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Hydrogen storage properties of MgH2-SiC composites

Journal Article


Abstract


  • This paper describes the effects of the addition of SiC on the hydrogen storage properties of MgH2 synthesized by ball milling. Transmission electron microscope images confirm that ultra-fine SiC particles are uniformly dispersed within the MgH2 matrix. It was found that the hydrogen absorbtion/desorption kinetics of MgH2 can be improved by the addition of a small amount of SiC (5 wt%). Higher level doping introduces negative effects, such as lower capacity, slower absorption/desorption rates, and higher hysteresis, compared to samples with lower SiC doping levels. It is believed that SiC can help to break up particles, reduce the grain size, and improve the surgace area of MgH2, however, large amounts of SiC could also block the hydrogen diffusion path to some extent, which degrades the hydrogen absorption/desorption performance.

Publication Date


  • 2009

Citation


  • Ranjbar, A., Guo, Z., Yu, X., Wexler, D., Calka, A., Kim, C. J. & Liu, H. K. (2009). Hydrogen storage properties of MgH2-SiC composites. Materials Chemistry and Physics, 114 (1), 168-172.

Scopus Eid


  • 2-s2.0-58149308508

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/3447

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 168

End Page


  • 172

Volume


  • 114

Issue


  • 1

Abstract


  • This paper describes the effects of the addition of SiC on the hydrogen storage properties of MgH2 synthesized by ball milling. Transmission electron microscope images confirm that ultra-fine SiC particles are uniformly dispersed within the MgH2 matrix. It was found that the hydrogen absorbtion/desorption kinetics of MgH2 can be improved by the addition of a small amount of SiC (5 wt%). Higher level doping introduces negative effects, such as lower capacity, slower absorption/desorption rates, and higher hysteresis, compared to samples with lower SiC doping levels. It is believed that SiC can help to break up particles, reduce the grain size, and improve the surgace area of MgH2, however, large amounts of SiC could also block the hydrogen diffusion path to some extent, which degrades the hydrogen absorption/desorption performance.

Publication Date


  • 2009

Citation


  • Ranjbar, A., Guo, Z., Yu, X., Wexler, D., Calka, A., Kim, C. J. & Liu, H. K. (2009). Hydrogen storage properties of MgH2-SiC composites. Materials Chemistry and Physics, 114 (1), 168-172.

Scopus Eid


  • 2-s2.0-58149308508

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/3447

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 168

End Page


  • 172

Volume


  • 114

Issue


  • 1