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  A micromolding method for transparent and flexible thin-film supercapacitors and hybrid supercapacitors

Liu, T., Yan, R., Huang, H., Pan, L., Cao, X., deMello, A., et al. (2020). A micromolding method for transparent and flexible thin-film supercapacitors and hybrid supercapacitors. Advanced Functional Materials, 30(46): 2004410. doi:10.1002/adfm.202004410.

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 Creators:
Liu, Tian, Author
Yan, Runyu1, Author              
Huang, Haijian, Author
Pan, Long, Author
Cao, Xiaobao, Author
deMello, Andrew, Author
Niederberger, Markus, Author
Affiliations:
1Martin Oschatz, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2364733              

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Free keywords: flexible supercapacitors, micromolding, porous carbon, transparent hybrid supercapacitor, transparent supercapacitors
 Abstract: Thin-film supercapacitors are promising candidates for energy storage in wearable electronics due to their mechanical flexibility, high power density, long cycling life, and fast-charging capability. In addition to all of these features, device transparency would open up completely new opportunities in wearable devices, virtual reality or in heads-up displays for vehicle navigation. Here a method is introduced for micromolding Ag/porous carbon and Ag/NixFeyOz@reduced graphene oxide (rGO) into grid-like patterns on polyethylene terephthalate foils to produce transparent thin-film supercapacitors and hybrid supercapacitors. The supercapacitor delivers a high areal capacitance of 226.8 µF cm−2 at a current density of 3 µA cm−2 and with a transparency of 70.6%. The cycling stability is preserved even after 1000 cycles under intense bending. A hybrid supercapacitor is additionally fabricated by integrating two electrodes of Ag/porous carbon and Ag/NixFeyOz@rGO. It offers an areal capacitance of 282.1 µF cm−2 at a current density of 3 µA cm−2, a transparency of 73.3% and the areal capacitance only decreases slightly under bending. This work indicates that micromolding of nano- and micro-sized powders represents a powerful method for preparing regular electrode patterns, which are fundamental for the development of transparent energy storage devices.

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Language(s): eng - English
 Dates: 2020-09-092020
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1002/adfm.202004410
BibTex Citekey: doi:10.1002/adfm.202004410
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Title: Advanced Functional Materials
  Other : Adv. Funct. Mater.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH Verlag GmbH
Pages: - Volume / Issue: 30 (46) Sequence Number: 2004410 Start / End Page: - Identifier: ISSN: 1616-301X