期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 42, 期 31, 页码 20046-20055出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2017.05.060
关键词
Hydrogen storage materials; LiBH4; Graphene; Surface interaction; Modification effect
资金
- National Natural Science Foundation of China [51571179, 51671173]
- Program for Innovative Research Team in University of Ministry of Education of China [IRT13037]
- Key Science and Technology Innovation Team of Zhejiang Province [2015C31035]
LiBH4 is a promising hydrogen storage material for its large capacity. However, high desorption temperature, sluggish kinetics and demanding rehydrogenation severely hinder its practical use. Surface functional groups of graphene in many cases are treated as effective approaches to obtain some kinds of excellent properties of energy storage materials. In the current work, a new facile and effective strategy to improve the reversible hydrogen desorption properties of LiBH4 is proposed by composing with functionalized graphene to form the LiBH4-fluorographene composite. The fluorographene (FG) nano sheets are successfully exfoliated from fluorographite (FGi) and composed with LiBH4. It is demonstrated that the FG can remarkably improve the hydrogen desorption thermodynamics, kinetics and reversibility of LiBH4 via reactant destabilization method. An extremely fast hydrogen desorption process with a high capacity of 8.2 wt.% at 148.1 degrees C is achieved in the LiBH4-50FG composite. Further research reveals that the enhancement actually roots in the strengthened interfacial interaction between LiBH4 and exfoliated FG. Moreover, it is confirmed that the LiBH4-40FG composite exhibits a significantly enhanced reversible hydrogen desorption capacity of 7.2 wt.% and LiBH4 is regenerated. Such enhanced reversible hydrogen desorption properties are ascribed to the strengthened interfacial interactions between LiBH4 and FG with large surface, as well as the formation of LiHxF1-x phase. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据