A study on the effects of K2ZrF6 as an additive on the microstructure and hydrogen storage properties of MgH2

RSC Advances ◽  
2015 ◽  
Vol 5 (12) ◽  
pp. 9255-9260 ◽  
Author(s):  
F. A. Halim Yap ◽  
N. S. Mustafa ◽  
M. Ismail
Keyword(s):  
Hydrogen Storage ◽  
Hydrogen Storage Properties ◽  
Dehydrogenation Kinetics ◽  
Storage Properties

It was found that the MgH2 + 10 wt% K2ZrF6 sample started to decompose at around 250 °C, which was 100 °C and lower than in as-milled MgH2. The re/dehydrogenation kinetics had also improved significantly compared to the undoped MgH2.

scholarly journals Effect of Different Amounts of TiF3 on the Reversible Hydrogen Storage Properties of 2LiBH4–Li3AlH6 Composite

2021 ◽  
Vol 9 ◽  
Author(s):  
Yun Li ◽  
Yuxian Zhang ◽  
Lixin Chen
Keyword(s):  
Hydrogen Storage ◽  
Back Pressure ◽  
Scanning Calorimetry ◽  
Hydrogen Storage Properties ◽  
Liquid Phases ◽  
Complex Hydrides ◽  
Dehydrogenation Kinetics ◽  
Temperature Programmed ◽  
Time Required ◽  
Storage Properties

Hydrogen is a potential green alternative to conventional energy carriers such as oil and coal. Compared with the storage of hydrogen in gaseous or liquid phases, the chemical storage of hydrogen in solid complex hydrides is safer and more effective. In this study, the complex hydride composite 2LiBH4–Li3AlH6 with different amounts of TiF3 was prepared by simple ball-milling and its hydrogen storage properties were investigated. Temperature programmed desorption and differential scanning calorimetry were used to characterize the de/rehydrogenation performance, and X-ray diffraction and scanning electron microscopy (SEM) were used to explore the phase structure and surface topography of the materials. The dehydrogenation temperature decreased by 48°C in 2LiBH4–Li3AlH6 with 15 wt% TiF3 composites compared to the composite without additives while the reaction kinetics was accelerated by 20%. In addition, the influence of hydrogen back pressure on the 2LiBH4–Li3AlH6 with 5 wt% TiF3 composite was also investigated. The results show that hydrogen back pressure between 2.5 and 3.5 bar can improve the reversible performance of the composite to some extent. With a back pressure of 3.5 bar, the second dehydrogenation capacity increased to 4.6 wt% from the 3.3 wt% in the 2LiBH4–Li3AlH6 composite without hydrogen back pressure. However, the dehydrogenation kinetics was hindered. About 150 h, which is 100 times the time required without back pressure, was needed to release 8.7 wt% of hydrogen at 3.5 bar hydrogen back pressure. The SEM results show that aluminum was aggregated after the second cycle of dehydrogenation at the hydrogen back pressure of 3 bar, resulting in the partial reversibility of the 5 wt% TiF3-added 2LiBH4–Li3AlH6 composite.

scholarly journals Enhanced Hydrogen Storage Properties of Li-RHC System with In-House Synthesized AlTi3 Nanoparticles

Energies ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7853
Author(s):  
Thi-Thu Le ◽  
Claudio Pistidda ◽  
Julián Puszkiel ◽  
María Victoria Castro Riglos ◽  
David Michael Dreistadt ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Hydrogenation Reaction ◽  
Kinetic Behavior ◽  
High Hydrogen ◽  
Hydrogen Storage Properties ◽  
Storage Performance ◽  
Dehydrogenation Kinetics ◽  
Hydrogen Storage Performance ◽  
Kinetics Of ◽  
Storage Properties

In recent years, the use of selected additives for improving the kinetic behavior of the system 2LiH + MgB2 (Li-RHC) has been investigated. As a result, it has been reported that some additives (e.g., 3TiCl3·AlCl3), by reacting with the Li-RHC components, form nanostructured phases (e.g., AlTi3) possessing peculiar microstructural properties capable of enhancing the system’s kinetic behavior. The effect of in-house-produced AlTi3 nanoparticles on the hydrogenation/dehydrogenation kinetics of the 2LiH + MgB2 (Li-RHC) system is explored in this work, with the aim of reaching high hydrogen storage performance. Experimental results show that the AlTi3 nanoparticles significantly improve the reaction rate of the Li-RHC system, mainly for the dehydrogenation process. The observed improvement is most likely due to the similar structural properties between AlTi3 and MgB2 phases which provide an energetically favored path for the nucleation of MgB2. In comparison with the pristine material, the Li-RHC doped with AlTi3 nanoparticles has about a nine times faster dehydrogenation rate. The results obtained from the kinetic modeling indicate a change in the Li-RHC hydrogenation reaction mechanism in the presence of AlTi3 nanoparticles.

scholarly journals Fe3O4 nanoclusters highly dispersed on a porous graphene support as an additive for improving the hydrogen storage properties of LiBH4

RSC Advances ◽  
2018 ◽  
Vol 8 (35) ◽  
pp. 19353-19361 ◽  
Author(s):  
Guang Xu ◽  
Wei Zhang ◽  
Ying Zhang ◽  
Xiaoxia Zhao ◽  
Ping Wen ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Hydrogen Storage Properties ◽  
Porous Graphene ◽  
Highly Dispersed ◽  
Dehydrogenation Kinetics ◽  
Storage Properties

Fe3O4 nanoclusters highly dispersed on a porous graphene support were fabricated and significantly improved the dehydrogenation kinetics and rehydrogenation reversibility of LiBH4.

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
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