Effect of ball milling time on the hydrogen storage properties of TiF3-doped LiAlH4

被引：97

作者：

Liu, Shu-Sheng ^{[1
,3
]}

Sun, Li-Xian ^{[1
]}

Zhang, Yao ^{[1
]}

Xu, Fen ^{[2
]}

Zhang, Jian ^{[1
]}

Chu, Hai-Liang ^{[1
]}

Fan, Mei-Qiang ^{[1
]}

Zhang, Tao ^{[1
]}

Song, Xiao-Yan ^{[4
]}

Grolier, Jean Pierre ^{[5
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, Mat & Thermochem Lab, Dalian 116023, Liaoning, Peoples R China

[2] Liaoning Normal Univ, Fac Chem & Chem Engn, Dalian 116029, Peoples R China

[3] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

[4] Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Chinese Educ Minist, Beijing 100124, Peoples R China

[5] Univ Blaise Pascal, Lab Thermodynam Solut & Polymers, F-63177 Aubiere, France

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2009年 / 34卷 / 19期

基金：

中国国家自然科学基金;

关键词：

Hydrogen storage; TiF3; LiAlH4; Ball milling time; ALUMINUM-HYDRIDE; RELEASE; STABILITY; CATALYSTS; TIF3; TRANSFORMATIONS; DECOMPOSITION; PERFORMANCE; ZR;

D O I：

10.1016/j.ijhydene.2009.07.090

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：

In the present work, the catalytic effect of TiF3 on the dehydrogenation properties of LiAlH4 has been investigated. Decomposition of LiAlH4 occurs during ball milling in the presence of 4 mol% TiF3. Different ball milling times have been used, from 0.5 h to 18 h. With ball milling time increasing, the crystallite sizes of LiAlH4 get smaller (from 69 nm to 43 nm) and the dehydrogenation temperature becomes lower (from 80 degrees C to 60 degrees C). Half an hour ball milling makes the initial dehydrogenation temperature of doped LiAlH4 reduce to 80 degrees C, which is 70 degrees C lower than as-received LiAlH4. About 5.0 wt.% H-2 can be released from TiF3-doped LiAlH4 after 18 h ball milling in the range of 60 degrees C-145 degrees C (heating rate 2 degrees C min(-1)). TiF3 probably reacts with LiAlH4 to form the catalyst, TiAl3. The mechanochemical and thermochemical reactions have been clarified. However, the rehydrogenation of LiAlH4/Li3AlH6 can not be realized under 95 bar H-2 in the presence of TiF3 because of their thermodynamic properties. (C) 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.

引用

页码：8079 / 8085

页数：7

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