Electrochemical and Structural Characterization of Ti-V-Ni Hydrogen Storage Alloys with BCC Structure

2000 ◽  
Vol 147 (7) ◽  
pp. 2503 ◽  
Author(s):  
Chiaki Iwakura ◽  
Weon-Kyung Choi ◽  
Rie Miyauchi ◽  
Hiroshi Inoue
Keyword(s):  
Hydrogen Storage ◽  
Structural Characterization ◽  
Hydrogen Storage Alloys ◽  
Bcc Structure

Structural Characterization of Mg2CoH5-based Nanocomposites for Hydrogen Storage

2014 ◽  
Vol 70 (a1) ◽  
pp. C741-C741
Author(s):  
Daniel Leiva ◽  
Santiago Figueroa ◽  
Bárbara Terra ◽  
Guilherme Zepon ◽  
Diego Lamas ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Structural Characterization ◽  
High Capacity ◽  
Nanocrystalline Structure ◽  
Hydrogen Desorption ◽  
Planetary Mill ◽  
Processing Route ◽  
Desorption Kinetics ◽  
Complex Hydrides

Hydrogen is considered the ideal energy carrier, mainly due to its heating power, the highest among all chemical fuels, and to possibility of using it in fuel cells, therefore with efficiency and producing only water as by-product. However, the development of safe and effective hydrogen storage solutions remains as a challenge of applied research. MgH2, Mg2FeH6 and Mg2CoH5complex hydrides are promising materials for hydrogen storage, avoiding the inconvenient of gaseous or liquid storage alternatives. The main attractives of these phases are their volumetric and gravimetric hydrogen capacities, their reversibility during absorption/desorption cycles and the relatively low cost. Recently, we have achieved an important control of the synthesis of Mg-based complex hydrides with nanocrystalline structure, using reactive milling (RM) under hydrogen atmosphere as processing route [1, 2]. In this study, we present new results concerning the synthesis, hydrogen storage properties and structural characterization of MgH2–Mg2CoH5nanocomposites prepared by RM. The nanocomposites were produced by milling different Mg-Co starting compositions (2:1, 3:1, 5:1, 7:1, 1:0) for 12 h in a planetary mill under 3 MPa of H2. All samples were fully hydrogenated during milling, generating different MgH2–Mg2CoH5hydride mixtures. Mg presents the tendency of agglomerate during milling, so the sample that presents more MgH2shows larger agglomerates. This behavior causes a slight increase in the temperature of hydrogen desorption and the presence of two peaks, showed by DSC analysis for those samples which presents MgH2and Mg2CoH5. Using in-situ XRD and XANES during hydrogen desorption revealed that Mg and Co tend to remain coupled forming intermetallics after the complex hydride decomposition, differently from that was observed for Mg2FeH6. This effect is correlated to the high-reversibility exhibited by the Mg2CoH5phase. Furthermore, the nanocomposites of MgH2+Mg2CoH5showed better H-absorption/desorption kinetics than the Mg2CoH5or MgH2alone, as shown by volumetric measurements. The combination of MgH2and Mg2CoH5is therefore a promising strategy to produce hydrogen storage materials, matching the good reversibility and high capacity of magnesium hydride with the lower thermal stability.

scholarly journals Structural Characterization of the Silicon Clathrate Compound Kx(H2)ySi46 for Hydrogen Storage Materials

Materia Japan ◽  
2009 ◽  
Vol 48 (12) ◽  
pp. 592-592
Author(s):  
Norihiko L. Okamoto ◽  
Quentin M. Ramasse ◽  
David G. Morgan ◽  
Doinita Neiner ◽  
Susan M. Kauzlarich ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Structural Characterization ◽  
Hydrogen Storage Materials ◽  
Storage Materials ◽  
Clathrate Compound ◽  
Silicon Clathrate

Electrochemical characterization of absorbed hydrogen in stoichiometric and nonstoichiometric hydrogen storage alloys

1997 ◽  
Vol 42 (7) ◽  
pp. 1087-1090 ◽  
Author(s):  
Hiroshi Inoue ◽  
Masayoshi Miyamoto ◽  
Masao Matsuoka ◽  
Yukio Fukumoto ◽  
Chiaki Iwakura
Keyword(s):  
Hydrogen Storage ◽  
Electrochemical Characterization ◽  
Hydrogen Storage Alloys

X-ray characterization of short-pulse laser illuminated hydrogen storage alloys having very high performance

2015 ◽  
Author(s):  
Hiroyuki Daido ◽  
Hiroshi Abe ◽  
Takahisa Shobu ◽  
Takuya Shimomura ◽  
Shinnosuke Tokuhira ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Pulse Laser ◽  
High Performance ◽  
Short Pulse ◽  
Hydrogen Storage Alloys ◽  
X Ray ◽  
Short Pulse Laser ◽  
Very High

Electrochemical characterization of hydrogen storage alloys modified with metal oxides

1993 ◽  
Vol 192 (1-2) ◽  
pp. 152-154 ◽  
Author(s):  
Chiaki Iwakura ◽  
Yukio Fukumoto ◽  
Masao Matsuoka ◽  
Tatsuoki Kohno ◽  
Katsuhide Shinmou
Keyword(s):  
Hydrogen Storage ◽  
Metal Oxides ◽  
Electrochemical Characterization ◽  
Hydrogen Storage Alloys

The Characterization of an Alkaline Fuel Cell That Uses Hydrogen Storage Alloys

2002 ◽  
Vol 149 (5) ◽  
pp. A603 ◽  
Author(s):  
Sang-Min Lee ◽  
Jin-Ho Kim ◽  
Han-Ho Lee ◽  
Paul S. Lee ◽  
Jai-Young Lee
Keyword(s):  
Fuel Cell ◽  
Hydrogen Storage ◽  
Alkaline Fuel Cell ◽  
Hydrogen Storage Alloys
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