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二维B、N掺杂炭片的电化学氧化及其赝电容性能

胡友仁 董晓玲 侯璐 庄洪坤 李文翠

胡友仁, 董晓玲, 侯璐, 庄洪坤, 李文翠. 二维B、N掺杂炭片的电化学氧化及其赝电容性能[J]. 新型炭材料. doi: 10.1016/S1872-5805(21)60084-7
引用本文: 胡友仁, 董晓玲, 侯璐, 庄洪坤, 李文翠. 二维B、N掺杂炭片的电化学氧化及其赝电容性能[J]. 新型炭材料. doi: 10.1016/S1872-5805(21)60084-7
HU You-ren, DONG Xiao-ling, HOU Lu, ZHUANG Hong-kun, LI Wen-cui. Electrochemical oxidation of 2D B, N-doped carbon nanosheets for pseudocapacitance property[J]. NEW CARBON MATERIALS. doi: 10.1016/S1872-5805(21)60084-7
Citation: HU You-ren, DONG Xiao-ling, HOU Lu, ZHUANG Hong-kun, LI Wen-cui. Electrochemical oxidation of 2D B, N-doped carbon nanosheets for pseudocapacitance property[J]. NEW CARBON MATERIALS. doi: 10.1016/S1872-5805(21)60084-7

二维B、N掺杂炭片的电化学氧化及其赝电容性能

doi: 10.1016/S1872-5805(21)60084-7
基金项目: 国家自然科学基金(222075038,21875028);辽宁省兴辽英才计划(XLYC1902045)
详细信息
    作者简介:

    胡友仁,硕士研究生。E-mail:xshyr@mail.dlut.edu.cn

    通讯作者:

    李文翠,博士,教授。E-mail:wencuili@dlut.edu.cn

  • 中图分类号: TQ152

Electrochemical oxidation of 2D B, N-doped carbon nanosheets for pseudocapacitance property

Funds: National Natural Science Foundation of China (222075038, 21875028); Liao Ning Revitalization Talents Program (XLYC1902045)
More Information
  • 摘要: 在炭基电极材料中引入氧化还原赝电容是提升其比电容的有效手段,有望解决炭基超级电容器低能量密度的瓶颈问题。本文通过原位电化学氧化,在B、N掺杂二维纳米炭片电极上引入电化学活性含氧官能团,以显著提升炭基电极的赝电容,并研究了B、N掺杂炭在不同氧化工艺下的表面组成和电容性能变化。结果表明,B、N掺杂可以提升氧化电极的电子传输和电荷转移,有效促进电化学氧化效果,提高电极的赝电容。此外,相比于恒压氧化工艺,循环伏安氧化方法可以有效提升炭电极的氧化深度和总氧含量,并且也有利于选择性地生成以电化学活性的醌基为主的含氧官能团。制备的氧化电极在1 A·g−1电流密度下显示出601.5 F·g−1的高比电容,并在20 A·g−1下仍保持74.8%,显示出良好的倍率性能。此外,氧化电极还表现出优异的循环稳定性,在5 A·g−1下8000次循环后保持了初始电容的92.6%。
  • 图  1  BNCS的(a)合成示意图及(b-c)SEM、(d)TEM照片

    Figure  1.  (a) The schematic diagram of synthesis and (b-c) SEM, (d) TEM images of BNCS.

    图  2  (a)循环伏安氧化、(b)恒压氧化、(c)恒压-循环伏安组合氧化的E-t曲线和I-t曲线

    Figure  2.  E-t curves and I-t curves of (a) cyclic voltammetry oxidation, (b) constant potential oxidation and (c) combination of constant potential and cyclic voltammetry oxidation.

    图  3  不同氧化条件制备的BNCS氧化电极在三电极体系下的1 M H2SO4中的电化学测试:BNCS-CV-5、BNCS-CV-10、BNCS-CV-20氧化电极a) 在10 mV·s−1下的CV曲线、b) 1 A·g−1下的GC曲线和c) 电化学阻抗谱;BNCS-CP-10、BNCS-CP-30和BNCS-CB-10*3氧化电极d) 在10 mV·s−1下的CV曲线和e) 1 A·g−1下的GC曲线和f) 电化学阻抗谱

    Figure  3.  Electrochemical evaluation of oxidized BNCS electrodes prepared under different oxidation conditions measured in a three-electrode system in 1 M H2SO4: a) CV curves at 10 mV·s−1, b) GC curves at 1 A·g−1 and c) EIS curves of BNCS-CV-5, BNCS-CV-10 and BNCS-CV-20 electrodes; d) CV curves at 10 mV·s−1, e) GC curves at 1 A·g−1 and f) EIS curves of BNCS-CP-10, BNCS-CP-30 and BNCS-CB-10*3 electrodes.

    图  4  CS-CV-5氧化电极和BNCS电极在三电极体系下1 M H2SO4中的电化学测试:a) 10 mV·s−1的CV曲线;b) 1 A·g−1下的GC曲线;c) 电化学阻抗谱;

    Figure  4.  Electrochemical evaluation of CS-CV-5 and BNCS electrodes measured in a three-electrode system in 1 M H2SO4: (a) CV curves at 10 mV·s−1. (b) GC curves at 1 A·g−1. (c) EIS curves.

    图  5  BNCS、BNCS-CV-10和BNCS-CP-30的(a) FTIR、(b) XPS全谱和XPS (c) C1s、(d) O1s、(e) N1s分峰拟合图谱

    Figure  5.  (a) FTIR spectra, (b) XPS spectra, as well as high-resolution XPS spectra of (c) C1s, (d) O1s and (e) N1s of the BNCS-5, AC-2-5-5, AC-2-20-5 and AC electrodes.

    图  6  氧化电极在三电极体系下1 M H2SO4中的倍率与循环测试:(a) BNCS-CV-10和BNCS-CP-30电极0.5~20 A·g−1下的倍率性能测试;(b) BNCS-CV-10电极在5 A·g−1下的循环稳定性测试

    Figure  6.  Rate and cycling test of oxidized electrodes measured in a three-electrode system in 1 M H2SO4:(a) Rate performances of BNCS-CV-10 and BNCS-CP-30 electrodes from 0.5 to 20 A·g−1. (b) Cycling performance of BNCS-CV-10 electrode at 5 A·g−1.

    表  1  BNCS、BNCS-CV-10和BNCS-CP-30电极元素分析与XPS表征测定的元素含量

    Table  1.   Elemental contents of the BNCS, BNCS-CV-10 and BNCS-CP-30 electrodes obtained by elemental analysis and XPS.

    SampleElemental AnalysisXPS
    C wt.%H wt.%N wt.%O wt.%C at. %B at. %N at. %O at. %F at. %
    BNCS90.21.21.27.480.851.453.417.097.2
    BNCS-CV-1083.11.01.114.970.980.513.9717.966.58
    BNCS-CP-3085.40.91.212.673.580.62.7716.276.77
    下载: 导出CSV

    表  2  BNCS、BNCS-CV-10和BNCS-CP-30电极C1s、O1s、N1s分峰拟合结果中各类官能团相对含量

    Table  2.   The relative contents of functional groups of the BNCS, BNCS-CV-10 and BNCS-CP-30 electrodes calculated by the XPS C1s, O1s, N1s fitting peak area.

    SampleC1s/at. %O1s/at. %N1s/at. %
    ―COOHC=OC―O/C―N―COOHC―OHC=ON―QN―5N―6
    BNCS3.82.715.132.87.259.921.337.840.9
    BNCS-CV-106.67.415.329.021.449.614.778.46.9
    BNCS-CP-307.64.218.340.938.021.116.071.013.0
    下载: 导出CSV
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  • 收稿日期:  2021-06-04
  • 修回日期:  2021-06-10
  • 网络出版日期:  2021-07-16

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