Electrochemical hydrogen storage properties of ball-milled NdMg12 alloy with Ni powders

Wang, Yi, Qiao, Shizhang and Wang, Xin (2008) Electrochemical hydrogen storage properties of ball-milled NdMg12 alloy with Ni powders. International Journal of Hydrogen Energy, 33 3: 1023-1027. doi:10.1016/j.ijhydene.2007.11.020


Author Wang, Yi
Qiao, Shizhang
Wang, Xin
Title Electrochemical hydrogen storage properties of ball-milled NdMg12 alloy with Ni powders
Formatted title
Electrochemical hydrogen storage properties of ball-milled NdMg12 alloy with Ni powders
Journal name International Journal of Hydrogen Energy   Check publisher's open access policy
ISSN 0360-3199
Publication date 2008-02-01
Year available 2008
Sub-type Article (original research)
DOI 10.1016/j.ijhydene.2007.11.020
Open Access Status
Volume 33
Issue 3
Start page 1023
End page 1027
Total pages 5
Editor T. Nejat Vezlroglu
Place of publication Oxford UK
Publisher Pergamon Press
Language eng
Subject C1
090402 Catalytic Process Engineering
850606 Hydrogen Storage
Abstract The electrochemical characteristics of the ball-milled NdMg12 alloys with Ni powders were investigated. The first discharge capacity of the ball-milled sample was improved from 770 to 1200 mAh/g when the Ni content in the alloy was increased from 150 to 200 wt%. Furthermore, the first discharge capacity of the ball-milled Ni composite was very close to that of the ball-milled Ni composite. However, the high rate dischargeability of the former was not as good as that of the latter. Further analysis by electrochemical impedance spectroscopy (EIS) technique reveals a larger reaction resistance in the ball-milled Ni composite, probably due to the formation of Nd oxide or Nd(OH)3 film on the surface of alloy. Larger reaction resistance resulted in the lower high rate dischargeability of this sample. In addition, the ball-milled Ni composite exhibited better cycle performance due to the existence of the corrosion resistant Nd oxide or Nd(OH)3 film.
Keyword Electrochemical hydrogen storage
Rare earth-Mg alloys
Reaction resistance
Cycle performance
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID 1(RG40/05)
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
Australian Institute for Bioengineering and Nanotechnology Publications
 
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Created: Thu, 09 Apr 2009, 23:11:52 EST by Mrs Jennifer Brown on behalf of Aust Institute for Bioengineering & Nanotechnology