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Microstructural Characterization of Dehydrogenated Products of the LiBH4-YH3 Composite

Published online by Cambridge University Press:  28 October 2014

Ji Woo Kim
Affiliation:
Department of Materials Science and Engineering, Seoul National University, Seoul 151–742, Republic of Korea High Temperature Energy Materials Research Center, Korea Institute of Science and Technology, Seoul 136–791, Republic of Korea
Kee-Bum Kim
Affiliation:
Department of Materials Science and Engineering, Seoul National University, Seoul 151–742, Republic of Korea High Temperature Energy Materials Research Center, Korea Institute of Science and Technology, Seoul 136–791, Republic of Korea
Jae-Hyeok Shim*
Affiliation:
High Temperature Energy Materials Research Center, Korea Institute of Science and Technology, Seoul 136–791, Republic of Korea
Young Whan Cho
Affiliation:
High Temperature Energy Materials Research Center, Korea Institute of Science and Technology, Seoul 136–791, Republic of Korea
Kyu Hwan Oh
Affiliation:
Department of Materials Science and Engineering, Seoul National University, Seoul 151–742, Republic of Korea
*
*Corresponding author. jhshim@kist.re.kr

Abstract

The dehydrogenated microstructure of the lithium borohydride-yttrium hydride (LiBH4-YH3) composite obtained at 350°C under 0.3 MPa of hydrogen and static vacuum was investigated by transmission electron microscopy combined with a focused ion beam technique. The dehydrogenation reaction between LiBH4 and YH3 into LiH and YB4 takes place under 0.3 MPa of hydrogen, which produces YB4 nano-crystallites that are uniformly distributed in the LiH matrix. This microstructural feature seems to be beneficial for rehydrogenation of the dehydrogenation products. On the other hand, the dehydrogenation process is incomplete under static vacuum, leading to the unreacted microstructure, where YH3 and YH2 crystallites are embedded in LiBH4 matrix. High resolution imaging confirmed the presence of crystalline B resulting from the self-decomposition of LiBH4. However, Li2B12H12, which is assumed to be present in the LiBH4 matrix, was not clearly observed.

Type
Materials Applications
Copyright
© Microscopy Society of America 2014 

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Footnotes

Present address: Battery R&D, LG Chem Research Park, Daejeon 305-738, Republic of Korea.

References

Barkhordarian, G., Klassen, T., Dornheim, M. & Bormann, R. (2007). Unexpected kinetic effect of MgB2 in reactive hydride composites containing complex borohydrides. J Alloy Compd 440, L18L21.CrossRefGoogle Scholar
Bosenberg, U., Doppiu, S., Mosegaard, L., Barkhordarian, G., Eigen, N., Borgschulte, A., Jensen, T., Cerenius, Y., Gutfleisch, O. & Klassen, T. (2007). Hydrogen sorption properties of MgH2–LiBH4 composites. Acta Mater 55, 39513958.CrossRefGoogle Scholar
Bösenberg, U., Ravnsbaek, D.B., Hagemann, H., D’Anna, V., Minella, C.B., Pistidda, C., Beek, W.V., Jensen, T.R., Bormann, R. & Dornheim, M. (2010). Pressure and temperature influence on the desorption pathway of the LiBH4-MgH2 composite system. J Phys Chem C 114, 1521215217.CrossRefGoogle Scholar
Friedrichs, O., Kim, J.W., Remhof, A., Buchter, F., Borgschulte, A., Wallacher, D., Cho, Y.W., Fichtner, M., Oh, K.H. & Züttel, A. (2009). The effect of Al on the hydrogen sorption mechanism of LiBH4 . Phys Chem Chem Phys 11, 15151520.CrossRefGoogle Scholar
Friedrichs, O., Kim, J.W., Remhof, A., Wallacher, D., Hoser, A., Cho, Y.W., Oh, K.H. & Zuttel, A. (2010). Core shell structure for solid gas synthesis of LiBD4 . Phys Chem Chem Phys 12, 46004603.CrossRefGoogle Scholar
Gennari, F.C. (2012). Improved hydrogen storage reversibility of LiBH4 destabilized by Y(BH4)3 and YH3 . Inter J Hydrogen Energy 37, 1889518903.CrossRefGoogle Scholar
Jin, S.A., Lee, Y.S., Shim, J.H. & Cho, Y.W. (2008). Reversible hydrogen storage in LiBH4-MH2 (M=Ce, Ca) composites. J Phys Chem C 112, 95209524.CrossRefGoogle Scholar
Kang, X.D., Wang, P., Ma, L.P. & Cheng, H.M. (2007). Reversible hydrogen storage in LiBH4 destabilized by milling with Al. Appl Phys A Mater Sci Process 89, 963966.CrossRefGoogle Scholar
Kim, J.W., Ahn, J.P., Jin, S.A., Lee, S.H., Chung, H.S., Shim, J.H., Cho, Y.W. & Oh, K.H. (2008). Microstructural evolution of NbF5-doped MgH2 exhibiting fast hydrogen sorption kinetics. J Power Sources 178, 373378.CrossRefGoogle Scholar
Kim, K.B., Shim, J.H., Cho, Y.W. & Oh, K.H. (2011). Pressure-enhanced dehydrogenation reaction of the LiBH4–YH3 composite. Chem Commun 47, 98319833.CrossRefGoogle ScholarPubMed
Kim, K.B., Shim, J.H., Oh, K.H. & Cho, Y.W. (2013). Role of early-stage atmosphere in the dehydrogenation reaction of the LiBH4-YH3 composite. J Phys Chem C 117, 80288031.CrossRefGoogle Scholar
Lim, J.H., Shim, J.H., Lee, Y.S., Cho, Y.W. & Lee, J. (2008). Dehydrogenation behavior of LiBH4/CaH2 composite with NbF5 . Scr Mater 59, 12511254.CrossRefGoogle Scholar
Lim, J.H., Shim, J.H., Lee, Y.S., Suh, J.Y., Cho, Y.W. & Lee, J. (2010). Rehydrogenation and cycle studies of LiBH4–CaH2 composite. Inter J Hydrogen Energy 35, 65786582.CrossRefGoogle Scholar
Mauron, P., Buchter, F., Friedrichs, O., Remhof, A., Bielmann, M., Zwicky, C.N. & Zuttel, A. (2008). Stability and reversibility of LiBH4 . J Phys Chem B 112, 906910.CrossRefGoogle ScholarPubMed
Nakagawa, T., Ichikawa, T., Hanada, N., Kojima, Y. & Fujii, H. (2007). Thermal analysis on the Li-Mg-B-H systems. J Alloy Compd 446–447, 306309.CrossRefGoogle Scholar
Orimo, S., Nakamori, Y., Kitahara, G., Miwa, K., Ohba, N., Towata, S. & Züttel, A. (2005). Dehydriding and rehydriding reactions of LiBH4 . J Alloy Compd 404–406, 427430.CrossRefGoogle Scholar
Pinkerton, F.E. & Meyer, M.S. (2008). Reversible hydrogen storage in the lithium borohydride-calcium hydride coupled system. J Alloy Compd 464, L1L4.CrossRefGoogle Scholar
Pinkerton, F.E., Meyer, M.S., Meisner, G.P., Balogh, M.P. & Vajo, J.J. (2007). Phase boundaries and reversibility of LiBH4/MgH2 hydrogen storage material. J Phys Chem C 111, 1288112885.CrossRefGoogle Scholar
Shim, J.H., Lim, J.H., Rather, S.U., Lee, Y.S., Reed, D., Kim, Y., Book, D. & Cho, Y.W. (2010). Effect of hydrogen back pressure on dehydrogenation behavior of LiBH4-based reactive hydride composites. J Phys Chem Lett 1, 5963.CrossRefGoogle Scholar
Vajo, J.J., Skeith, S.L. & Mertens, F. (2005). Reversible storage of hydrogen in destabilized LiBH4 . J Phys Chem B 109, 37193722.CrossRefGoogle ScholarPubMed
Yang, J., Sudik, A. & Wolverton, C. (2007). Destabilizing LiBH4 with a metal (M=Mg, Al, Ti, V, Cr, or Sc) or metal hydride (MH2=MgH2, TiH2, or CaH2). J Phys Chem C 111, 1913419140.CrossRefGoogle Scholar
Yu, X.B., Grant, D.M. & Walker, G.S. (2006). A new dehydrogenation mechanism for reversible multicomponent borohydride systems – The role of Li-Mg alloys. Chem Commun 37, 39063908.CrossRefGoogle Scholar
Züttel, A., Wenger, P., Rentsch, S., Sudan., P., Mauron, P. & Emmenegger, C. (2003). LiBH4 a new hydrogen storage material. J Power Sources 50, 17.CrossRefGoogle Scholar
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