Destabilization of LiBH4 by SrF2 for reversible hydrogen storage

被引：13
|
作者：
Zhao, S. X. [1 ]
Wang, C. Y. [1 ]
Liu, D. M. [1 ]
Tan, Q. J. [1 ]
Li, Y. T. [1 ]
Si, T. Z. [1 ]
机构：
[1] Anhui Univ Technol, Sch Mat Sci & Engn, Maanshan 243002, Anhui, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2018年 / 43卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Lithium borohydride; Reactive hydride system; Hydrogen storage properties; Reaction mechanism; TERNARY-HYDRIDE SYSTEM; DEHYDROGENATION REACTION; COMPOSITE; STABILITY; DECOMPOSITION; MECHANISM;
D O I：
10.1016/j.ijhydene.2018.01.154
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The de-/rehydrogenation features of the 6LiBH(4)/SrF2 reactive hydride system have been systematically investigated. It was found that the thermal stability of LiBH4 can be reduced markedly by combining it with SrF2. Dehydrogenation of the 6LiBH(4)/SrF2 system proceeds via the 6LiBH(4) + SrF2 -> SrB6 + 2LiF + 4LiH + 10H(2) reaction, which involves SrH2 as the intermediate product. The dehydrogenation enthalpy change was experimentally determined to be 52 kJ/mol H-2 based on the P-C isotherm analysis. For rehydrogenation, LiBH4 and SrF2 were regenerated along with LiSrH3 at 450 degrees C under -8 MPa hydrogen pressure; thus, approximately 5.2 wt% of hydrogen can be released during the second dehydrogenation process. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：5098 / 5103
页数：6
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