A mechanical-force-driven physical vapour deposition approach to fabricating complex hydride nanostructures

Yuepeng Pang, Yongfeng Liu (), Mingxia Gao, Liuzhang Ouyang, Jiangwen Liu, Hui Wang, Min Zhu and Hongge Pan ()
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Yuepeng Pang: State Key Laboratory of Silicon Materials, Zhejiang University
Yongfeng Liu: State Key Laboratory of Silicon Materials, Zhejiang University
Mingxia Gao: State Key Laboratory of Silicon Materials, Zhejiang University
Liuzhang Ouyang: School of Materials Science and Engineering and Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of Technology
Jiangwen Liu: School of Materials Science and Engineering and Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of Technology
Hui Wang: School of Materials Science and Engineering and Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of Technology
Min Zhu: School of Materials Science and Engineering and Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of Technology
Hongge Pan: State Key Laboratory of Silicon Materials, Zhejiang University

Nature Communications, 2014, vol. 5, issue 1, 1-9

Abstract: Abstract Nanoscale hydrides desorb and absorb hydrogen at faster rates and lower temperatures than bulk hydrides because of their high surface areas, abundant grain boundaries and short diffusion distances. No current methods exist for the direct fabrication of nanoscale complex hydrides (for example, alanates, borohydrides) with unique morphologies because of their extremely high reducibility, relatively low thermodynamic stability and complicated elemental composition. Here, we demonstrate a mechanical-force-driven physical vapour deposition procedure for preparing nanoscale complex hydrides without scaffolds or supports. Magnesium alanate nanorods measuring 20–40 nm in diameter and lithium borohydride nanobelts measuring 10–40 nm in width are successfully synthesised on the basis of the one-dimensional structure of the corresponding organic coordination polymers. The dehydrogenation kinetics of the magnesium alanate nanorods are improved, and the nanorod morphology persists through the dehydrogenation–hydrogenation process. Our findings may facilitate the fabrication of such hydrides with improved hydrogen storage properties for practical applications.

Date: 2014
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DOI: 10.1038/ncomms4519

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