Exaggerated capacitance using electrochemically active nickel foam as current collector in electrochemical measurement

Xing, W, Qiao, SZ, Wu, XZ, Gao, XL, Zhou, J, Zhuo, SP, Hartono, SB and Hulicova-Jurcakova, D (2011) Exaggerated capacitance using electrochemically active nickel foam as current collector in electrochemical measurement. Journal of Power Sources, 196 8: 4123-4127. doi:10.1016/j.jpowsour.2010.12.003


Author Xing, W
Qiao, SZ
Wu, XZ
Gao, XL
Zhou, J
Zhuo, SP
Hartono, SB
Hulicova-Jurcakova, D
Title Exaggerated capacitance using electrochemically active nickel foam as current collector in electrochemical measurement
Journal name Journal of Power Sources   Check publisher's open access policy
ISSN 0378-7753
1873-2755
Publication date 2011-04-15
Year available 2010
Sub-type Article (original research)
DOI 10.1016/j.jpowsour.2010.12.003
Open Access Status Not yet assessed
Volume 196
Issue 8
Start page 4123
End page 4127
Total pages 5
Place of publication Lausanne, Switzerland
Publisher Elsevier S. A.
Language eng
Subject 2105 Renewable Energy, Sustainability and the Environment
2102 Energy Engineering and Power Technology
1606 Physical and Theoretical Chemistry
2208 Electrical and Electronic Engineering
Abstract In the past decades, nickel and cobalt oxide/hydroxide materials have been investigated intensively for supercapacitor applications. Some works report very high specific capacitance values, up to 3152 F g(-1), for these materials. By contrast, some other works report quite modest capacitance values, up to 380 F g(-1) for the same materials prepared using same strategy. It is found that most works reporting very high capacitance value applied nickel foam as current collector. In this paper, surface chemistry and electrochemical properties of nickel foam are investigated by XPS analysis, cyclic voltammetry and galvanostatic charge-discharge measurement. The results show that using nickel foam as current collector can bring about substantial errors to the specific capacitance values of electrode materials, especially when small amount of electrode active material is used in the measurement. It is suggested that an electrochemically inert current collector such as Ti or Pt film should be used for testing electrochemical properties of nickel and cobalt oxide/hydroxide positive electrode materials. (C) 2010 Elsevier B.V. All rights reserved.
Formatted abstract
In the past decades, nickel and cobalt oxide/hydroxide materials have been investigated intensively for supercapacitor applications. Some works report very high specific capacitance values, up to 3152 F g-1, for these materials. By contrast, some other works report quite modest capacitance values, up to 380 F g-1 for the same materials prepared using same strategy. It is found that most works reporting very high capacitance value applied nickel foam as current collector. In this paper, surface chemistry and electrochemical properties of nickel foam are investigated by XPS analysis, cyclic voltammetry and galvanostatic charge-discharge measurement. The results show that using nickel foam as current collector can bring about substantial errors to the specific capacitance values of electrode materials, especially when small amount of electrode active material is used in the measurement. It is suggested that an electrochemically inert current collector such as Ti or Pt film should be used for testing electrochemical properties of nickel and cobalt oxide/hydroxide positive electrode materials.
© 2010 Elsevier B.V. All rights reserved.
Keyword Cyclic voltammetry
Nickel foam
Pseudocapacitance
Redox reaction
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID 2008BS09007
Y2008F36
2009GG10007006
DP1095861
Institutional Status UQ
Additional Notes Published under Short Communications. Available online 14 December 2010.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
Australian Institute for Bioengineering and Nanotechnology Publications
 
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Created: Wed, 09 Mar 2011, 23:14:05 EST by Dr Denisa Jurcakova on behalf of Aust Institute for Bioengineering & Nanotechnology