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  • ISSN 1006-3080
  • CN 31-1691/TQ

新型聚丙烯腈包覆硒化钴/碳复合材料的制备及其在锂离子电池中的应用

陈筱 于海宁 郑楠 许传鹏 姜广宇 李永生

陈筱, 于海宁, 郑楠, 许传鹏, 姜广宇, 李永生. 新型聚丙烯腈包覆硒化钴/碳复合材料的制备及其在锂离子电池中的应用[J]. 华东理工大学学报(自然科学版), 2020, 46(3): 341-348. doi: 10.14135/j.cnki.1006-3080.20190307001
引用本文: 陈筱, 于海宁, 郑楠, 许传鹏, 姜广宇, 李永生. 新型聚丙烯腈包覆硒化钴/碳复合材料的制备及其在锂离子电池中的应用[J]. 华东理工大学学报(自然科学版), 2020, 46(3): 341-348. doi: 10.14135/j.cnki.1006-3080.20190307001
CHEN Xiao, YU Haining, ZHENG Nan, XU Chuanpeng, JIANG Guangyu, LI Yongsheng. Synthesis of a Novel Cobalt Selenide/Carbon Composites with Polyacrylonitrile Coating and Application in Li-Ion Battery[J]. Journal of East China University of Science and Technology, 2020, 46(3): 341-348. doi: 10.14135/j.cnki.1006-3080.20190307001
Citation: CHEN Xiao, YU Haining, ZHENG Nan, XU Chuanpeng, JIANG Guangyu, LI Yongsheng. Synthesis of a Novel Cobalt Selenide/Carbon Composites with Polyacrylonitrile Coating and Application in Li-Ion Battery[J]. Journal of East China University of Science and Technology, 2020, 46(3): 341-348. doi: 10.14135/j.cnki.1006-3080.20190307001

新型聚丙烯腈包覆硒化钴/碳复合材料的制备及其在锂离子电池中的应用

doi: 10.14135/j.cnki.1006-3080.20190307001
基金项目: 国家自然科学基金(51672083)
详细信息
    作者简介:

    陈筱:陈 筱(1994—),男,甘肃张掖人,硕士生,主要研究方向为电化学储能。E-mail:605007883@qq.com

    通讯作者:

    李永生,E-mail:ysli@ecust.edu.cn

  • 中图分类号: TB333

Synthesis of a Novel Cobalt Selenide/Carbon Composites with Polyacrylonitrile Coating and Application in Li-Ion Battery

  • 摘要: 硒化钴因具有良好的脱嵌锂能力而被认为是理想的锂离子电池负极材料,但由于充放电过程中体积膨胀严重和导电性较差,限制了其电池性能。以钴基沸石咪唑骨架(ZIF)材料ZIF-67为前驱体,经过碳化和硒化处理得到硒化钴-碳复合物(CoSe2-C),再经过聚丙烯腈(PAN)包覆和热处理得到环化聚丙烯腈(c-PAN)包覆的硒化钴/碳复合材料(CoSe2-C/c-PAN)。该复合材料作为锂离子电池负极材料表现出了优异的比容量和循环稳定性,0.2 A/g条件下首次放电比容量达到1 440 mA·h/g,1.0 A/g条件下经过200次循环依然表现出高可逆比容量(653 mA·h/g)。这主要归因于环化聚丙烯腈链中的π键对材料中电子电导率和离子传输速率的提升效果,以及柔性高分子链的包覆有效缓解了材料充放电过程中的体积膨胀。

     

  • 图  1  CoSe2-C/c-PAN的合成示意图

    Figure  1.  Schematic illustration for the synthesis of CoSe2-C/c-PAN

    图  2  ZIF-67的SEM图(a);ZIF-67和Co-C的XRD图(b);Co-C的SEM图(c)和TEM图(d)

    Figure  2.  SEM image of ZIF-67 (a); XRD patterns of ZIF-67 and Co-C (b); SEM image (c) and TEM image (d) of Co-C

    图  3  CoSe2-C复合物的SEM图(a),TEM图(b)和HRTEM图(c~d);CoSe2-C/c-PAN复合物的SEM图(e)和TEM图(f)

    Figure  3.  SEM image (a), TEM image (b) and HRTEM images (c~d) of the CoSe2-C composites; SEM image (e) and TEM image (f) of CoSe2-C/c-PAN composites

    图  4  CoSe2-C和CoSe2-C/c-PAN的XRD(a),拉曼光谱(b),红外光谱(c),氮气吸附脱附等温线(d),孔径分布(e)和TG曲线(f)

    Figure  4.  XRD patterns (a),Raman spectra (b),FT-IR spectra (c), nitrogen adsorption-desorption isotherms (d),pore-size distrubutions (e) and TG curves (f) of CoSe2-C and CoSe2-C/C-PAN

    图  5  聚丙烯腈的环化机理图(a);CoSe2-C/c-PAN的N 1s(b),C 1s(c),Co 2p(d)和Se 3d(e)的XPS谱图

    Figure  5.  Cyclized mechanism of PAN (a); XPS spectra of N 1s (b), C 1s (c), Co 2p (d) and Se 3d (e) of CoSe2-C/c-PAN

    图  6  扫描速率0.1 mV/s下CoSe2-C(a)和CoSe2-C/c-PAN(b)的循环伏安曲线;CoSe2-C和CoSe2-C/c-PAN在0.2 A/g条件下的首次充放电曲线(c),0.2 A/g条件下的循环性能(d),倍率性能(e)和1.0 A/g条件下的长循环性能(f)及其库仑效率

    Figure  6.  Cyclic voltammetric curves of CoSe2-C (a) and CoSe2-C/c-PAN (b) at a scan rate of 0.1 mV/s; Initial charge/discharge curves at 0.2 A/g (c), cycling performance at 0.2 A/g (d), rate performance (e), long-term cycling performance (f) and their coulombic efficiencies at 1.0 A/g of CoSe2-C and CoSe2-C/c-PAN

    图  7  CoSe2-C和CoSe2-C/c-PAN的EIS图谱

    Figure  7.  EIS spectra of CoSe2-C and CoSe2-C/c-PAN

    表  1  各种过渡金属硒化物负极的循环性能比较

    Table  1.   Cycling performance comparison of various transition metal chalcogenide based anodes

    Electrode
    materials
    Capacity/
    (mA·h·g−1
    Current density/(A·g−1 Cycle numbers Reference
    CoSe2-C/c-PAN 653 1 200 This work
    CoSe2-C 472 1 200 This work
    CoSe@C 660 1 100 [24]
    PbSe/rGO 300 0.2 100 [25]
    ZnSe/C 657 0.1 100 [26]
    α-MnSe nanocubes 150 1 120 [27]
    SnSe nanosheets 73 0.05 20 [28]
    α-FeSe nanoparticles 340 0.04 40 [29]
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出版历程
  • 收稿日期:  2019-03-07
  • 网络出版日期:  2019-06-19
  • 刊出日期:  2020-06-01

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