AC impedance studies of the discharge process of a Mg2Ni-type hydrogen storage alloy electrode in 6M KOH solution

1998 ◽  
Vol 265 (1-2) ◽  
pp. 305-310 ◽  
Author(s):  
N Cui ◽  
J.L Luo
Keyword(s):  
Hydrogen Storage ◽  
Ac Impedance ◽  
Hydrogen Storage Alloy ◽  
Alloy Electrode ◽  
Discharge Process

Microstructure and Self-Discharge Characteristic of Ti-Zr-V-Cr-Ni-Ce Hydrogen Storage Electrode Alloy

2012 ◽  
Vol 512-515 ◽  
pp. 1409-1412
Author(s):  
Yu Qing Qiao ◽  
Min Shou Zhao ◽  
Li Min Wang
Keyword(s):  
Hydrogen Storage ◽  
Discharge Capacity ◽  
The Other ◽  
Hydrogen Storage Alloy ◽  
Alloy Electrode ◽  
Irreversible Capacity ◽  
Discharge Characteristics ◽  
Discharge Characteristic ◽  
Capacity Loss ◽  
Eis Measurements

Microstructure and self-discharge characteristics of Ti-Zr-V-Cr-Ni-Ce hydrogen storage electrode have been investigated by XRD, FESEM-EDS and EIS measurements. Self-discharge properties indicate that the irreversible capacity loss is negative, which is different from that of AB5 alloy electrode. The capacity loss can be divided in two parts, one is due to the deterioration of the hydrogen storage alloy, which will result in the decrease of discharge capacity, and the other is due to the continually activated, which will result in the increase of discharge capacity.

scholarly journals Influence of Temperature on Discharge Process of Misch Metal-Based Hydrogen Storage Alloy Electrodes

2002 ◽  
Vol 70 (1) ◽  
pp. 2-7 ◽  
Author(s):  
Chiaki IWAKURA ◽  
Hiroshi SENOH ◽  
Kohji MORIMOTO ◽  
Yasutaka HARA ◽  
Hiroshi INOUE
Keyword(s):  
Hydrogen Storage ◽  
Hydrogen Storage Alloy ◽  
Discharge Process ◽  
Influence Of Temperature ◽  
Misch Metal ◽  
Influence Of Temperature On

scholarly journals Investigation on the Structure and Electrochemical Properties of La-Ce-Mg-Al-Ni Hydrogen Storage Alloy

2013 ◽  
Vol 2013 ◽  
pp. 1-6
Author(s):  
Yuqing Qiao ◽  
Jianyi Xi ◽  
Minshou Zhao ◽  
Guangjie Shao ◽  
Yongchun Luo ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Discharge Capacity ◽  
Current Density ◽  
Electrochemical Impedance ◽  
Type Structure ◽  
Hydrogen Storage Alloy ◽  
Alloy Electrode ◽  
Electrochemical Characteristics ◽  
Transfer Resistance ◽  
Discharge Current Density

Structure and electrochemical characteristics of La0.96Ce0.04Mg0.15Al0.05Ni2.8hydrogen storage alloy have been investigated. X-ray diffraction analyses reveal that the La0.96Ce0.04Mg0.15Al0.05Ni2.8hydrogen storage alloy consisted of a (La, Mg)Ni3phase with the rhombohedral PuNi3-type structure and a LaNi5phase with the hexagonal CaCu5-type structure. TEM shows that the alloy is multicrystal with a lattice space 0.187 nm. EDS analyse shows that the content of Mg is 3.48% (atom) which coincide well with the designed composition of the electrode alloy. Electrochemical investigations show that the maximum discharge capacity of the alloy electrode is 325 mAh g−1. The alloy electrode has higher discharge capacity within the discharge current density span from 60 mA g−1to 300 mA g−1. Electrochemical impedance spectroscopy measurements indicate that the charge transfer resistanceRTon the alloy electrode surface and the calculated exchange current densityI0are 0.135 Ω and 1298 mA g−1, respectively; the better eletrochemical reaction kinetic of the alloy electrode may be responsible for the better high-rate dischargeability.

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