Preparation of a Mg-Based alloy with a high hydrogen-storage capacity by adding a polymer CMC via milling in a hydrogen atmosphere

2019 ◽  
Vol 44 (7) ◽  
pp. 3779-3789 ◽  
Author(s):  
Myoung Youp Song ◽  
Eunho Choi ◽  
Young Jun Kwak
Keyword(s):  
Hydrogen Storage ◽  
Storage Capacity ◽  
Hydrogen Atmosphere ◽  
Hydrogen Storage Capacity ◽  
High Hydrogen

Mechanochemical synthesis of a Mg-Li-Al-H complex hydride

2009 ◽  
Vol 24 (9) ◽  
pp. 2880-2885 ◽  
Author(s):  
Jing Zhang ◽  
Wei Yan ◽  
Chenguang Bai ◽  
Fusheng Pan
Keyword(s):  
Solid Solution ◽  
Hydrogen Storage ◽  
Storage Capacity ◽  
Raw Materials ◽  
Initial Step ◽  
Hydrogen Atmosphere ◽  
Al Alloy ◽  
Hydrogen Storage Capacity ◽  
Scanning Calorimetry ◽  
Complex Hydride

Mg-Li-Al alloy was prepared by ingot casting and then underwent subsequent reactive ball milling. A Mg-Li-Al-H complex hydride was obtained under a 0.4 MPa hydrogen atmosphere at room temperature, and as high as 10.7 wt% hydrogen storage capacity was achieved, with the peak desorption temperature of the initial step at approximately 65 °C. The evolution of the reaction during milling, as well as the effect of Li/Al ratio in the raw materials on the desorption properties of the hydrides formed, were studied by x-ray diffraction and simultaneous thermogravimetry and differential scanning calorimetry techniques. The results showed that mechanical milling increases the solubility of Li in Mg, leading to the transformation of bcc β(Li) solid solution to hcp α(Mg) solid solution, the latter continues to incorporate Li and Al, which stimulates the formation of Mg-Li-Al-H hydride. A lower Li/Al ratio resulted in faster hydrogen desorption rate and a greater amount of hydrogen released at a low temperature range, but sacrificing total hydrogen storage capacity.

scholarly journals Recent advances on the thermal destabilization of Mg-based hydrogen storage materials

RSC Advances ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 408-428 ◽  
Author(s):  
Jianfeng Zhang ◽  
Zhinian Li ◽  
Yuanfang Wu ◽  
Xiumei Guo ◽  
Jianhua Ye ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Storage Capacity ◽  
Magnesium Hydride ◽  
Hydrogen Storage Materials ◽  
Hydrogen Storage Capacity ◽  
High Hydrogen ◽  
Storage Materials ◽  
Recent Advances

Magnesium hydride and its compounds have a high hydrogen storage capacity and are inexpensive, and thus have been considered as one of the most promising hydrogen storage materials for on-board applications.

Regeneration of Ammonia-Borane Complex for Hydrogen Storage

2005 ◽  
Vol 884 ◽  
Author(s):  
Nahid Mohajeri ◽  
Ali T-Raissi
Keyword(s):  
Hydrogen Storage ◽  
Energy Efficient ◽  
Storage Capacity ◽  
Storage System ◽  
Cost Effective ◽  
Hydrogen Storage Capacity ◽  
High Hydrogen ◽  
The Past ◽  
Hydrogen Storage System ◽  
Energy Center

AbstractAt the Florida Solar Energy Center (FSEC), a research program is underway for developing a high-density hydrogen storage system based on amine-borane (AB) complexes. Due to their high hydrogen capacity, these hydrides have been employed, in the past, as disposable hydrogen sources for fuel cell applications. However, to meet the requirements for hydrogen storage onboard vehicles, it is essential that cost effective and energy efficient methods for the regeneration (i.e. hydrogenation) of the spent (dehydrogenated) AB complexes can be found that utilize only hydrogen and/or electricity (i.e. the only plausible hydrogen economy energy carriers).We are studying two ammoniaborane (NH3BH3)-based systems with high hydrogen storage capacity. The first system employs a borazine-cyclotriborazane cycle. Borazine is a product of NH3BH3 thermolysis. Cyclotriborazane is the inorganic analog of cyclohexane. The second system employs polymeric AB complexes such as poly-(aminoborane) and polyborazylene. Poly-(aminoborane), an inorganic analog of polyethylene, is also a product of amoniaborane thermolysis whilepolyborazylene is the product of borazine thermolysis.For the two systems above, we are developing regeneration (i.e. reduction of borazine, poly-(aminoborane) and polyborazylene) schemes based on: 1) catalytic hydrogenation and 2) indirect (multi-step) synthesis techniques.

scholarly journals Improvement in the Hydrogenation and Dehydrogenation Features of Mg by Milling in Hydrogen with Vanadium Chloride

2021 ◽  
Vol 59 (10) ◽  
pp. 721-729
Author(s):  
Myoung Youp Song ◽  
Seong Ho Lee ◽  
Young Jun Kwak
Keyword(s):  
Solid Solution ◽  
Hydrogen Storage ◽  
Storage Capacity ◽  
Hydrogen Atmosphere ◽  
Starting Material ◽  
Hydrogen Storage Capacity ◽  
Reactive Milling ◽  
Nucleation Sites ◽  
Milling In Hydrogen ◽  
Vanadium Chloride

VCl3 (vanadium (III) chloride) was selected as an additive to Mg to increase the hydrogenation and dehydrogenation rates and the hydrogen storage capacity of Mg. Instead of MgH2, Mg was used as a starting material since Mg is cheaper than MgH2. Samples with a composition of 95 wt% Mg + 5 wt% VCl3 (named Mg-5VCl3) were prepared by milling in hydrogen atmosphere (reactive milling). In the first cycle (n=1), Mg-5VCl3 absorbed 5.38 wt% H for 5 min and 5.95 wt% H for 60 min at 573 K in 12 bar hydrogen. The activation of Mg-5VCl3 was completed after three hydrogenation-dehydrogenation cycles. During milling in hydrogen, β-MgH2 and γ-MgH2 were produced. The formed β-MgH2 and γ-MgH2 are considered to have made the effects of reactive milling stronger as β-MgH2 and γ-MgH2 themselves were being pulverized. The introduced defects and the interfaces between the Mg and the phases formed during the reactive milling and during hydrogenation-dehydrogenation cycling are believed to serve as heterogeneous active nucleation sites for MgH2 and Mg-H solid solution. The phases generated during hydrogenation-dehydrognation cycling are also believed to prevent the particles from coalescing during hydrogenation-dehydrognation cycling.

scholarly journals Improvement in the Hydrogenation and Dehydrogenation Features of Mg by Milling in Hydrogen with Vanadium Chloride

2021 ◽  
Vol 59 (10) ◽  
pp. 709-717
Author(s):  
Myoung Youp Song ◽  
Seong Ho Lee ◽  
Young Jun Kwak
Keyword(s):  
Solid Solution ◽  
Hydrogen Storage ◽  
Storage Capacity ◽  
Hydrogen Atmosphere ◽  
Starting Material ◽  
Hydrogen Storage Capacity ◽  
Reactive Milling ◽  
Nucleation Sites ◽  
Milling In Hydrogen ◽  
Vanadium Chloride

VCl3 (vanadium (III) chloride) was selected as an additive to Mg to increase the hydrogenation and dehydrogenation rates and the hydrogen storage capacity of Mg. Instead of MgH2, Mg was used as a starting material since Mg is cheaper than MgH2. Samples with a composition of 95 wt% Mg + 5 wt% VCl3 (named Mg-5VCl3) were prepared by milling in hydrogen atmosphere (reactive milling). In the first cycle (n=1), Mg-5VCl3 absorbed 5.38 wt% H for 5 min and 5.95 wt% H for 60 min at 573 K in 12 bar hydrogen. The activation of Mg-5VCl3 was completed after three hydrogenation-dehydrogenation cycles. During milling in hydrogen, β-MgH2 and γ-MgH2 were produced. The formed β-MgH2 and γ-MgH2 are considered to have made the effects of reactive milling stronger as β-MgH2 and γ-MgH2 themselves were being pulverized. The introduced defects and the interfaces between the Mg and the phases formed during the reactive milling and during hydrogenation-dehydrogenation cycling are believed to serve as heterogeneous active nucleation sites for MgH2 and Mg-H solid solution. The phases generated during hydrogenation-dehydrognation cycling are also believed to prevent the particles from coalescing during hydrogenation-dehydrognation cycling.

High hydrogen storage capacity in calcium-decorated silicene nanostructures

2015 ◽  
Vol 252 (9) ◽  
pp. 2072-2078 ◽  
Author(s):  
Feng Li ◽  
Changwen Zhang ◽  
Wei-Xiao Ji ◽  
Mingwen Zhao
Keyword(s):  
Hydrogen Storage ◽  
Storage Capacity ◽  
Hydrogen Storage Capacity ◽  
High Hydrogen

NbF5 and CrF3 Catalysts Effects on Synthesis and Hydrogen Storage Performance of Mg-Ni-NiO Composites

2013 ◽  
Vol 681 ◽  
pp. 31-37
Author(s):  
Qi Wan ◽  
Ping Li ◽  
Teng Wang ◽  
Xuan Hui Qu
Keyword(s):  
Hydrogen Storage ◽  
Hydrogen Pressure ◽  
Storage Capacity ◽  
Hydrogen Storage Capacity ◽  
High Hydrogen ◽  
Hydrogen Capacity ◽  
Storage Performance ◽  
Desorption Temperature ◽  
Hydrogen Storage Performance ◽  
Potential Use

Two kinds of novel materials, Mg-1.6mol%Ni-0.4mol%NiO-2mol%MF (MF=NbF5, CrF3), along with Mg-1.6mol%Ni-0.4mol%NiO for comparison, were examined for their potential use in hydrogen storage applications, having been fabricated via cryomilling. The effects of NbF5 and CrF3 on hydrogen storage performance were investigated. A microstructure analysis showed that, aside from the main phase Mg, Ni and NiO phases, NbO, MgF2 and Mg2Ni were present in all samples after ball milling, MgH2 and NbH2 were observed in all samples after absorption. The CrF3-containing composite exhibited a good PCT results and a low onset desorption temperature under 0.1 MPa. The NbF5-containing composite exhibited a low absorption temperature of 323 K, a high hydrogen storage capacity of 4.03wt% at 373 K under the hydrogen pressure of 4.0 MPa, and it absorbed 90% of its full hydrogen capacity in 2700 sec and 100% in 5100 sec, it desorbed more than 1.8wt% in 3600 sec under vacuum environment. The CrF3-doped sample exhibited a low onset desorption temperature of 543 K under 0.1 MPa, and a low hysteresis coefficient of 0.25 at 573 K, and lower than 0.2 when temperature was 623 K. NbO and NbH2 played an important role in improving the absorption and desorption performance.

scholarly journals Mixed-linker approach in designing porous zirconium-based metal–organic frameworks with high hydrogen storage capacity

2016 ◽  
Vol 52 (50) ◽  
pp. 7826-7829 ◽  
Author(s):  
Ayesha Naeem ◽  
Valeska P. Ting ◽  
Ulrich Hintermair ◽  
Mi Tian ◽  
Richard Telford ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
High Selectivity ◽  
Storage Capacity ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Hydrogen Uptake ◽  
Hydrogen Storage Capacity ◽  
High Hydrogen ◽  
Metal Organic ◽  
Adsorption Of Co

New zirconium based metal–organic framework (UBMOF-31) synthesised using mixed-linker strategy showing permanent porosity, excellent hydrogen uptake, and high selectivity for adsorption of CO2 over N2.

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