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Type: Journal article
Title: Bendable all-solid-state asymmetric supercapacitors based on MnO₂ and Fe₂O₃ thin films
Other Titles: Bendable all-solid-state asymmetric supercapacitors based on MnO(2) and Fe(2)O(3) thin films
Author: Chodankar, N.
Dubal, D.
Gund, G.
Lokhande, C.
Citation: Energy Technology: generation, conversion, storage, distribution, 2015; 3(6):625-631
Publisher: Wiley
Issue Date: 2015
ISSN: 2194-4288
Statement of
Nilesh R. Chodankar, Deepak P. Dubal, Girish S. Gund and Chandrakant D. Lokhande
Abstract: The growing interest in portable and consumable electronics demands efficient and low-cost energy storage devices with excellent flexibility and of light weight. We demonstrate flexible high-performance all-solid-state thin-film asymmetric supercapacitors (ASSTF-ASCs) using α-MnO₂ and α-Fe₂O₃ thin films as positive and negative electrodes, respectively. The as-fabricated ASSTF-ASC devices have excellent electrochemical performance with extended potential window of 2.0 V and excellent cycling stability for 2500 cycles. Impressively, an MnO₂//Fe₂O₃ asymmetric cell demonstrates high specific capacitance of 145 F g¯¹ with a high energy density of 41 Wh kg¯¹ while maintaining a power density of 2.1 kW kg¯¹. A parallel combination of two MnO₂//Fe₂O₃ asymmetric cells is able to illuminate a panel of 31 light emitting diodes (LEDs). These findings may offer new opportunities for the use of asymmetric configurations in energy storage devices for various portable electronic systems.
Keywords: Supercapacitors; electrolytes; energy storage; metal oxides; thin films
Rights: ©2015 Wiley-VCH Verlag GmbH &Co. KGaA,Weinheim
DOI: 10.1002/ente.201402213
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