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Cited 43 time in webofscience Cited 47 time in scopus
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Three-dimensionally assembled Graphene/alpha-MnO2 nanowire hybrid hydrogels for high performance supercapacitors

Authors
Tuan Sang TranTripathi, Kumud MalikaKim, Bit NaYou, In-KyuPark, Byung JunHan, Young HeeKim, TaeYoung
Issue Date
Dec-2017
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Keywords
Graphene; alpha-MnO2 nanowires; Composites; Supercapacitors; Energy storage
Citation
MATERIALS RESEARCH BULLETIN, v.96, pp.395 - 404
Journal Title
MATERIALS RESEARCH BULLETIN
Volume
96
Start Page
395
End Page
404
URI
https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/5391
DOI
10.1016/j.materresbull.2017.04.012
ISSN
0025-5408
Abstract
We present a facile hydrothermal method to produce graphene-metal oxide composite that offer synergistic effect of three-dimensional (3D) graphene and electroactive alpha-MnO2 nanowires to improve high energy storage capability in supercapacitors. The graphene/alpha-MnO2 nanowire hydrogel is prepared via a simple hydrothermal route, in which graphene and alpha-MnO2 nanowires are self-assembled into 3D macroporous network structures. An asymmetric supercapacitor device is fabricated by using graphene/alpha-MnO2 nanowire hydrogel as positive electrode and 3D graphene hydrogel as negative electrode in an aqueous Na2SO4 electrolyte. The asymmetric cell can be cycled in the wide voltage range of 0-2 V and exhibit a gravimetric energy density of 38 Wh kg(-1) with a maximum power density of 258 kW kg(-1). In addition, it shows a good cycle stability with similar to 94% capacitance retention after 1000 cycles. The graphene/alpha-MnO2 nanowires hybrid hydrogels may have great potential in developing energy storage devices with high energy and power densities. (C) 2017 Elsevier Ltd. All rights reserved.
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공과대학 > 신소재공학과 > 1. Journal Articles
산업·환경대학원 > 산업환경공학과 > 1. Journal Articles

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