Bioinspired fractal electrodes for solar energy storages

Thekkekara, L and Gu, M 2017, 'Bioinspired fractal electrodes for solar energy storages', Scientific Reports, vol. 7, 45585, pp. 1-9.


Document type: Journal Article
Collection: Journal Articles

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Title Bioinspired fractal electrodes for solar energy storages
Author(s) Thekkekara, L
Gu, M
Year 2017
Journal name Scientific Reports
Volume number 7
Article Number 45585
Start page 1
End page 9
Total pages 9
Publisher Nature Publishing Group
Abstract Solar energy storage is an emerging technology which can promote the solar energy as the primary source of electricity. Recent development of laser scribed graphene electrodes exhibiting a high electrical conductivity have enabled a green technology platform for supercapacitor-based energy storage, resulting in cost-effective, environment-friendly features, and consequent readiness for on-chip integration. Due to the limitation of the ion-accessible active porous surface area, the energy densities of these supercapacitors are restricted below ∼3 × 10 -3 Whcm -3 . In this paper, we demonstrate a new design of biomimetic laser scribed graphene electrodes for solar energy storage, which embraces the structure of Fern leaves characterized by the geometric family of space filling curves of fractals. This new conceptual design removes the limit of the conventional planar supercapacitors by significantly increasing the ratio of active surface area to volume of the new electrodes and reducing the electrolyte ionic path. The attained energy density is thus significantly increased to ∼10 -1 Whcm -3 - more than 30 times higher than that achievable by the planar electrodes with ∼95% coulombic efficiency of the solar energy storage. The energy storages with these novel electrodes open the prospects of efficient self-powered and solar-powered wearable, flexible and portable applications.
Subject Physical Sciences not elsewhere classified
Biochemistry and Cell Biology not elsewhere classified
Keyword(s) Micro-Supercapacitors
Films
Oxide
Electrolytes
Battery
Model
DOI - identifier 10.1038/srep45585
Copyright notice © The Author(s) 2017. Creative Commons Attribution 4.0 License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
ISSN 2045-2322
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