Destabilization of LiBH4 by mixing with LiNH2

M. Aoki, K. Miwa, T. Noritake, G. Kitahara, Y. Nakamori, Shin-Ichi Orimo, S. Towata

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Abstract

It was revealed that LiBH4 is destabilized by mixing with LiNH2 and the mixture desorbs a large amount of hydrogen. First-principles calculations predicted that the enthalpies of dehydrogenation for LiBH4 alone and the mixture of LiBH 4∈+∈2∈LiNH2 are 75 kJ/molH2 and 23 kJ/molH2, respectively. Motivated by this prediction, we experimentally examined the dehydrogenation properties for LiBH4 and the mixture under hydrogen pressure. The amounts of desorbed hydrogen from LiBH4 and the mixture at 703 K and 522 K were 10.6 mass∈% and 7.8 mass∈%, respectively. The dehydrogenation pressure of the mixture was much higher than that of LiBH4 alone, although the mixture was measured at approximately 180 K lower temperature. This result suggests that the mixture is much unstable as compared with LiBH4 alone.

Original languageEnglish
Pages (from-to)1409-1412
Number of pages4
JournalApplied Physics A: Materials Science and Processing
Volume80
Issue number7
DOIs
Publication statusPublished - 2005 Apr 1

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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    Aoki, M., Miwa, K., Noritake, T., Kitahara, G., Nakamori, Y., Orimo, S-I., & Towata, S. (2005). Destabilization of LiBH4 by mixing with LiNH2. Applied Physics A: Materials Science and Processing, 80(7), 1409-1412. https://doi.org/10.1007/s00339-004-3194-9