Electrochemical hydrogen storage properties of the ball-milled PrMg12-xNix + 150 wt% Ni (x = 1 and 2) composites

Wang, Yi, Qiao, Shizhang and Wang, Xin (2008). Electrochemical hydrogen storage properties of the ball-milled PrMg12-xNix + 150 wt% Ni (x = 1 and 2) composites. In: M.-S. Kim, C.-Y. Lin, J. Miyake and J. W. Kim, International Journal of Hydrogen Energy. 2nd Asian Bio-Hydrogen Symposium, Daejeon, South Korea, (5066-5072). November 2007. doi:10.1016/j.ijhydene.2008.06.038


Author Wang, Yi
Qiao, Shizhang
Wang, Xin
Title of paper Electrochemical hydrogen storage properties of the ball-milled PrMg12-xNix + 150 wt% Ni (x = 1 and 2) composites
Conference name 2nd Asian Bio-Hydrogen Symposium
Conference location Daejeon, South Korea
Conference dates November 2007
Proceedings title International Journal of Hydrogen Energy   Check publisher's open access policy
Journal name International Journal of Hydrogen Energy   Check publisher's open access policy
Place of Publication Oxford, England
Publisher Pergamon-Elsevier Science
Publication Year 2008
Year available 2008
Sub-type Fully published paper
DOI 10.1016/j.ijhydene.2008.06.038
Open Access Status DOI
ISSN 0360-3199
Editor M.-S. Kim
C.-Y. Lin
J. Miyake
J. W. Kim
Volume 33
Issue 19
Start page 5066
End page 5072
Total pages 7
Language eng
Abstract/Summary The electrochemical hydrogen storage properties of the ball-milled PrMg12−xNix + 150 wt% Ni (x = 1 and 2) composites were investigated, and compared with those of the ball-milled PrMg12 + 150 wt% Ni composite. The ball-milled PrMg11Ni–Ni composite has the highest initial discharge capacity (973 mAh/g) and high-rate dischargeability (HRD). The cycle life improves with the increase of Ni content, which was confirmed by the XRD results of the ball-milled composites after 10 cycles. By means of electrochemical impedance spectra, linear polarization and anodic polarization measurements, the electrochemical kinetic parameters were studied. It is suggested that the high hydrogen diffusivity and moderate reaction resistance are responsible for the higher discharge capacity and HRD of the PrMg11Ni–Ni sample, while the lower discharge capacity and HRD of the PrMg10Ni2–Ni sample is probably due to the excessively high reaction resistance.
Subjects 100708 Nanomaterials
850606 Hydrogen Storage
Keyword Ball-milling
Electrochemical hydrogen storage
High-rate dischargeability
Cycle performance
Q-Index Code E1
Q-Index Status Confirmed Code

 
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Created: Thu, 09 Apr 2009, 23:19:48 EST by Mrs Jennifer Brown on behalf of Aust Institute for Bioengineering & Nanotechnology