Improved hydrogen storage properties in Mg-based thin films by tailoring structures |
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| Authors: | Jianglan Qu Bo Sun Yang Liu Rong Yang Yaoqi Li Xingguo Li |
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| Affiliation: | 1. Beijing National Laboratory for Molecular Sciences (BNLMS), The State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;2. College of Engineering, Peking University, Beijing 100871, China |
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| Abstract: | We prepared Mg-based thin films by magnetron sputtering and presented a comparative and systematic study in their structural, optical and electrical characteristics. We built a thin film model to investigate their hydrogen absorption and desorption kinetics in ambient air, as well as chemical and electrical switching behaviors by analyzing transmittance and resistance data. The remarkably enhanced kinetics was achieved by preparing the sandwich-like structured film. The Pd–Mg–Pd film was found to exhibit better gasochromic, chemochromic and electrochromic properties, which could be attributed to the enhanced cooperation effect and more extended Mg–Pd interfaces. The structural effect of kinetics in thin films shed light on how to further improve the hydrogen storage performance in bulk Mg-based materials. |
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| Keywords: | Hydrogen storage Hydrogen absorption Hydrogen desorption Thin films Magnesium |
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