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Effect of CeH2.29 on the microstructures and hydrogen properties of LiBH4-Mg2NiH4 composites

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Abstract

A composite of LiBH4-Mg2NiH4 doped with 10wt% CeH2.29 was prepared by ball milling followed by dynamic interspace vacuum treatment at 573 K. The introduction of CeH2.29 caused a transformation in the morphology of Mg from complex spongy and lamellar to uniformly spongy, resulting in refined particle size and abundant H diffusion pathways. This LiBH4-Mg2NiH4 + 10wt% CeH2.29 composite exhibited excellent hydrogen storage properties. The starting temperature of rapid H absorption decreased to 375 K in the doped composite from 452 K for the unmodified material, and the onset decomposition temperature of its hydride was reduced from 536 K to 517 K. In addition, the time required for a hydrogen release of 1.5wt% (at 598 K) was 87 s less than that of the un-doped composite.

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Authors and Affiliations

  1. Hebei Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, 066004, China

    Xin Zhao, Shu-min Han, Yuan Li, Xiao-cui Chen & Dan-dan Ke

  2. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, P. R. China

    Xin Zhao & Shu-min Han

Authors
  1. Xin Zhao
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  2. Shu-min Han
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  3. Yuan Li
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  4. Xiao-cui Chen
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  5. Dan-dan Ke
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Correspondence to Shu-min Han.

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Zhao, X., Han, Sm., Li, Y. et al. Effect of CeH2.29 on the microstructures and hydrogen properties of LiBH4-Mg2NiH4 composites. Int J Miner Metall Mater 22, 423–428 (2015). https://doi.org/10.1007/s12613-015-1089-8

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  • DOI: https://doi.org/10.1007/s12613-015-1089-8

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