NDLI: A one-step, cost-effective green method to <i>in situ</i> fabricate Ni(OH)<sub>2</sub> hexagonal platelets on Ni foam as binder-free supercapacitor electrode materials

Content Provider	Royal Society of Chemistry (RSC)
Author	Xu, Jing McLarnon, Frank Pan, Fusheng Zhang, Jie Wei, Zidong Lei, Jinglei Li, Lingjie Li, Nianbing
Copyright Year	2015
Abstract	Nickel hydroxide (Ni(OH)2) is considered to be a promising alternative to the expensive and toxic RuO2 electrode material for high-performance supercapacitors; however, the fabrication method and electrochemical performance of suitable Ni(OH)2 structures are unsatisfactory. In the present work, a facile, cost-effective green method is developed to in situ fabricate Ni(OH)2 hexagonal platelets on Ni foam as a binder-free supercapacitor electrode with high performance. The Ni(OH)2 hexagonal platelets are self-grown on three-dimensional (3D) Ni foam by a one-step hydrothermal treatment of Ni foam in a 15 wt% H2O2 aqueous solution without the use of nickel salts, acids, bases, or post-treatments. The as-prepared Ni(OH)2 hexagonal platelets-Ni foam (HNF) electrode can be used directly as a supercapacitor electrode material, thereby avoiding the need for binders and conducting agents. The Ni(OH)2 hexagonal platelets demonstrate high capacitance (2534 F g−1 at a scan rate of 1 mV s−1) and excellent cycling stability (97% capacitance retention after 2000 cycles at a scan rate of 50 mV s−1). The fabrication method developed here has the significant advantage of low-cost, facile, green, and additive-free processing, and it is therefore a promising route for preparing self-supported metal (hydr)oxide electrodes for high-performance supercapacitors and other energy-storage devices.
Starting Page	1953
Ending Page	1960
Page Count	8
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	3
Issue Number	5
Journal	Journal of Materials Chemistry A
DOI	10.1039/c4ta05156d
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Hydroxide Electrode Electrochemistry Supercapacitor Three-dimensional space Hydrothermal synthesis Hydrogen peroxide Nickel Capacitance
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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