scholarly journals Change of Microstructure and Hydrogen Absorption Properties by Initial Activation in Mg/Cu Super-Laminates as Hydrogen Storage Materials

2008 ◽  
Vol 72 (3) ◽  
pp. 188-194 ◽  
Author(s):  
Koji Tanaka ◽  
Nobuhiko Takeichi ◽  
Hideaki Tanaka ◽  
Nobuhiro Kuriyama ◽  
Tamotsu Thomas Ueda ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Hydrogen Absorption ◽  
Hydrogen Storage Materials ◽  
Absorption Properties ◽  
Storage Materials ◽  
Initial Activation ◽  
Change Of Microstructure

Crystal Chemistry of Hydrogen Storage Materials

2008 ◽  
Vol 1098 ◽  
Author(s):  
Martin Owen Jones ◽  
William I. F. David ◽  
Simon R. Johnson ◽  
Marco Sommariva ◽  
Rebecca L. Lowton ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Alkali Metal ◽  
Hydrogen Storage ◽  
Crystal Chemistry ◽  
Hydrogen Absorption ◽  
Chemical Properties ◽  
Hydrogen Storage Materials ◽  
Storage Materials ◽  
Metal Amides ◽  
And Chemical Properties

AbstractWe review here work on two classes of compounds that have been promoted as potential hydrogen storage materials; alkali metal amides and borohydrides, highlighting how their crystal structure and chemical properties may be used to influence the key hydrogen absorption and desorption parameters in these materials.

Kinetics and Thermodynamics of Nanostructured Mg-Based Hydrogen Storage Materials Synthesized from Metal Nanoparticles

2014 ◽  
Vol 924 ◽  
pp. 189-192 ◽  
Author(s):  
Huai Yu Shao ◽  
Xing Guo Li
Keyword(s):  
Hydrogen Storage ◽  
Metal Nanoparticles ◽  
Hydrogen Absorption ◽  
Size Range ◽  
Hydrogen Plasma ◽  
Absorption Kinetics ◽  
Hydrogen Storage Materials ◽  
Storage Materials ◽  
Enthalpy And Entropy ◽  
Desorption Enthalpy

Mg, Ni, Co, Cu and Fe nanoparticles with a particle size of 30-300 nm were synthesized by hydrogen plasma metal reaction method. Nanostructured Mg-based hydrogen storage materials (Mg-H, Mg-Ni-H, Mg-Co-H, Mg-Cu-H and Mg-Fe-H systems) were synthesized from these metal nanoparticles. In this work, the kinetic and thermodynamic properties of these nanostructured hydrogen storage materials were studied. It was found that nanostructure could significantly enhance the hydrogen absorption kinetics but the thermodynamics (desorption enthalpy and entropy) does not change with downsizing in the size range of 50 to 300 nm.

Relations between Microstructure of Mg/Cu Super-laminates and Kinetics of Hydrogen Absorption/desorption

2006 ◽  
Vol 971 ◽  
Author(s):  
Koji Tanaka ◽  
Nobuhiko Takeichi ◽  
Hideaki Tanaka ◽  
Nobuhiro Kuriyama ◽  
Tamotsu T. Ueda ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Hydrogen Absorption ◽  
High Performance ◽  
Hydrogen Storage Materials ◽  
Laminated Structure ◽  
Dense Lattice ◽  
Nano Structures ◽  
Initial Activation ◽  
Laminated Structures ◽  
Kinetics Of

ABSTRACTSuper-laminates have been attracting attention since co-authors Ueda et al. reported that Mg/Cu super-laminates showed reversible hydrogenation and dehydrogenation at 473K. The Mg/Cu super-laminates were prepared by a repetitive fold and roll method. Initial activation at 573 K led the super-laminates to absorb hydrogen at 473K. TEM observations of micro/nano-structures in the super-laminates were performed in order to clarify the process of hydrogenation and dehydrogenation at 473K, The as-rolled Mg/Cu super-laminates have laminated structures in size of sub-micrometer thickness composed of Mg and Cu layers with dense lattice defects. The super-laminates after initial activation keep laminated structure and have uniformly distributed pores with a sub-micrometer diameter. It is considered that these micro/nano-structures of Mg/Cu super-laminates lead to lower dehydrogenation temperature and better kinetics, which would contribute to achieve high performance hydrogen storage materials.

scholarly journals Using Ball Milling for Modification of the Hydrogenation/Dehydrogenation Process in Magnesium-Based Hydrogen Storage Materials: An Overview

Metals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 768 ◽  
Author(s):  
Jinzhe Lyu ◽  
Andrey Lider ◽  
Viktor Kudiiarov
Keyword(s):  
Hydrogen Storage ◽  
Ball Milling ◽  
Hydrogen Absorption ◽  
Storage Capacity ◽  
Low Cost ◽  
Temperature Limit ◽  
Computer Design ◽  
Hydrogen Storage Materials ◽  
Hydrogen Storage Capacity ◽  
Storage Materials

Magnesium-based hydrogen storage materials are considered to be one of the most promising solid-state hydrogen storage materials due to their large hydrogen storage capacity and low cost. However, slow hydrogen absorption/desorption rate and excessive hydrogen absorption/desorption temperature limit the application of magnesium-based hydrogen storage materials. The present paper reviews recent progress in improving the hydrogen storage properties by element substitution and additives. Ball milling is the promising technology for preparing magnesium-based hydrogen storage materials. The research and development of approaches for modifying magnesium-based hydrogen storage materials prepared by ball milling is systematically expounded. It is concluded that ball milling can significantly improve the kinetic and electrochemical properties of magnesium-based hydrogen storage materials and increase the hydrogen storage capacity. In the future, the research of magnesium-based hydrogen storage materials should be developed in terms of hydrogen storage mechanism, computer design of materials and development of a more optimized catalytic system.

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