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Study on the structure and hydrogen storage characteristics of as-cast La0.7Mg0.3Ni3.2Co0.35−XCuX alloys

✍ Scribed by Huang Taizhong; Wu Zhu; Han Jitian; Sun Guoxin; Yu Jiemei; Cao Xianqi; Xu Naixin; Zhang Yihe

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
313 KB
Volume
35
Category
Article
ISSN
0360-3199

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✦ Synopsis

In this paper, the structure, hydrogen storage performance, electrochemical discharge and cyclic characteristics of La 0.7 Mg 0.3 Ni 3.2 Co 0.35ÀX Cu X alloys were investigated using X-ray diffraction (XRD), pressure composition isotherm (PCT) and electrochemical tests. XRD tests showed that all of the alloys were composed of La 2 Ni 7 and LaNi phases. The ratio of LaNi phase in these alloys increased with increasing substitution of Cu for Co. PCT tests showed that increasing substitution of Cu for Co resulted in the decrease of hydrogen storage capacity and the increase of plateau pressure. Electrochemical discharge tests showed that the discharge capacity increased first and then decreased with increasing substitution of Cu for Co.

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