?Oriented Porous Materials,Luoyang Normal University,Luoyang 471934,China
    2.Department of Electrical Engineering,City University of Hong Kong,Kowloon,Hong Kong,China
  • Received:2020-08-27 Online:2021-02-10 Published:2021-02-05
  • Contact: MA Lufang E-mail:mazhuxp@126.com;chaoltan@cityu.edu.hk
  • Supported by:
    the Project of Central Plains Science and Technology Innovation Leading Talents of Henan Province, China(204200510001);the Funding Support from the Start-Up Grant from City University of Hong Kong, China(9610495)

摘要:

室温下, 在水溶液中将铵根离子和水分子插入到商用V2O5纳米颗粒的层间, 制得了层状的钒青 铜[(NH4)2V6O16·H2O]纳米片. 该纳米片的尺寸为2~10 μm, 厚度为50~250 nm. 与商用V2O5纳米颗粒相比, (NH4)2V6O16·H2O纳米片用作锂离子电池(LIBs)的阳极材料时, 其性能得到较大提升, 包括大的可逆放电容量 (0.1 A/g时为1148 mA·h/g)、 出色的循环性能(循环70圈后在0.1 A/g时具有1002 mA·h/g的高容量)和高倍率性能(在0.1 A/g时具有1070 mA·h/g的可逆性能). 研究结果表明, (NH4)2V6O16·H2O纳米片可以作为锂离子电池优良的阳极材料, 也有望应用于其它(如钠离子电池和锌离子电池等)可再充电电池.

关键词: 五氧化二钒, 钒青铜纳米片, 插层, 锂离子电池

Abstract:

Vanadium pentoxide(V2O5) nanomaterials have been extensively investigated as promising electrode materials for rechargeable batteries due to its high theoretical specific capacity. Herein, we report the preparation of layered (NH42V6O16·H2O nanosheets by intercalation of commercial V2O5 nanoparticles with ammonium ions and water molecules in aqueous solution at room temperature. The as-prepared (NH42V6O16·H2O nanosheets have a size of 2—10 μm and thickness of 50—250 nm. Importantly, when used as an anode mate-rial for Li-ion batteries(LIBs), the (NH42V6O16·H2O nanosheets exhibit much enhanced performances in comparison with commercial V2O5 nanoparticles, including large reversible discharge capacity(1148 mA·h/g at 0.1 A/g), excellent cycling performance(a high capacity of 1002 mA·h/g at 0.1 A/g after 70 cycles) and high rate capability(reversible capabilities of 1070 mA·h/g at 0.1 A/g). The results demonstrate that the (NH42V6O16·H2O nanosheets can be used as an excellent anode material for LIBs, which may be also promising for other rechargeable batteries, such as Na-ion batteries and Zn-ion batteries.

Key words: Vanadium pentoxide, (NH42V6O16·H2O Nanosheets, Intercalation, Lithium-ion battery

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