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Optimizing oxygen substituents of a carbon cathode for improved capacitive behavior in ethanol-based zinc-ion capacitors

YUAN Ping XIAO Hao-ming LI Jun-yi LUO Jun-hui LUO Xian-you CHEN Da-ming LI De CHEN Yong

袁平, 肖浩鸣, 李均益, 罗俊辉, 罗先游, 陈大明, 李德, 陈永. 优化炭表面氧官能团增强锌离子电容器的电容性能. 新型炭材料(中英文), 2023, 38(3): 522-533. doi: 10.1016/S1872-5805(23)60733-4
引用本文: 袁平, 肖浩鸣, 李均益, 罗俊辉, 罗先游, 陈大明, 李德, 陈永. 优化炭表面氧官能团增强锌离子电容器的电容性能. 新型炭材料(中英文), 2023, 38(3): 522-533. doi: 10.1016/S1872-5805(23)60733-4
YUAN Ping, XIAO Hao-ming, LI Jun-yi, LUO Jun-hui, LUO Xian-you, CHEN Da-ming, LI De, CHEN Yong. Optimizing oxygen substituents of a carbon cathode for improved capacitive behavior in ethanol-based zinc-ion capacitors. New Carbon Mater., 2023, 38(3): 522-533. doi: 10.1016/S1872-5805(23)60733-4
Citation: YUAN Ping, XIAO Hao-ming, LI Jun-yi, LUO Jun-hui, LUO Xian-you, CHEN Da-ming, LI De, CHEN Yong. Optimizing oxygen substituents of a carbon cathode for improved capacitive behavior in ethanol-based zinc-ion capacitors. New Carbon Mater., 2023, 38(3): 522-533. doi: 10.1016/S1872-5805(23)60733-4

优化炭表面氧官能团增强锌离子电容器的电容性能

doi: 10.1016/S1872-5805(23)60733-4
基金项目: 国家自然科学基金(52062012);广东省重点学科建设项目(2021ZDJS102);广东省高校创新团队(2022KCXTD030、2020KCXTD011);广东大学生科技创新培育专项资金(pdjh2023b0549);佛山科学技术学院学术基金(xsjj202206kjb02)
详细信息
    通讯作者:

    陈大明. E-mail:chendaming@hainanu.edu.cn

    李 德. E-mail:lidenju@sina.com

    陈 永,教授. E-mail:ychen2002@163.com

  • 中图分类号: TQ127.1+1

Optimizing oxygen substituents of a carbon cathode for improved capacitive behavior in ethanol-based zinc-ion capacitors

More Information
  • 摘要: 锌离子电容器(ZICs)具有能量密度高、倍率性能好、循环寿命长、成本低等优点,近年来得到了广泛的研究。在碳基阴极表面引入氧官能团是提高水系ZICs电容性能的有效策略。然而,氧官能团的存在是否有利于提高乙醇(EtOH)基ZICs的电容性能,目前还没有被深入研究。本文采用硝酸氧化和进一步热处理的方法对阴极活性炭表面的氧官能团进行了优化。在ZnCl2/EtOH电解液中,优化后的样品在电流密度为1 A g−1时比电容达到195 F g−1,比未改性的样品 (125 F g−1)提高了56%。同时,ZICs也表现出良好的循环稳定性,在3 A g−1下的稳定循环次数超过16000次,并且保持100%的库仑效率。这是因为氧官能团,特别是羧基和酯基(―COO)的存在,为Zn2+氧化还原反应提供了丰富的电化学活性位点。因此,本研究通过优化氧官能团增强了炭阴极的电容性能,并为EtOH基ZICs的商业应用提供了研究基础。
  • FIG. 2364.  FIG. 2364.

    FIG. 2364..  FIG. 2364.

    Figure  1.  SEM images of (a) AC and (b) AC-O-500. (c, d) Elemental mapping images of AC-O-500

    Figure  2.  (a) Ar adsorption/desorption isotherms, (b) Pore size distributions, (c) Raman spectra, (d) XRD patterns and (e) Contact angles of AC, AC-O, AC-O-400, AC-O-500 and AC-O-600

    Figure  3.  (a) CV curves at different scan rates for (b) AC and (c) AC-O-500, (d) CV comparison of AC and AC-O-500 at 1 mV s−1, (e, f) contribution ratio of the capacitive capacities, (g) contribution ratios, (h) b values in both the charge and discharge processes of AC and AC-O-500, (i) nyquist plots of AC and AC-O-500

    Figure  4.  GCD curves of (a) AC and (b) AC-O-500, (c) rate ability curves, (d) Ragone plot and (e) cycling stability of ZIC with AC- O-500 cathode tested at 3 A g−1

    Figure  5.  (a) FTIR spectra, (b) XPS spectra, (c) O 1s spectra of AC, (d) AC-O, (e) AC-O-500 and (f) OFGs contents

    Figure  6.  (a) Schematic illustrations of the evolution of the OFGs under oxidation and thermal treatment and (b) ZIC energy storage mechanism

    Table  1.   Structural parameters of AC, AC-O, AC-O-400, AC-O-500 and AC-O-600

    Samples SBETa/(m2 g−1)SMicrob/(m2 g−1)VTotalc/(cm3 g−1)VMicrod/(cm3 g−1)
    AC 1751.16 1500.97 0.904 0.734
    AC-O 1240.78 1093.44 0.734 0.521
    AC-O-400 1221.51 1001.25 0.684 0.498
    AC-O-500 1286.62 1020.91 0.699 0.519
    AC-O-600 1386.31 1086.03 0.741 0.558
    Note: a-BET (Brunauer-Emmett-Teller) surface area. b-Micropore specific surface area obtained from the QSDFT method. c-Single-point total pore volume at p/p0 = 0.995. d-Micropore volume obtained from the QSDFT method.
    下载: 导出CSV

    Table  2.   Analysis of the fitted O 1s peaks of the OFGs on the AC samples from XPS spectra

    SamplesC=O (531.3 eV)/%OH (532.3 eV)/%C―O―C (533.3 eV)/%COO (534.3 eV)/%
    AC 1.33 2.69 1.34 0.74
    AC-O 2.23 6.10 3.33 1.50
    AC-O-400 1.93 2.73 5.52 1.77
    AC-O-500 1.53 2.23 4.72 1.93
    AC-O-600 1.28 1.86 3.65 1.25
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-02-21
  • 录用日期:  2023-03-24
  • 修回日期:  2023-03-23
  • 网络出版日期:  2023-03-31
  • 刊出日期:  2023-06-01

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