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Flexible supercapacitors based on vertical graphene/carbon fabric with high rate performance

Yao, Zehan LU ; Quan, Baogang ; Yang, Tianzhong ; Li, Junjie and Gu, Changzhi (2023) In Applied Surface Science 610.
Abstract

Vertical graphene (VG) is a remarkable electrode material for supercapacitors due to its large specific area, open channel structures, and numerous exposed edges with high electrochemical activity. However, flexible supercapacitors with high rate performance based on VG have yet to be investigated. Here, we report flexible supercapacitors based on VG, carbon fabric (CF) current collector, and H2SO4 gel polymer electrolyte. VG/CF presents an exceptional electrochemical performance in H2SO4 compared with other aqueous and liquid ion electrolytes. The flexible VG/CF supercapacitor demonstrates a 73% capacitance retention after increasing the charge-discharge rate by 200 times from 0.1 mA... (More)

Vertical graphene (VG) is a remarkable electrode material for supercapacitors due to its large specific area, open channel structures, and numerous exposed edges with high electrochemical activity. However, flexible supercapacitors with high rate performance based on VG have yet to be investigated. Here, we report flexible supercapacitors based on VG, carbon fabric (CF) current collector, and H2SO4 gel polymer electrolyte. VG/CF presents an exceptional electrochemical performance in H2SO4 compared with other aqueous and liquid ion electrolytes. The flexible VG/CF supercapacitor demonstrates a 73% capacitance retention after increasing the charge-discharge rate by 200 times from 0.1 mA cm−2 to 20 mA cm−2. This high rate performance facilitates a high power density of 13.2 mW cm−2 with an energy density of 86.6 μWh cm−2. Furthermore, the electrochemical performances remain mostly unchanged after long-term charge-discharge cycles and mechanical bending. Our results demonstrate a flexible VG/CF supercapacitor with outstanding rate performance and stability for innovative high power energy and electronic devices.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Flexible supercapacitors, High rate performance, Vertical graphene
in
Applied Surface Science
volume
610
article number
155535
publisher
Elsevier
external identifiers
  • scopus:85141796651
ISSN
0169-4332
DOI
10.1016/j.apsusc.2022.155535
language
English
LU publication?
yes
id
c068b892-6694-4c79-89be-f26a30f723a1
date added to LUP
2023-01-23 16:02:03
date last changed
2023-11-19 06:37:03
@article{c068b892-6694-4c79-89be-f26a30f723a1,
  abstract     = {{<p>Vertical graphene (VG) is a remarkable electrode material for supercapacitors due to its large specific area, open channel structures, and numerous exposed edges with high electrochemical activity. However, flexible supercapacitors with high rate performance based on VG have yet to be investigated. Here, we report flexible supercapacitors based on VG, carbon fabric (CF) current collector, and H<sub>2</sub>SO<sub>4</sub> gel polymer electrolyte. VG/CF presents an exceptional electrochemical performance in H<sub>2</sub>SO<sub>4</sub> compared with other aqueous and liquid ion electrolytes. The flexible VG/CF supercapacitor demonstrates a 73% capacitance retention after increasing the charge-discharge rate by 200 times from 0.1 mA cm<sup>−2</sup> to 20 mA cm<sup>−2</sup>. This high rate performance facilitates a high power density of 13.2 mW cm<sup>−2</sup> with an energy density of 86.6 μWh cm<sup>−2</sup>. Furthermore, the electrochemical performances remain mostly unchanged after long-term charge-discharge cycles and mechanical bending. Our results demonstrate a flexible VG/CF supercapacitor with outstanding rate performance and stability for innovative high power energy and electronic devices.</p>}},
  author       = {{Yao, Zehan and Quan, Baogang and Yang, Tianzhong and Li, Junjie and Gu, Changzhi}},
  issn         = {{0169-4332}},
  keywords     = {{Flexible supercapacitors; High rate performance; Vertical graphene}},
  language     = {{eng}},
  month        = {{02}},
  publisher    = {{Elsevier}},
  series       = {{Applied Surface Science}},
  title        = {{Flexible supercapacitors based on vertical graphene/carbon fabric with high rate performance}},
  url          = {{http://dx.doi.org/10.1016/j.apsusc.2022.155535}},
  doi          = {{10.1016/j.apsusc.2022.155535}},
  volume       = {{610}},
  year         = {{2023}},
}