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

Yi Wang; Shizhang Qiao; Xin Wang

doi:10.1016/j.ijhydene.2007.11.020

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

Yi Wang, Shizhang Qiao, Xin Wang

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

29 Citations (Scopus)

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 NdMg₁₂ + 200 wt % Ni composite was very close to that of the ball-milled PrMg₁₂ + 200 wt % 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 NdMg₁₂ + 200 wt % 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 NdMg₁₂ + 200 wt % Ni composite exhibited better cycle performance due to the existence of the corrosion resistant Nd oxide or Nd (OH)₃ film. © 2007 International Association for Hydrogen Energy.

Original language	English
Pages (from-to)	1023-1027
Journal	International Journal of Hydrogen Energy
Volume	33
Issue number	3
DOIs	https://doi.org/10.1016/j.ijhydene.2007.11.020
Publication status	Published - Feb 2008
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

Cycle performance
Electrochemical hydrogen storage
Rare earth-Mg alloys
Reaction resistance

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Cite this

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title = "Electrochemical hydrogen storage properties of ball-milled NdMg12 alloy with Ni powders",

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 NdMg12 + 200 wt % Ni composite was very close to that of the ball-milled PrMg12 + 200 wt % 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 NdMg12 + 200 wt % 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 NdMg12 + 200 wt % Ni composite exhibited better cycle performance due to the existence of the corrosion resistant Nd oxide or Nd (OH)3 film. {\textcopyright} 2007 International Association for Hydrogen Energy.",

keywords = "Cycle performance, Electrochemical hydrogen storage, Rare earth-Mg alloys, Reaction resistance",

author = "Yi Wang and Shizhang Qiao and Xin Wang",

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TY - JOUR

T1 - Electrochemical hydrogen storage properties of ball-milled NdMg12 alloy with Ni powders

AU - Wang, Yi

AU - Qiao, Shizhang

AU - Wang, Xin

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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N2 - 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 NdMg12 + 200 wt % Ni composite was very close to that of the ball-milled PrMg12 + 200 wt % 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 NdMg12 + 200 wt % 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 NdMg12 + 200 wt % Ni composite exhibited better cycle performance due to the existence of the corrosion resistant Nd oxide or Nd (OH)3 film. © 2007 International Association for Hydrogen Energy.

AB - 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 NdMg12 + 200 wt % Ni composite was very close to that of the ball-milled PrMg12 + 200 wt % 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 NdMg12 + 200 wt % 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 NdMg12 + 200 wt % Ni composite exhibited better cycle performance due to the existence of the corrosion resistant Nd oxide or Nd (OH)3 film. © 2007 International Association for Hydrogen Energy.

KW - Cycle performance

KW - Electrochemical hydrogen storage

KW - Rare earth-Mg alloys

KW - Reaction resistance

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DO - 10.1016/j.ijhydene.2007.11.020

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JO - International Journal of Hydrogen Energy

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