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Effects of volatilization of lithium on hydrogen storage characteristics of Mg–Ni–Li alloy

Published online by Cambridge University Press:  18 October 2019

Chih-Ting Wu
Department of Vehicle Engineering, Army Academy R.O.C., Jhongli, Taoyuan 32092, Taiwan
Jen-Hao Liu
Graduated of Institute of Material Science and Engineering, National Central University, Jhongli, Taoyuan 32001, Taiwan
Te-Hui Tsai*
Department of Mechanical Engineering, Army Academy R.O.C., Taoyuan 32092, Jhongli, Taiwan
a)Address all correspondence to this author. e-mail:
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Lithium was added to the hypereutectic Mg–Ni alloy to investigate the effect of volatilization of Li on the hydrogen storage characteristics of the eutectic Mg–Ni alloy at 300 °C. After fully activated at 300 °C, Li was almost completely volatilized and the structure of Li-containing Mg82Ni18 alloy was converted to the structure of Li-free Mg82Ni18 alloy, but hydrogen absorption capacity significantly decreased. This is because volatilization of Li weakened the bonding between eutectic Mg and Mg2Ni, lowering the catalytic effect of Mg2Ni on Mg. The decrease in hydrogen absorption capacity was more obvious with increasing Li content. In addition, experimental alloy in powder form could increase surface area, causing Li to volatilize at 300 °C.

Copyright © Materials Research Society 2019 

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Present Address: Army Academy R.O.C., Jhongli District, Taoyuan 32092, Taiwan.


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