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A high-rate and ultrastable anode enabled by surface oxidation and intercalation modification of hard carbon for lithium ion capacitors

ZHANG Lu-yao WANG He QIN Nan ZHENG Jun-sheng ZHAO Ji-gang

张璐瑶, 王赫, 秦楠, 郑俊生, 赵基钢. 表面氧化和插层改性硬碳负极锂离子电容器的性能研究. 新型炭材料. doi: 10.1016/S1872-5805(22)60632-2
引用本文: 张璐瑶, 王赫, 秦楠, 郑俊生, 赵基钢. 表面氧化和插层改性硬碳负极锂离子电容器的性能研究. 新型炭材料. doi: 10.1016/S1872-5805(22)60632-2
ZHANG Lu-yao, WANG He, QIN Nan, ZHENG Jun-sheng, ZHAO Ji-gang. A high-rate and ultrastable anode enabled by surface oxidation and intercalation modification of hard carbon for lithium ion capacitors. New Carbon Mater.. doi: 10.1016/S1872-5805(22)60632-2
Citation: ZHANG Lu-yao, WANG He, QIN Nan, ZHENG Jun-sheng, ZHAO Ji-gang. A high-rate and ultrastable anode enabled by surface oxidation and intercalation modification of hard carbon for lithium ion capacitors. New Carbon Mater.. doi: 10.1016/S1872-5805(22)60632-2

表面氧化和插层改性硬碳负极锂离子电容器的性能研究

doi: 10.1016/S1872-5805(22)60632-2
基金项目: 国家自然科学基金(51777140),科技部科技支撑计划项目(2015BAG06B00),同济大学中央高校基本科研基金(22120180519)
详细信息
    通讯作者:

    郑俊生,副研究员. E-mail:jszheng@tongji.edu.cn

    赵基钢,副教授. E-mail:zjg@ecust.edu.cn

A high-rate and ultrastable anode enabled by surface oxidation and intercalation modification of hard carbon for lithium ion capacitors

Funds: The authors acknowledge the financial support from the National Natural Science Foundation of China, Grant Nos. 51777140, the Science and Technology Support Project of Ministry of Science and Technology, (2015BAG06B00), and the Fundamental Research Funds for the Central Universities at Tongji University (22120180519)
More Information
  • 摘要: 由于锂离子电容器正负极材料的储能机理不同,正极材料对其功率密度和倍率性能有很大限制。硬碳是一种很有前景的锂离子电容器负极材料,对碳材料进行改性是提高锂离子电容器电化学性能的重要手段之一。本研究采用氧化插层法制备的硬碳插层复合材料(ZnCl2-OHC),0.05 A·g−1电流密度下半电池可逆容量为257.4 mAh·g−1。ZnCl2-OHC作负极、活性炭作正极的全电池容量保持可达43.3%,比未经处理硬碳作负极的全电池提高了两倍以上,1 A·g−1电流密度下充放电5000次后容量保持率约为98.4%。因此,通过硬碳的表面氧化和插层改性可以作为未来提升锂离子电容器负极性能的一种途径。
  • Figure  1.  SEM image of (a)(b) untreated HC, (c)(d) OHC without ultrasound treatment, (e)(f) OHC with ultrasound treatment

    Figure  2.  SEM image of (a) untreated hard carbon, (b) intercalated hard carbon, (c) 400 °C intercalated hard carbon, (d) 500 °C intercalated hard carbon and their (e) XRD pattern

    Figure  3.  SEM images of different hard carbon materials, (a) HC, (b) OHC, (c) ZnCl2-HC, (d) ZnCl2-OHC and (e) XRD pattern of hard carbon treated by different means

    Figure  4.  N2 sorption isotherm of (a) HC, (b) OHC, (c) ZnCl2-HC and (d) ZnCl2-OHC

    Figure  5.  Raman spectra of hard carbon materials by different means

    Figure  6.  (a) XPS survey spectrum of HC and ZnCl2-OHC and XPS (b) C1s (c) Zn2p (d) Cl2p spectra of ZnCl2-OHC

    Figure  7.  Half-cell rate capability of the different electrodes.

    Figure  8.  Half-cell cycling performance (a-b) and charge/discharge curve (c-d) of the different electrodes

    Figure  9.  CV curves of (a)HC、(b)OHC、(c)ZnCl2-HC and (d)ZnCl2-OHC at different sweep speeds

    Figure  10.  (a) Rate capability and (b) cycling performance of the different LICs

    Table  1.   Pore structure parameters of hard carbon materials before and after treatment

    ComponentSpecific surface area /m2·g−1
    SBETSLANGUIR
    HC2.286.29
    OHC11.5830.53
    ZnCl2-HC8.3122.39
    ZnCl2-OHC47.91120.66
    下载: 导出CSV

    Table  2.   Analysis of elements on the surface of ZnCl2-OHC

    NameStart BEPeak BEEnd BEHeight CPSAtomic %
    C1s297.98283.47279.1832914.6283.75
    Cl2p210.03197.4190.131095.692.14
    O1s544.98531.39525.183586.4512.73
    Zn2p1052.031021.111015.134324.721.38
    下载: 导出CSV
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  • 收稿日期:  2022-01-01
  • 网络出版日期:  2022-07-28

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