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 LiBH4 + 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.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
B. Bogdanović, M. Schwickardi: J. Alloys Compd. 253-254, 1 (1997)
C.M. Jensen, K.J. Gross: Appl. Phys. A 72, 213 (2001)
G. Sandrock, K. Gross, G. Thomas: J. Alloys Compd. 339, 299 (2002)
E.M. Fedneva, V.L. Alpatova, V.I. Mikheeva: Russ. J. Inorg. Chem. 9, 826 (1964)
A. Züttel, P. Wenger, S. Rentsch, P. Sudan, P. Mauron, C. Emmenegger: J. Power Sources 118, 1 (2003)
S. Orimo, Y. Nakamori, A. Züttel: Mater. Sci. Eng. B 108, 51 (2004)
K. Miwa, N. Ohba, S. Towata, Y. Naka-mori, S. Orimo: Phys. Rev. B 69, 245120 (2004)
P. Chen, Z. Xiong, J. Luo, J. Lin, K.L. Tan: Nature 420, 302 (2002)
P. Chen, Z. Xiong, J. Luo, J. Lin, K.L. Tan: J. Phys. Chem. B 107, 10967 (2003)
Y. Nakamori, S. Orimo: Mater. Sci. Eng. B 108, 48 (2004)
S. Orimo, Y. Nakamori, G. Kitahara, K. Miwa, N. Ohba, T. Noritake, S. Towata: Appl. Phys. A 79, 1765 (2004)
Y.H. Hu, E. Ruckenstein: Ind. Eng. Chem. Res. 42, 5135 (2003)
T. Ichikawa, S. Isobe, N. Hanada, H. Fujii: J. Alloys Compd. 356, 271 (2004)
Y.H. Hu, E. Ruckenstein: J. Phys. Chem. A 107, 9737 (2003)
T. Ichikawa, N. Hanada, S. Isobe, H. Leng, H. Fujii: J. Phys. Chem. B 108, 7887 (2004)
Y. Nakamori, M. Ninomiya, G. Kitahara, K. Miwa, S. Towata, S. Orimo: (to be submitted)
D. Vanderbilt: Phys. Rev. B 41, 7892 (1990); K. Laasonen, A. Pasquarello, R. Car, C. Lee, D. Vanderbilt: ibid. 47, 10142 (1993)
P. Hohenberg, W. Kohn: Phys. Rev. 136, B 864 (1964); W. Kohn, L.J. Sham: ibid. 140, A1133 (1965)
J.P. Perdew, K. Burke, M. Ernzerhof: Phys. Rev. Lett. 77, 3865 (1996); ibid. 78, 1396(E) (1997)
M.B. Smith, G.E. Bass Jr.: J. Chem. Eng. Data 8, 342 (1963)
H. Yamane, S. Kikkawa, M. Koizumi: J. Solid State Chem. 71, 1 (1987)
R.H. Wentorf Jr.: J. Chem. Phys. 34, 809 (1961)
Author information
Authors and Affiliations
Corresponding author
Additional information
PACS
81.05.Zx; 71.20.Ps; 82.30.-b
Rights and permissions
About this article
Cite this article
Aoki, M., Miwa, K., Noritake, T. et al. Destabilization of LiBH4 by mixing with LiNH2. Appl. Phys. A 80, 1409–1412 (2005). https://doi.org/10.1007/s00339-004-3194-9
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00339-004-3194-9