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

Yi Wang; Shizhang Qiao; Xin Wang

doi:10.1016/j.ijhydene.2008.06.038

Electrochemical hydrogen storage properties of the ball-milled PrMg_12-xNi_x + 150 wt% Ni (x = 1 and 2) composites

Yi Wang, Shizhang Qiao, Xin Wang

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

36 Citations (Scopus)

Abstract

The electrochemical hydrogen storage properties of the ball-milled PrMg_12-xNi_x + 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. © 2008 International Association for Hydrogen Energy.

Original language	English
Pages (from-to)	5066-5072
Journal	International Journal of Hydrogen Energy
Volume	33
Issue number	19
DOIs	https://doi.org/10.1016/j.ijhydene.2008.06.038
Publication status	Published - Oct 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]

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Research Keywords

Ball-milling
Cycle performance
Electrochemical hydrogen storage
High-rate dischargeability

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

abstract = "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. {\textcopyright} 2008 International Association for Hydrogen Energy.",

keywords = "Ball-milling, Cycle performance, Electrochemical hydrogen storage, High-rate dischargeability",

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

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]",

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TY - JOUR

T1 - Electrochemical hydrogen storage properties of the ball-milled PrMg12-xNix + 150 wt% Ni (x = 1 and 2) composites

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]

PY - 2008/10

Y1 - 2008/10

N2 - 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. © 2008 International Association for Hydrogen Energy.

AB - 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. © 2008 International Association for Hydrogen Energy.

KW - Ball-milling

KW - Cycle performance

KW - Electrochemical hydrogen storage

KW - High-rate dischargeability

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U2 - 10.1016/j.ijhydene.2008.06.038

DO - 10.1016/j.ijhydene.2008.06.038

M3 - RGC 21 - Publication in refereed journal

SN - 0360-3199

VL - 33

SP - 5066

EP - 5072

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 19

ER -