Electrochemical oxidation of 2D B, N-codoped carbon nanosheets to improve their pseudo-capacitance

HU You-ren; DONG Xiao-ling; HOU Lu; ZHUANG Hong-kun; LI Wen-cui

doi:10.1016/S1872-5805(21)60084-7

Volume 36 Issue 6

Dec. 2021

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Article Navigation > New Carbon Mater. > 2021 > 36(6): 1109-1117

HU You-ren, DONG Xiao-ling, HOU Lu, ZHUANG Hong-kun, LI Wen-cui. Electrochemical oxidation of 2D B, N-codoped carbon nanosheets to improve their pseudo-capacitance. New Carbon Mater., 2021, 36(6): 1109-1117. 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-codoped carbon nanosheets to improve their pseudo-capacitance. New Carbon Mater., 2021, 36(6): 1109-1117. doi: 10.1016/S1872-5805(21)60084-7

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Electrochemical oxidation of 2D B, N-codoped carbon nanosheets to improve their pseudo-capacitance

doi: 10.1016/S1872-5805(21)60084-7

School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China

Funds: National Natural Science Foundation of China (222075038, 21875028); Liao Ning Revitalization Talents Program (XLYC1902045).

More Information

Corresponding author: LI Wen-cui, Professor. E-mail: wencuili@dlut.edu.cn
Received Date: 2021-06-04
Rev Recd Date: 2021-06-28

Available Online: 2021-07-16

Publish Date: 2021-12-01

Abstract

Abstract

Introducing redox pseudocapacitance could effectively improve the specific capacitance of carbon-based electrode materials, and is a promising way to overcome the low energy density of carbon-based supercapacitors. An in-situ electrochemical oxidation method was used to electrochemically generate active oxygen-containing functional groups for B, N co-doped carbon nanosheets to significantly increase the pseudocapacitance. Results show that the degree of oxidation, the pseudocapacitance, and the charge transfer rate of the oxidized carbon nanosheets were effectively increased by co-doping with B and N. Compared with the constant potential oxidation method, the cyclic voltammetry oxidation method was more effective in increasing the total oxygen content of the oxidized electrode and to selectively generate electrochemically active quinone groups. The oxidized electrode had a high specific capacitance of 601.5 F g⁻¹ at a current density of 1 A g⁻¹, retaining 74.8% of the original value at 20 A g⁻¹, revealing a favorable rate capability. The oxidized electrode also had excellent cycle stability, retaining 92.6% of the initial capacitance after 8 000 cycles at 5 A g⁻¹.
- Heteroatomic doping,
- Electrochemical oxidation,
- Carbon-based electrodes,
- Oxygen-containing functional groups,
- Supercapacitors

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References(26)

References

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