|Improved reversible dehydrogenation properties of 2LiBH(4)-MgH2 composite by milling with graphitic carbon nitride|
|K. K. Wang; X. D. Kang; Y. J. Zhong; C. H. Hu; P. Wang
|Source Publication||International Journal of Hydrogen Energy
|Abstract||The 2LiBH(4)-MgH2 reactive hydride composite is a promising hydrogen storage system due to the combined high hydrogen capacity and relatively moderate reaction enthalpy. However, the sluggish de/rehydrogenation kinetics severely impedes its practical applications. In this study, graphitic carbon nitride (C3N4) as a metal-free additive was added to the 2LiBH(4)-MgH2 composite and examined with respect to the promoting effect on the hydrogen storage properties of the composite. Our study found that mechanically milling with small amount of C3N4 additive can eliminate the incubation period between two dehydrogenation steps and thus markedly enhance the dehydrogenation kinetics of the LiBH4-MgH2 composite. Further cyclic study found that the composite with C3N4 additive exhibits improved cyclic dehydrogenation property although it also shows capacity loss upon cycling, particularly in the second cycle. Combined dehydrogenation property, phase analysis and a series of designed experiments suggested that the C3N4 additive could react with both LiBH4 and MgH2 in heating process, and the resulting products may improve the reversible dehydrogenation property of the composite system. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.|
|description.department||[wang, kuikui] univ sci & technol china, hefei 230026, peoples r china. [wang, kuikui
; kang, xiangdong
; zhong, yujie
; wang, ping] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [hu, chaohao] guilin univ elect technol, guangxi key lab informat mat, guilin 541004, peoples r china.
; kang, xd (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.
Reactive Hydride Composite
Reactive Hydride Composite
Hydrogen Storage Material
K. K. Wang,X. D. Kang,Y. J. Zhong,et al. Improved reversible dehydrogenation properties of 2LiBH(4)-MgH2 composite by milling with graphitic carbon nitride[J]. International Journal of Hydrogen Energy,2014,39(25):13369-13374.
K. K. Wang,X. D. Kang,Y. J. Zhong,C. H. Hu,&P. Wang.(2014).Improved reversible dehydrogenation properties of 2LiBH(4)-MgH2 composite by milling with graphitic carbon nitride.International Journal of Hydrogen Energy,39(25),13369-13374.
K. K. Wang,et al."Improved reversible dehydrogenation properties of 2LiBH(4)-MgH2 composite by milling with graphitic carbon nitride".International Journal of Hydrogen Energy 39.25(2014):13369-13374.
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