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Improving electron and ion transport by constructing 3D graphene nanosheets sandwiched between porous carbon nanolayers produced from resorcinol-formaldehyde resin for high-performance supercapacitor electrodes

SUN Bing TANG Wen XIANG Hui XU Wen-li CONG Ye YUAN Guan-ming ZHU Hui ZHANG Qin LI Xuan-ke

孙兵, 唐文, 向辉, 徐文莉, 丛野, 袁观明, 朱辉, 张琴, 李轩科. 三明治状多孔石墨烯基纳米片用于高性能电容器. 新型炭材料(中英文), 2022, 37(3): 564-574. doi: 10.1016/S1872-5805(22)60604-8
引用本文: 孙兵, 唐文, 向辉, 徐文莉, 丛野, 袁观明, 朱辉, 张琴, 李轩科. 三明治状多孔石墨烯基纳米片用于高性能电容器. 新型炭材料(中英文), 2022, 37(3): 564-574. doi: 10.1016/S1872-5805(22)60604-8
SUN Bing, TANG Wen, XIANG Hui, XU Wen-li, CONG Ye, YUAN Guan-ming, ZHU Hui, ZHANG Qin, LI Xuan-ke. Improving electron and ion transport by constructing 3D graphene nanosheets sandwiched between porous carbon nanolayers produced from resorcinol-formaldehyde resin for high-performance supercapacitor electrodes. New Carbon Mater., 2022, 37(3): 564-574. doi: 10.1016/S1872-5805(22)60604-8
Citation: SUN Bing, TANG Wen, XIANG Hui, XU Wen-li, CONG Ye, YUAN Guan-ming, ZHU Hui, ZHANG Qin, LI Xuan-ke. Improving electron and ion transport by constructing 3D graphene nanosheets sandwiched between porous carbon nanolayers produced from resorcinol-formaldehyde resin for high-performance supercapacitor electrodes. New Carbon Mater., 2022, 37(3): 564-574. doi: 10.1016/S1872-5805(22)60604-8

三明治状多孔石墨烯基纳米片用于高性能电容器

doi: 10.1016/S1872-5805(22)60604-8
基金项目: 国家自然科学基金 (51902232,52072275)
详细信息
    通讯作者:

    张 琴,博士,副教授. E-mail:zhangqin627@wust.edu.cn

    李轩科,博士,教授. E-mail:xkli8524@sina.com

  • 中图分类号: TQ152

Improving electron and ion transport by constructing 3D graphene nanosheets sandwiched between porous carbon nanolayers produced from resorcinol-formaldehyde resin for high-performance supercapacitor electrodes

More Information
  • 摘要: 理想的电极结构应由具有较短传输距离的三维互穿电子和离子通道组成。本文通过在石墨烯表面构建厚度可调的间苯二酚-甲醛树脂碳,制备石墨烯纳米片三明治状多孔石墨烯基电极,并通过化学活化进一步提高树脂碳孔隙率。三维交联结构为离子提供丰富的输运通道,同时缩短离子扩散路径。此外,石墨烯网络增强电导率,促进电子传输。基于其结构特点,具有较薄树脂碳层的三明治状多孔石墨烯基纳米片电极在电流密度为0.2 A g−1的情况下,其比电容最高可达324 F g−1。与初始电容相比,在5 A g−1的大电流密度下,经过8000次充放电后,仍具有99%的容量保持率,具有良好的循环稳定性。研究结构揭示了其结构与电化学性能之间的关系,为开发高电子和离子输运效率的电极材料提供了有效策略。
  • FIG. 1539.  FIG. 1539.

    FIG. 1539.. 

    Figure  1.  (a) Schematic illustration of preparation process of sandwich–like and hierarchical porous carbon/graphene nanosheets, (b) macroscopic feature of CGS, (c) SEM image of original CGS, (d) SEM image of KACGS, (e–f) TEM images of KACGS, (g) HRTEM image of KACGS.

    Figure  2.  (a) Raman spectra and (b) XRD patterns of GO, CGS and KACGS, (c) N2 adsorption/desorption isotherms and (d) pore size distribution curves of CGS and KACGS.

    Figure  3.  SEM images of CGSs with different thicknesses of RFC, (a, b) CGS, (c, d) 4d–CGS and (e, f) 8d–CGS.

    Figure  4.  (a) Galvanostatic charge/discharge cycling at constant currents of 1 A g–1, (b) cyclic voltammograms at scan rate of 10 mV s–1, (c, d) Nyquist plots of the experimental impedance data for GO, RFC, CGS and KACGS.

    Figure  5.  Electrochemical performances of KACGS, (a) cyclic voltammograms at different scan rates, (b) galvanostatic charge/discharge cycling at different currents densities, (c) nyquist plots of the experimental impedance data, the inset shows the expanded high–frequency region of the plots (10 mHz to 100 kHz, ac amplitude, 5 mV). (d) cycling stability tests (8000 cycles) at current density of 5 A g–1 within the potential window range from 0 to –1 V.

    Figure  6.  Schematic showing rapid transport of electrons and charged ions effectively adsorbed in the layer of KACGS.

    Table  1.   Comparison of electrochemical performance of KACGS with some representative active carbon-based electrodes for supercapacitors (All were tested in three electrode system).

    ElectrodeElectrolyteSpecific capacitance (F g–1)Ref.
    Sandwich–like hierarchical porous carbon/graphene/carbon 6 mol L−1 KOH 324 (0.2 A g−1)
    224 (1A g−1)
    This work
    N-doped ordered
    mesoporous carbon
    6 mol L−1 KOH 227 (0.2 A g−1) [33]
    KOH-activated carbon 6 mol L−1 KOH 152.6 (0.5 A g−1) [34]
    Hollow porous carbon spheres 6 mol L−1 KOH 303.9 (0.1 A g−1) [35]
    N-containing hierarchical
    porous carbon spheres
    7 mol L−1 KOH 276 (0.1 A g−1) [36]
    N/S-co-doped carbon nanobowls 6 mol L−1 KOH 279 (0.1 A g−1) [37]
    MXene-bonded activated carbon 1 mol L−1 Et4NBF4/AN 126 (0.1 A g−1) [38]
    N-doped mesoporous carbon 6 mol L−1 KOH 218 (0.5 A g−1) [39]
    3D Carbon aerogels 6 mol L−1 KOH 151 (0.5 A g−1) [40]
    Branched carbon nanotube/carbon nanofiber composite 1 mol L−1 H2SO4 207 (1 A g−1) [41]
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-09-10
  • 修回日期:  2020-10-14
  • 网络出版日期:  2022-03-04
  • 刊出日期:  2022-06-01

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