Synergistic hydrogen desorption of HCS MgH2 + LiAlH4 composite

被引：26

作者：

Ding, Xiangqian ^{[1
]}

Zhu, Yunfeng ^{[1
]}

Wei, Lingjun ^{[1
]}

Li, Ying ^{[1
]}

Li, Liquan ^{[1
]}

机构：

[1] Nanjing Univ Technol, Coll Mat Sci & Engn, Nanjing 210009, Peoples R China

来源：

ENERGY | 2013年 / 55卷

基金：

中国国家自然科学基金;

关键词：

Hydriding combustion synthesis; MgH2; LiAlH4; Hydrogen storage; Destabilization mechanism; HYDRIDING COMBUSTION SYNTHESIS; STORAGE PROPERTIES; LIALH4; ENERGY; KINETICS; MG2NIH4; DESTABILIZATION; MECHANISM; SYSTEMS;

D O I：

10.1016/j.energy.2013.04.043

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

MgH2 was prepared by HCS (hydriding combustion synthesis) method, and the as-prepared product (HCS MgH2) was further combined with LiAlH4 by mechanical milling in order to form a new composite of HCS MgH2 + LiAlH4. Structural and hydrogen storage properties of the HCS MgH2 + LiAlH4 composite have been investigated systematically by XRD (X-ray diffraction), SEM (scanning electron microscope), DSC (differential scanning calorimetry) and hydrogenation/dehydrogenation measurements. A mutual destabilization effect has been observed between HCS MgH2 and LiAlH4 during hydrogen desorption. The dehydrogenation mechanism of the composite has been revealed. Compared with commercial MgH2 (Corn MgH2) + LiAlH4 composite, the HCS MgH2 + LiAlH4 composite shows more pronounced synergistic hydrogen desorption with notably decreased dehydrogenation temperature owing to the unique microstructures of the HCS MgH2, which may provide favorable channels for diffusion of hydrogen atoms and promote synergistic hydrogen desorption of the composite. The dehydrogenation barrier of the HCS MgH2 + LiAlH4 composite is lower than that of the Corn MgH2 + LiAlH4 composite. Moreover, the HCS MgH2 + LiAlH4 composite exhibits fast re-hydrogenation kinetics in the first two cycles. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：933 / 938

页数：6

共 36 条

[1] Hydrogen in magnesium: new perspectives toward functional stores [J].

Aguey-Zinsou, Kondo-Francois ;

Ares-Fernandez, Jose-Ramon .

ENERGY & ENVIRONMENTAL SCIENCE, 2010, 3 (05) :526-543

[2] Hydriding combustion synthesis for the production of hydrogen storage alloy [J].

Akiyama, T ;

Isogai, H ;

Yagi, J .

JOURNAL OF ALLOYS AND COMPOUNDS, 1997, 252 (1-2) :L1-L4

[3] Dehydrogenation kinetics of as-received and ball-milled LiAlH4 [J].

Andreasen, A ;

Vegge, T ;

Pedersen, AS .

JOURNAL OF SOLID STATE CHEMISTRY, 2005, 178 (12) :3672-3678

[4] Kinetics of phase change I - General theory [J].

Avrami, M .

JOURNAL OF CHEMICAL PHYSICS, 1939, 7 (12) :1103-1112

[5] Solid state phase transformations in LiAlH4 during high-energy ball-milling [J].

Balema, VP ;

Pecharsky, VK ;

Dennis, KW .

JOURNAL OF ALLOYS AND COMPOUNDS, 2000, 313 (1-2) :69-74

[6] Transition to renewable energy systems with hydrogen as an energy carrier [J].

Barbir, Frano .

ENERGY, 2009, 34 (03) :308-312

[7] Thermal desorption of hydrogen from magnesium hydride (MgH2): An in situ microscopy study by environmental SEM and TEM [J].

Beattie, Shane D. ;

Setthanan, Uncharat ;

McGrady, G. Sean .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2011, 36 (10) :6014-6021

[8] Ti-doped alkali metal aluminium hydrides as potential novel reversible hydrogen storage materials [J].

Bogdanovic, B ;

Schwickardi, M .

JOURNAL OF ALLOYS AND COMPOUNDS, 1997, 253 (1-2) :1-9

[9] The decomposition of LiAlD4 studied by in-situ X-ray and neutron diffraction [J].

Brinks, HW ;

Hauback, BC ;

Norby, P ;

Fjellvåg, H .

JOURNAL OF ALLOYS AND COMPOUNDS, 2003, 351 (1-2) :222-227

[10] Water droplet accumulation and motion in PEM (Proton Exchange Membrane) fuel cell mini-channels [J].

Carton, J. G. ;

Lawlor, V. ;

Olabi, A. G. ;

Hochenauer, C. ;

Zauner, G. .

ENERGY, 2012, 39 (01) :63-73

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