Supercapacitors based on nitrogen-enriched crumpled graphene with a high volumetric capacitance and high-mass-loading per area of the electrode

YU Qiong; WANG Yong-zhi; MENG Meng; SHEN Shu-ling; TANG Zhi-hong; YANG Jun-he

doi:10.1016/S1872-5805(22)60599-7

Volume 37 Issue 3

Jun. 2022

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Article Navigation > New Carbon Mater. > 2022 > 37(3): 575-584

YU Qiong, WANG Yong-zhi, MENG Meng, SHEN Shu-ling, TANG Zhi-hong, YANG Jun-he. Supercapacitors based on nitrogen-enriched crumpled graphene with a high volumetric capacitance and high-mass-loading per area of the electrode. New Carbon Mater., 2022, 37(3): 575-584. doi: 10.1016/S1872-5805(22)60599-7

Citation:

YU Qiong, WANG Yong-zhi, MENG Meng, SHEN Shu-ling, TANG Zhi-hong, YANG Jun-he. Supercapacitors based on nitrogen-enriched crumpled graphene with a high volumetric capacitance and high-mass-loading per area of the electrode. New Carbon Mater., 2022, 37(3): 575-584. doi: 10.1016/S1872-5805(22)60599-7

Citation:

YU Qiong, WANG Yong-zhi, MENG Meng, SHEN Shu-ling, TANG Zhi-hong, YANG Jun-he. Supercapacitors based on nitrogen-enriched crumpled graphene with a high volumetric capacitance and high-mass-loading per area of the electrode. New Carbon Mater., 2022, 37(3): 575-584. doi: 10.1016/S1872-5805(22)60599-7

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Supercapacitors based on nitrogen-enriched crumpled graphene with a high volumetric capacitance and high-mass-loading per area of the electrode

doi: 10.1016/S1872-5805(22)60599-7

School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

More Information

Author Bio:
于　琼. E-mail：2388860345@qq.com
Corresponding author: TANG Zhi-hong, Associate Professor. E-mail: zhtang@usst.edu.cn
Received Date: 2020-11-18
Rev Recd Date: 2021-04-10

Available Online: 2022-01-05

Publish Date: 2022-06-01

Abstract

Abstract

The low volumetric capacity and sluggish diffusion of ions at high mass loadings of active materials per area limit any improvement of the energy and power densities of supercapacitors. A mixture of graphene oxide (GO) and urea in water was treated by an ultrasonic atomizer to form aerosol droplets, which were dried to obtain crumpled GO/urea particles. Crumpled graphene with a nitrogen content of 11.38% was obtained by the thermal shocking of these particles at 600 °C for 50 s. A volumetric capacitance of 384.0 F cm⁻³ was achieved when the crumpled graphene was used as supercapacitor electrodes. Even at a high current density (10 A g⁻¹) and a high loading (74.3 mg/cm² electrode), the specific capacitance retention still remained high. It is proposed that N-doping in the forms of pyrrole, imide, lactam and other types of pyridine-like nitrogen, and high surface area of the sample were key factors in improving the capacitance. The crumpled structure provided high mass transfer and high accessibility of ions to the active surface.
- Crumpled graphene,
- Nitrogen,
- Heat shock,
- Supercapacitor

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References(36)

References

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