skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Ni(OH){sub 2} nanoflakes electrodeposited on Ni foam-supported vertically oriented graphene nanosheets for application in asymmetric supercapacitors

Abstract

Highlights: • Ni(OH){sub 2}/vertically oriented graphene nanosheets (V-GNs) was prepared. • Ni(OH){sub 2}/V-GNs had enhanced specific capacitance, cycling reversibility and stability. • Performance of Ni(OH){sub 2}/GNs/NF-AC asymmetric supercapacitor was studied. - Abstract: Binderless Ni(OH){sub 2} nanoflakes grown on Ni foam (NF)-supported vertically oriented graphene nanosheets (V-GNs) has been fabricated as a positive electrode material for asymmetric supercapacitor (ASC), coupled with activated carbon (AC) as a counter electrode material. The introduction of V-GNs leads to dense growth of nanocrystalline β-Ni(OH){sub 2} that is confirmed by X-ray diffraction, transmission electron microscopic and scanning electron microscopic analyses. The electrochemical performances of the Ni(OH){sub 2}/GNs/NF electrode are characterized by cyclic voltammetry and charge–discharge tests, which exhibit high specific capacitance of 2215 F g{sup −1} at a scan current density of 2.3 A g{sup −1}, enhanced cycling stability and high rate capability. The Ni(OH){sub 2}/GNs/NF-AC-based ASC can achieve a cell voltage of 1.4 V and a specific energy density of 11.11 Wh kg{sup −1} at 0.5 mA cm{sup −2} with a nearly 100% coulombic efficiency at room temperature.

Authors:
; ; ; ;
Publication Date:
OSTI Identifier:
22345261
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 52; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CRYSTALS; EFFICIENCY; ELECTRIC POTENTIAL; ELECTRODEPOSITION; ELECTRODES; ELECTRONS; ENERGY DENSITY; GRAPHENE; NANOSTRUCTURES; NICKEL HYDROXIDES; SCANNING ELECTRON MICROSCOPY; VOLTAMETRY; X-RAY DIFFRACTION

Citation Formats

Wang, Xin, Liu, Jiyue, Wang, Yayu, Zhao, Cuimei, and Zheng, Weitao. Ni(OH){sub 2} nanoflakes electrodeposited on Ni foam-supported vertically oriented graphene nanosheets for application in asymmetric supercapacitors. United States: N. p., 2014. Web. doi:10.1016/J.MATERRESBULL.2013.12.051.
Wang, Xin, Liu, Jiyue, Wang, Yayu, Zhao, Cuimei, & Zheng, Weitao. Ni(OH){sub 2} nanoflakes electrodeposited on Ni foam-supported vertically oriented graphene nanosheets for application in asymmetric supercapacitors. United States. https://doi.org/10.1016/J.MATERRESBULL.2013.12.051
Wang, Xin, Liu, Jiyue, Wang, Yayu, Zhao, Cuimei, and Zheng, Weitao. 2014. "Ni(OH){sub 2} nanoflakes electrodeposited on Ni foam-supported vertically oriented graphene nanosheets for application in asymmetric supercapacitors". United States. https://doi.org/10.1016/J.MATERRESBULL.2013.12.051.
@article{osti_22345261,
title = {Ni(OH){sub 2} nanoflakes electrodeposited on Ni foam-supported vertically oriented graphene nanosheets for application in asymmetric supercapacitors},
author = {Wang, Xin and Liu, Jiyue and Wang, Yayu and Zhao, Cuimei and Zheng, Weitao},
abstractNote = {Highlights: • Ni(OH){sub 2}/vertically oriented graphene nanosheets (V-GNs) was prepared. • Ni(OH){sub 2}/V-GNs had enhanced specific capacitance, cycling reversibility and stability. • Performance of Ni(OH){sub 2}/GNs/NF-AC asymmetric supercapacitor was studied. - Abstract: Binderless Ni(OH){sub 2} nanoflakes grown on Ni foam (NF)-supported vertically oriented graphene nanosheets (V-GNs) has been fabricated as a positive electrode material for asymmetric supercapacitor (ASC), coupled with activated carbon (AC) as a counter electrode material. The introduction of V-GNs leads to dense growth of nanocrystalline β-Ni(OH){sub 2} that is confirmed by X-ray diffraction, transmission electron microscopic and scanning electron microscopic analyses. The electrochemical performances of the Ni(OH){sub 2}/GNs/NF electrode are characterized by cyclic voltammetry and charge–discharge tests, which exhibit high specific capacitance of 2215 F g{sup −1} at a scan current density of 2.3 A g{sup −1}, enhanced cycling stability and high rate capability. The Ni(OH){sub 2}/GNs/NF-AC-based ASC can achieve a cell voltage of 1.4 V and a specific energy density of 11.11 Wh kg{sup −1} at 0.5 mA cm{sup −2} with a nearly 100% coulombic efficiency at room temperature.},
doi = {10.1016/J.MATERRESBULL.2013.12.051},
url = {https://www.osti.gov/biblio/22345261}, journal = {Materials Research Bulletin},
issn = {0025-5408},
number = ,
volume = 52,
place = {United States},
year = {Tue Apr 01 00:00:00 EDT 2014},
month = {Tue Apr 01 00:00:00 EDT 2014}
}