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N/S co-doped interconnected porous carbon nanosheets as high-performance supercapacitor electrode materials

WEI Yu-chen ZHOU Jian YANG Lei GU Jing CHEN Zhi-peng HE Xiao-jun

魏雨晨, 周健, 杨磊, 顾敬, 陈志鹏, 何孝军. 高性能超级电容器用N/S共掺杂多孔炭纳米片电极材料. 新型炭材料, 2022, 37(4): 707-715. doi: 10.1016/S1872-5805(22)60595-X
引用本文: 魏雨晨, 周健, 杨磊, 顾敬, 陈志鹏, 何孝军. 高性能超级电容器用N/S共掺杂多孔炭纳米片电极材料. 新型炭材料, 2022, 37(4): 707-715. doi: 10.1016/S1872-5805(22)60595-X
WEI Yu-chen, ZHOU Jian, YANG Lei, GU Jing, CHEN Zhi-peng, HE Xiao-jun. N/S co-doped interconnected porous carbon nanosheets as high-performance supercapacitor electrode materials. New Carbon Mater., 2022, 37(4): 707-715. doi: 10.1016/S1872-5805(22)60595-X
Citation: WEI Yu-chen, ZHOU Jian, YANG Lei, GU Jing, CHEN Zhi-peng, HE Xiao-jun. N/S co-doped interconnected porous carbon nanosheets as high-performance supercapacitor electrode materials. New Carbon Mater., 2022, 37(4): 707-715. doi: 10.1016/S1872-5805(22)60595-X

高性能超级电容器用N/S共掺杂多孔炭纳米片电极材料

doi: 10.1016/S1872-5805(22)60595-X
基金项目: 国家自然科学基金(52072002, 51872005, U1710116和U1508201)和皖江学者项目资助
详细信息
    通讯作者:

    何孝军, 教授. E-mail: xjhe@ahut.edu.cn

  • 中图分类号: TQ536.9

N/S co-doped interconnected porous carbon nanosheets as high-performance supercapacitor electrode materials

More Information
  • 摘要: 如何采用无酸工艺合成高性能超级电容器(SCs)用多孔炭纳米片电极材料是一个大的挑战。本文报道了一种简便且无酸的由煤焦油沥青(CTP)构建N/S共掺杂相互连接的多孔炭纳米片(NS-IPCNs)的新方法。制备的NS-IPCN800具有相互连接的三维结构,这些三维结构由含有大量分级孔的二维炭纳米片组成。其中,丰富的微孔增加了离子吸附所需的活性位点,而短的中孔为离子传输提供了通道。此外,相互连接的三维结构为电子的快速传递提供了通道;掺杂的杂原子为NS-IPCNs电极提供了额外的赝电容。受益于这些优点, NS-IPCN800电极在6 mol L−1 KOH电解液中,在0.05 A g−1电流密度下的比电容达302 F g−1。另外,NS-IPCN800电容器在功率密度为25.98 W kg−1下其能量密度达9.71 Wh kg−1。更重要的是,NS-IPCN800电容器在10 000次循环充放电后电容保持率为94.2%,表现出优异的循环稳定性。这项工作为由CTP构建高性能储能装置用NS-IPCNs开辟了一种危害较小的策略。
  • FIG. 1654.  FIG. 1654.

    FIG. 1654..  FIG. 1654.

    Figure  1.  Schematic diagram for the preparation of sheet-like NS-IPCNs from CTP.

    Figure  2.  FESEM images of (a) NS-IPCN750, (b) NS-IPCN800, (c) NS-IPCN850, (d) N-IPCN800 and (e) S-IPCN800. TEM images of (f) NS-IPCN750, (g) NS-IPCN800 and (h) NS-IPCN850.

    Figure  3.  (a) Nitrogen adsorption/desorption isotherms of IPCNs, (b) Micropores and part mesopores size distribution curves of IPCNs.

    Figure  4.  (a) Raman spectra of IPCNs, (b) Full XPS spectra of IPCNs.

    Figure  5.  (a) CV curves of IPCN electrodes at scan rate of 10 mV s−1 and (b) NS-IPCN800 electrode at scan rates of 2-500 mV s−1.

    Figure  6.  (a) GCD curves of IPCN electrodes at 1 A g−1 in 6 mol L−1 of KOH electrolyte, (b) GCD curves of NS-IPCN800 electrode at different current densities in 6 mol L−1 of KOH electrolyte, (c) Specific capacitance of IPCN capacitors at different current densities, (d) Ragone plots of IPCN capacitors, (e) Nyquist plots of IPCN capacitors, and (f) Cycle stability of NS-IPCN800 capacitor measured at 5 A g−1.

    Table  1.   Pore structure parameters of IPCNs.

    SamplesDap (nm)SBET (m2 g−1)Vt (cm3 g−1)Vmic (cm3 g−1)
    NS-IPCN7502.5210190.850.38
    NS-IPCN8002.6320001.310.60
    NS-IPCN8502.8419771.450.45
    N-IPCN8002.2116220.880.21
    S-IPCN8002.3516820.980.28
    Dap: average pore diameter; SBET: Brunauer–Emmett–Teller (BET) surface area; Vt: total pore volume; Vmic: micropores volume.
    下载: 导出CSV

    Table  2.   Contents of C, O, N and S elements in IPCNs.

    SamplesC 1s (%)O 1s (%)N 1s (%)S 2p (%)O 1s
    C=O (%)C―O (%)―OH (%)
    NS-IPCN75089.637.531.990.844.443.080.01
    NS-IPCN80093.954.630.990.432.412.210.01
    NS-IPCN85094.923.880.870.332.011.860.01
    N-IPCN80091.714.883.41-2.512.360.01
    S-IPCN80090.646.45-3.043.433.010.01
    下载: 导出CSV

    Table  3.   Comparison of the specific capacitance of NS-IPCN800 electrode.

    SampleElectrolyte (mol L−1)Current density (A g−1)Cg (F g−1)Energy density (Wh kg−1)Ref.
    PB/rGO 1.0 Na2SO4 0.3 286 45.4 [34]
    GGI 6.0 KOH 0.5 301 9.1 [35]
    Carbon nanobowls 6.0 KOH 0.1 279 9.6 [36]
    ACS 6.0 KOH 1.0 208 9.2 [37]
    HPCNT 6.0 KOH 0.1 286 8.45 [38]
    SNPCNs 6.0 KOH 0.5 286 5.9 [39]
    RGO 1.0 Na2SO4 0.5 147.5 3.3 [40]
    HGNs 6.0 KOH 1.0 295 9.4 [41]
    NPS-HCS 6.0 KOH 0.5 274 8.4 [42]
    NS-IPCN800 6.0 KOH 0.05 302 9.71 This work
    下载: 导出CSV
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  • 收稿日期:  2021-10-06
  • 修回日期:  2021-12-09
  • 网络出版日期:  2022-01-05
  • 刊出日期:  2022-08-01

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