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Effect of rare earth element substitution for lanthanum on structure and electrochemical characteristic of La0.8Mg0.2Ni3.3Al0.3Mo0.2 hydrogen storage alloys
The microstructure and electrochemical properties of La0.8−xMg0.2RExNi3.3Al0.3Mo0.2(x = 0.1; RE = Ce, Nd, Pr, Y, Gd, and Er) hydrogen storage electrode alloys have been investigated systematically. The results of X-ray diffraction show that the matrix phase structure of the alloys is composed of the LaNi5 phase and the La2Ni7 phase. The partial substitution of Lanthanum by rare earth elements can improve the cell volume of the LaNi5 phase. The electrochemical properties of the alloys are improved obviously. The maximum discharge capacity is improved with Ce, Nd, Pr, Er, and Y substitution. Er and Y substitution promote the cyclic durability of the alloy. Nd and Pr can improve the high-rate ability of the alloy electrodes. The electrochemical impedance spectroscopy test shows that the charge-transfer resistance at the surface of the alloy electrodes decreases obviously with Nd and Pr substitution.
Effect of rare earth element substitution for lanthanum on structure and electrochemical characteristic of La0.8Mg0.2Ni3.3Al0.3Mo0.2 hydrogen storage alloys
The microstructure and electrochemical properties of La0.8−xMg0.2RExNi3.3Al0.3Mo0.2(x = 0.1; RE = Ce, Nd, Pr, Y, Gd, and Er) hydrogen storage electrode alloys have been investigated systematically. The results of X-ray diffraction show that the matrix phase structure of the alloys is composed of the LaNi5 phase and the La2Ni7 phase. The partial substitution of Lanthanum by rare earth elements can improve the cell volume of the LaNi5 phase. The electrochemical properties of the alloys are improved obviously. The maximum discharge capacity is improved with Ce, Nd, Pr, Er, and Y substitution. Er and Y substitution promote the cyclic durability of the alloy. Nd and Pr can improve the high-rate ability of the alloy electrodes. The electrochemical impedance spectroscopy test shows that the charge-transfer resistance at the surface of the alloy electrodes decreases obviously with Nd and Pr substitution.
Effect of rare earth element substitution for lanthanum on structure and electrochemical characteristic of La0.8Mg0.2Ni3.3Al0.3Mo0.2 hydrogen storage alloys
Li, Shucun (author) / Guo, Chengxiao (author) / Wen, Bingquan (author) / Yin, Weiqiang (author) / Sha, Ou (author)
2017-07-01
9 pages
Article (Journal)
Electronic Resource
English
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