Role of graphene on hierarchical flower-like NiAl layered double hydroxide-nickel foam-graphene as binder-free electrode for high-rate hybrid supercapacitor
- Title
- Role of graphene on hierarchical flower-like NiAl layered double hydroxide-nickel foam-graphene as binder-free electrode for high-rate hybrid supercapacitor
- Author
- 이해원
- Keywords
- Hybrid supercapacitor; Layered double hydroxide; Nickel foam; Graphene; Energy density
- Issue Date
- 2016-06
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Citation
- INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v. 41, NO 22, Page. 9443-9453
- Abstract
- In this work, a facile two-step hydrothermal method was reported to grow hierarchical flower-like NiAl layered double hydroxide (LDH) directly on 3D nickel foam (NF) which was further coated with 2D graphene nanosheets (GNS) layers as binder-free supercapacitor electrode. The positive and negative effects of GNS on the electrochemical performance of LDH-NF electrode were investigated in detail. The prepared LDH-NF/GNS electrode maintained an enhanced specific capacity of 165.6 C g(-1) after 4000 cycles at a high current density of 40 A g(-1). Furthermore, a hybrid supercapacitor, with LDH-NF/GNS and GNS-NF as the positive and negative electrodes, achieved an energy density (31.5 Wh kg(-1) at a power density of 400 W kg(-1)) and super long-term cycle stability (a specific capacity of 67.2 C g(-1) at 5 A g(-1) after 5000 cycles with 80% retention). This study not only opens up the possibility of engineering LDH-NF/GNS into a promising electrode, but also highlights the positive and negative roles of GNS on LDH-NF as binder-free electrodes for further development of high-performance supercapacitors. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
- URI
- https://www.sciencedirect.com/science/article/pii/S0360319916303494?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/72319
- ISSN
- 0360-3199; 1879-3487
- DOI
- 10.1016/j.ijhydene.2016.04.050
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > CHEMISTRY(화학과) > Articles
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