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Micro/mesopore carbon spheres derived from sucrose for high performance supercapacitors

SHI Jing TIAN Xiao-dong LI Xiao LIU Ye-qun SUN Hai-zhen

师晶, 田晓冬, 李肖, 刘叶群, 孙海珍. 蔗糖溶液制备微/介孔炭球及其电容性能[J]. 新型炭材料. doi: 10.1016/S1872-5805(21)60044-6
引用本文: 师晶, 田晓冬, 李肖, 刘叶群, 孙海珍. 蔗糖溶液制备微/介孔炭球及其电容性能[J]. 新型炭材料. doi: 10.1016/S1872-5805(21)60044-6
SHI Jing, TIAN Xiao-dong, LI Xiao, LIU Ye-qun, SUN Hai-zhen. Micro/mesopore carbon spheres derived from sucrose for high performance supercapacitors[J]. NEW CARBON MATERIALS. doi: 10.1016/S1872-5805(21)60044-6
Citation: SHI Jing, TIAN Xiao-dong, LI Xiao, LIU Ye-qun, SUN Hai-zhen. Micro/mesopore carbon spheres derived from sucrose for high performance supercapacitors[J]. NEW CARBON MATERIALS. doi: 10.1016/S1872-5805(21)60044-6

蔗糖溶液制备微/介孔炭球及其电容性能

doi: 10.1016/S1872-5805(21)60044-6
详细信息
  • 中图分类号: TQ127.1+1

Micro/mesopore carbon spheres derived from sucrose for high performance supercapacitors

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  • 摘要: 以蔗糖溶液为碳前驱体,通过简单的水热炭化和KOH/NaOH碱活化方法制备微/介孔碳球。研究了KOH和NaOH活化参数对炭球比表面积和相应孔径分布的影响。炭球作为超级电容器的电极,在6 mol L−1 KOH电解液中具有高的比电容和良好的倍率性能。此外,基于1 mol L−1 MeEt3NBF4/PC有机电解液,微/介孔炭球电极组成的对称电容器表现出高达30.4 Wh kg−1的能量密度和18.5 kW kg−1的功率密度。在5 A g−1的电流密度下,充放电循环15 000次后比容量保持率为73.0%。
  • Figure  1.  SEM images of the samples using HTC∶KOH∶NaOH in mass ratios of (a) 1∶0∶0 (HTC), (b) 1∶3∶0 (ATCK), (c) 1∶0∶3 (ATCNa), (d) 1∶1∶2 (ATCK/Na).

    Figure  2.  (a) XRD patterns and (b) Raman spectra of ATCK, ATCNa and ATCK/Na.

    Figure  3.  (a) The N2 adsorption isotherms and (b) PSDs of ATCK, ATCNa and ATCK/Na.

    Figure  4.  X-ray photoelectron survey scanning spectra of (a) all samples, the deconvoluted O 1s peaks for (b) ATCK, (c) ATCNa and (d) ATCK/Na, respectively.

    Figure  5.  The electrochemical performances of ATCK, ATCNa and ATCK/Na. (a) CV curves at 5 mV s−1, GCD plots at (b) 0.1 A g−1 and (c) 20 A g−1, (d) the IR drop, (e) specific capacitance as a function of current density and (f) Nyquist plots.

    Figure  6.  The electrochemical performance of ATCK/Na electrode in organic electrolyte. (a) CV curves at various scan rates, (b) GCD plots and (c) Cs, Ccell at different current densities, (d) Ragone plot and (e) cycling performance at 5 A g-1.

    Table  1.   Results of sorption tests and elemental compositions of activated carbons.

    Sample SBET (m2 g−1) Smicro (m2 g−1) V(2.0−3.7 nm) (cm3 g−1) Pav (nm) Elemental composition by XPS
    C (at%) O (at%)
    ATCK 1643 1427 0 1.79 90.01 9.99
    ATCNa 834 518 0.06 1.95 94.32 5.68
    ATCK/Na 1160 957 0.03 1.82 92.74 7.26
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出版历程
  • 收稿日期:  2020-03-10
  • 修回日期:  2020-05-20
  • 网络出版日期:  2021-02-05

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