Elastic stress in composite FeTi hydrogen storage materials

1998 ◽  
Vol 13 (6) ◽  
pp. 1538-1547 ◽  
Author(s):  
P. Tessier ◽  
R. Schulz ◽  
J. O. Ström-Olsen
Keyword(s):  
Hydrogen Storage ◽  
Elastic Stress ◽  
Plateau Pressure ◽  
Miscibility Gap ◽  
Second Phase ◽  
Storage Site ◽  
Intergranular Phase ◽  
Hydrogen Storage Properties ◽  
Absorbing Material ◽  
Storage Properties

A simple model of the elastic stress in a composite hydrogen absorbing material is developed to account for the hydrogen storage properties of nanocrystalline FeTi with a network of intergranular phase having a wide storage site energy distribution. The model accounts for the equilibrium properties of nanocrystalline FeTi hydrogen absorbers made by ball-milling such as the narrowing of the miscibility gap and changes in plateau pressure. A second model is proposed for disconnected inclusions of the second phase. The effect of chemical disorder is also briefly examined.

Experimental Study on the Hydrogen Storage Properties of LaNi5 Alloy in Repeated Hydriding/Dehydriding Cycles

2013 ◽  
Vol 815 ◽  
pp. 25-30 ◽  
Author(s):  
Xin Xin Cao ◽  
Fu Sheng Yang ◽  
Zhen Wu ◽  
Yu Qi Wang ◽  
Zao Xiao Zhang
Keyword(s):  
Hydrogen Storage ◽  
Reaction Rate ◽  
Plateau Pressure ◽  
Reaction Rate Constant ◽  
Oxidation Products ◽  
Equilibrium Pressure ◽  
Hydrogen Storage Properties ◽  
Jma Model ◽  
Controlling Mechanism ◽  
Storage Properties

LaNi5 alloy is one of the promising materials for hydrogen storage. It has good activation property, fast reaction rate and moderate plateau pressure. However, some of its hydrogen storage properties will change after repeated hydriding/dehydriding cycles, which limits its practical application. Therefore, this paper investigated the cycling properties of LaNi5 alloy by volumetric method. The results showed that the reaction rate increased with cycling. The hydriding/dehydriding hydrogen content decreased with cycling. For hydriding reaction, the equilibrium pressure increased with cycling, while it decreased for dehydriding at 40°C and 60°C. After 100 cycles, the LaNi5 alloy has been severely pulverized and oxygenated. The oxidation products include LaNiO2, La2NiO4, La2NiO4.18 and LaNiO3. The JMA model was found to fit the kinetic data well, suggesting a nucleation and growth controlling mechanism. The intrinsic reaction rate constant ka increases from 21.87 s-1to 24.81 s-1, while the activation energy decreases from the initial value of 19459 to 19373 J/mol after 100 cycles.

Achieving superior hydrogen storage properties of MgH2 by the effect of TiFe and carbon nanotubes

2021 ◽  
Vol 422 ◽  
pp. 130101
Author(s):  
Xiong Lu ◽  
Liuting Zhang ◽  
Haijie Yu ◽  
Zhiyu Lu ◽  
Jiahuan He ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Storage ◽  
Hydrogen Storage Properties ◽  
Storage Properties

Review on the effect of metal oxides as surface coatings on hydrogen storage properties of porous and non-porous materials

2021 ◽  
Author(s):  
Thabang Ronny Somo ◽  
Tumiso Eminence Mabokela ◽  
Daniel Malesela Teffu ◽  
Tshepo Kgokane Sekgobela ◽  
Mpitloane Joseph Hato ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Metal Oxides ◽  
Porous Materials ◽  
Surface Coatings ◽  
Hydrogen Storage Properties ◽  
Storage Properties

Improved Hydrogen Storage Properties of NaBH4 Destabilized by CaH2 and Ca(BH4)2

2011 ◽  
Vol 115 (18) ◽  
pp. 9283-9290 ◽  
Author(s):  
Jianfeng Mao ◽  
Zaiping Guo ◽  
Xuebin Yu ◽  
Huakun Liu
Keyword(s):  
Hydrogen Storage ◽  
Hydrogen Storage Properties ◽  
Storage Properties

Comparison of hydrogen storage properties of Mg–Ni from different preparation methods

2011 ◽  
Vol 127 (1-2) ◽  
pp. 405-408 ◽  
Author(s):  
A. Ranjbar ◽  
S. Aminorroaya ◽  
Z.P. Guo ◽  
Y. Cho ◽  
H.K. Liu ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Preparation Methods ◽  
Hydrogen Storage Properties ◽  
Storage Properties

scholarly journals Understanding of Hydrogen Storage Properties of Metal Hydrides Based on Structural Analysis

Materia Japan ◽  
2013 ◽  
Vol 52 (7) ◽  
pp. 328-332
Author(s):  
Yumiko Nakamura ◽  
Kouji Sakaki ◽  
Kohta Asano ◽  
Hyunjeong Kim ◽  
Itoko Matsumoto ◽  
...  
Keyword(s):  
Structural Analysis ◽  
Hydrogen Storage ◽  
Metal Hydrides ◽  
Hydrogen Storage Properties ◽  
Storage Properties
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