The Characters and Mechanism Research of Hydrogen Absorption/Desorption Kinetics for Alloy Hydrogen Storage Materials

2020 ◽  
Vol 10 (12) ◽  
pp. 1002-1026
Author(s):  
传铮 杨
Keyword(s):  
Hydrogen Storage ◽  
Hydrogen Absorption ◽  
Desorption Kinetics ◽  
Hydrogen Storage Materials ◽  
Storage Materials ◽  
Mechanism Research

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.

Interrelation between Hydrogen Desorption Kinetics and Structure of (Mg2Ni)Hx and Hydrogenated Eutectic(Mg/Mg2Ni)Hy

2009 ◽  
Vol 289-292 ◽  
pp. 167-174
Author(s):  
Jiri Cermak ◽  
Lubomir Kral
Keyword(s):  
Diffusion Coefficient ◽  
Binary System ◽  
Low Temperature ◽  
Hydrogen Storage ◽  
Eutectic Mixture ◽  
Hydrogen Desorption ◽  
Desorption Kinetics ◽  
Hydrogen Storage Materials ◽  
Storage Materials ◽  
Intermetallic Diffusion

Mg-rich alloys of the binary system Mg-Ni are prospective hydrogen-storage materials. In the present study, desorption characteristics of hydrided Mg2Ni intermetalic and hydrided Mg/Mg2Ni eutectic mixture were investigated. Structure of experimental materials during the hydrogenation was observed by SEM. Three modifications of (Mg2Ni)Hx (x ~ 4) were prepared differing in the ratio of two low-temperature phases f = LT2/LT1: with (i) f >1, (ii) f ~ 1 and with (iii) f <1. Evolution of the ratio f during hydrogen desorption was checked by XRD. It was found that the micro-twinned phase LT2 is not desirable in hydrogen-storage materials containing Mg2Ni intermetallic. Diffusion coefficient of hydrogen in LT2 is about 20 times lower than in LT1.

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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