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Fabrication of an arbitrary-shaped and nitrogen-doped graphene aerogel for highly compressible all solid-state supercapacitors

journal contribution
posted on 2017-09-21, 00:00 authored by Degang Jiang, C Li, Wenrong YangWenrong Yang, Jizhen Zhang, J Liu
Herein, we report a new template method for fabricating an arbitrary-shaped compressible nitrogen-doped graphene aerogel (GA). The as-prepared GA remains stable under a maximum compressive strain of 90% or after 50 compression/release cycles at a strain of 80%. The compressible nitrogen-doped GA is used as an electrode to fabricate an all solid-state graphene aerogel supercapacitor (GASC). The as-assembled GASC shows a specific capacitance of 150 F g -1 at a current density of 0.3 A g -1 and a long cycle life with 85.1% capacitance retention after 10000 cycles at 1 A g -1 . In addition, the compressible GASC displays stable electrochemical performance under different compressive strains (0%, 25%, 50% and 75%) or after 100 compression/release cycles under a compressive strain of 50%. The present work highlights the first example of fabricating an arbitrary-shaped compressible GA. Furthermore, the as-obtained GASC overcomes the limitation of previous work which required the assistance of other materials to maintain the mechanical properties. This simple template method for the fabrication of compressible and robust GA electrodes could have enormous potential for high performance compressible energy storage devices.

History

Journal

Journal of materials chemistry A

Volume

5

Issue

35

Pagination

18684 - 18690

Publisher

Royal Society of Chemistry

Location

Cambridge, Eng.

ISSN

2050-7488

eISSN

2050-7496

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2017, The Royal Society of Chemistry