Hydrogen desorption properties of MgH2-TiCr1.2Fe0.6 nanocomposite prepared by high-energy mechanical alloying

被引:40
作者
Mahmoudi, Nafiseh [1 ]
Kaflou, A. [2 ]
Simchi, A. [1 ,3 ]
机构
[1] Sharif Univ Technol, Dept Mat Sci & Engn, Tehran 14588, Iran
[2] Iranian Res Org Sci & Technol, Inst Adv Mat & Renewable Energy, Tehran, Iran
[3] Sharif Univ Technol, Inst Nanosci & Nanotechnol, Tehran 14588, Iran
关键词
Hydrogen storage materials; Magnesium hydride; Mechanical alloying; Nanostructures; Ti-Cr-Fe alloy; STORAGE PROPERTIES; MAGNESIUM HYDRIDE; FE; NI; SORPTION; DEHYDROGENATION; CAPACITY; NB2O5;
D O I
10.1016/j.jpowsour.2011.01.001
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, high-energy mechanical alloying (MA) was employed to synthesize a nanostructured magnesium-based composite for hydrogen storage. The preparation of the composite material with composition of MgH2-5 at% (TiCr1.2Fe0.6) was performed by co-milling of commercial available MgH2 powder with the body-centered cubic (bcc) alloy either in the form of Ti-Cr-Fe powder mixture with the proper mass fraction (sample A) or prealloyed TiCr1.2Fe0.6 powder (sample B). The prealloyed powder with an average crystallite size of 14 nm and particle size of 384 nm was prepared by the mechanical alloying process. It is shown that the addition of the Ti-based bcc alloy to magnesium hydride yields a finer particle size and grain structure after mechanical alloying. As a result, the desorption temperature of mechanically activated MgH2 for 4h decreased from 327 degrees C to 262 degrees C for sample A and 241 degrees C for sample B. A high dehydrogenation capacity (similar to 5 wt%) at 300 degrees C is also obtained. The effect of the Ti-based alloy on improvement of the dehydrogenation is discussed. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码:4604 / 4608
页数:5
相关论文
共 34 条
[1]   Synthesis process of Mg-Ti BCC alloys by means of ball milling [J].
Asano, Kohta ;
Enoki, Hirotoshi ;
Akiba, Etsuo .
JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 486 (1-2) :115-123
[2]   Effect of Nb2O5 content on hydrogen reaction kinetics of Mg [J].
Barkhordarian, G ;
Klassen, T ;
Bormann, R .
JOURNAL OF ALLOYS AND COMPOUNDS, 2004, 364 (1-2) :242-246
[3]   Dehydrogenation of TiH2 [J].
Bhosle, V ;
Baburaj, EG ;
Miranova, M ;
Salama, K .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2003, 356 (1-2) :190-199
[4]   Review on hydrogen absorbing materials - structure, microstructure, and thermodynamic properties [J].
Bououdina, M ;
Grant, D ;
Walker, G .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2006, 31 (02) :177-182
[5]   Hydrogen absorption-desorption properties of Ti0.32Cr0.43V0.25 alloy [J].
Cho, Sung-Wook ;
Shim, Gunchoo ;
Choi, Good-Sun ;
Park, Choong-Nyeon ;
Yoo, Jeong-Hyun ;
Choi, Jeon .
JOURNAL OF ALLOYS AND COMPOUNDS, 2007, 430 (1-2) :136-141
[6]  
CHO SW, 2009, J ALLOY COMPD, V288, P294
[7]  
DALTOE S, 2004, MAT SCI ENG B, V108, P24
[8]   Effect of La/Ni ratio on hydrogen storage properties of Mg-Ni-La system prepared by hydriding combustion synthesis followed by mechanical milling [J].
Gu, Hao ;
Zhu, Yunfeng ;
Li, Liquan .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2008, 33 (12) :2970-2974
[9]   Hydrogen storage properties of Mg76Ti12Fe12-xNix (x=0, 4, 8, 12) alloys by mechanical alloying [J].
Guo, Jin ;
Yang, Kun ;
Xu, Liqin ;
Liu, Yixin ;
Zhou, Kaiwen .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2007, 32 (13) :2412-2416
[10]  
HUOT J, 2003, J ALLOY COMPD, V603, P356