Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/12997
Title: A one-step and binder-free method to fabricate hierarchical nickel-based supercapacitor electrodes with excellent performance
Authors: Zhang, G
Li, W
Xie, K
Yu, F
Huang, H 
Keywords: Anodization
Electrodes
Hierarchical materials
Nickel
Supercapacitors
Issue Date: 2013
Publisher: Wiley-VCH
Source: Advanced functional materials, 2013, v. 23, no. 29, p. 3675-3681 How to cite?
Journal: Advanced functional materials 
Abstract: Research is currently being carried out in the search for alternative electrode materials to replace the expensive and toxic RuO2-based electrode. As a typical example, nickel oxide or hydroxide has been widely studied but the results are far from satisfactory. Here, using a facile one-step anodization method, a hierarchical nickel compound (HNC) film with an interconnecting 3D nanoflake structure is obtained, providing large electrochemically active surface area and interconnecting nanoscale pore channels for ion transport. The HNC electrode demonstrates significantly improved capacitance, 70 times higher than the reported NiO-TiO2 nanotube array electrode with similar thickness. The charge/discharge kinetics are also superior, showing only a 24% capacitance reduction when the scan rate is increased by 50 times, as compared with the typical 70% capacitance reduction for pseudocapacitor electrodes under the same conditions. HNC exhibits an extraordinary excellent cycle life; capacitance increases to 115% after 4500 test cycles. Furthermore, because HNC is in intimate contact with the current collector, it is not necessary to use conducting agents or binders, which reduces the electrode weight and facilitates the electrode preparation process. The method is low cost, facile, scalable, additive free, and is promising for fabricating supercapacitor electrode with excellent performance. A hierarchical nickel compound (HNC) film is prepared using a facile, one-step, and binder-free method. The HNC demonstrates both large capacitance and superior rate capability. The capacitance reduction is only 24%, even when the scan rate is increased by 50 times. The HNC also exhibits an excellent cycle life.
URI: http://hdl.handle.net/10397/12997
ISSN: 1616-301X
DOI: 10.1002/adfm.201203418
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

78
Last Week
0
Last month
3
Citations as of Aug 19, 2017

WEB OF SCIENCETM
Citations

77
Last Week
0
Last month
2
Citations as of Aug 21, 2017

Page view(s)

49
Last Week
3
Last month
Checked on Aug 21, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.