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Structural and dehydriding properties of Ca(BH4)2

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Abstract

We have investigated the structural and dehydriding properties of Ca(BH4)2. It was found that Ca(BH4)2 undergoes a structural phase transformation from an orthorhombic low-temperature (LT) modification into a tetragonal high-temperature (HT) modification between 433 K and 523 K. The amount of hydrogen desorbed from Ca(BH4)2 during the pressure–composition (p–c) isotherm measurement was 5.9 mass%. This hydrogen desorption is caused by the partial dehydrogenation of Ca(BH4)2 accompanied by the formation of CaH2 and orthorhombic intermediate phases.

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Authors and Affiliations

  1. Toyota Central R&D Labs., Inc., Nagakute, Aichi, 480-1192, Japan

    M. Aoki, K. Miwa, T. Noritake, N. Ohba, M. Matsumoto & S. Towata

  2. Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan

    H.-W. Li, Y. Nakamori & S. Orimo

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  1. M. Aoki
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  2. K. Miwa
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  3. T. Noritake
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  4. N. Ohba
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  5. M. Matsumoto
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  6. H.-W. Li
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  7. Y. Nakamori
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  8. S. Towata
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  9. S. Orimo
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Correspondence to M. Aoki.

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Aoki, M., Miwa, K., Noritake, T. et al. Structural and dehydriding properties of Ca(BH4)2 . Appl. Phys. A 92, 601–605 (2008). https://doi.org/10.1007/s00339-008-4548-5

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  • DOI: https://doi.org/10.1007/s00339-008-4548-5

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