Advanced study of hydrogen storage by substitutional doping of Mn and Ti in Mg<sub>2</sub>Ni phase

Elkedim, O.; Huang, Liwu; Bassir, David

doi:10.1051/smdo/2014004

Cited by 2 publications

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“…Mg-based alloys have received increasing attentions for hydrogen storage applications due to their high storage capacity, good reversibility, low specific weight and rich natural resources [1][2][3][4][5][6][7][8][9]. Among the Mg-based alloys, the intermetallic Mg 2 Ni is of greatest interest for hydrogen storage because of its relatively high hydrogen capacity (*3.6 wt%) and higher stability in air as compared to pure magnesium [10].…”

Section: Introductionmentioning

confidence: 99%

Phase Stability in Mechanically Alloyed Mg–Ni System Studied by Experiments and Thermodynamic Calculations

Karimzadeh

Sabooni

Jafari

2015

Acta Metall. Sin. (Engl. Lett.)

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In this study, microstructural evolution of Mg-Ni alloy during mechanical alloying (MA) was investigated. Also, a thermodynamic approach was utilized to predict the most stable phases formed in Mg-Ni alloy after MA. The phase composition and microstructural properties of Mg-Ni alloy were assessed by X-ray diffractometry, high-resolution field emission scanning electron microscopy and high-resolution transmission electron microscopy. The results showed that ball milling of magnesium and nickel powder mixture for 70 h yields nanostructural Mg 2 Ni compound with an average grain size of *20 nm. Thermodynamic calculations revealed that in the composition ranges of 0.0 \ X Mg \ 0.03 (at.%) and 0.97 \ X Mg \ 1, there is no driving force for amorphous phase formation. In the composition range of 0.07 \ X Mg \ 0.93, the change of Gibbs free energy for amorphous phase formation was more negative than solid solution. While for X Mg = 0.66 (nominal composition of Mg 2 Ni intermetallic phase), the change of Gibbs free energy for intermetallic phase was found to be more negative than both amorphous and solid solution phases indicating that Mg 2 Ni intermetallic compound is the most stable phase, in agreement with the experimental observations.

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Section: Introductionmentioning

confidence: 99%

Phase Stability in Mechanically Alloyed Mg–Ni System Studied by Experiments and Thermodynamic Calculations

Karimzadeh

Sabooni

Jafari

2015

Acta Metall. Sin. (Engl. Lett.)

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Intermetallic Compounds Synthesized by Mechanical Alloying for Solid-State Hydrogen Storage: A Review

2021

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Hydrogen energy is a very attractive option in dealing with the existing energy crisis. For the development of a hydrogen energy economy, hydrogen storage technology must be improved to over the storage limitations. Compared with traditional hydrogen storage technology, the prospect of hydrogen storage materials is broader. Among all types of hydrogen storage materials, solid hydrogen storage materials are most promising and have the most safety security. Solid hydrogen storage materials include high surface area physical adsorption materials and interstitial and non-interstitial hydrides. Among them, interstitial hydrides, also called intermetallic hydrides, are hydrides formed by transition metals or their alloys. The main alloy types are A2B, AB, AB2, AB3, A2B7, AB5, and BCC. A is a hydride that easily forms metal (such as Ti, V, Zr, and Y), while B is a non-hydride forming metal (such as Cr, Mn, and Fe). The development of intermetallic compounds as hydrogen storage materials is very attractive because their volumetric capacity is much higher (80–160 kgH2m−3) than the gaseous storage method and the liquid storage method in a cryogenic tank (40 and 71 kgH2m−3). Additionally, for hydrogen absorption and desorption reactions, the environmental requirements are lower than that of physical adsorption materials (ultra-low temperature) and the simplicity of the procedure is higher than that of non-interstitial hydrogen storage materials (multiple steps and a complex catalyst). In addition, there are abundant raw materials and diverse ingredients. For the synthesis and optimization of intermetallic compounds, in addition to traditional melting methods, mechanical alloying is a very important synthesis method, which has a unique synthesis mechanism and advantages. This review focuses on the application of mechanical alloying methods in the field of solid hydrogen storage materials.

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Advanced study of hydrogen storage by substitutional doping of Mn and Ti in Mg₂Ni phase

Cited by 2 publications

References 16 publications

Phase Stability in Mechanically Alloyed Mg–Ni System Studied by Experiments and Thermodynamic Calculations

Phase Stability in Mechanically Alloyed Mg–Ni System Studied by Experiments and Thermodynamic Calculations

Intermetallic Compounds Synthesized by Mechanical Alloying for Solid-State Hydrogen Storage: A Review

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Advanced study of hydrogen storage by substitutional doping of Mn and Ti in Mg2Ni phase

Cited by 2 publications

References 16 publications

Phase Stability in Mechanically Alloyed Mg–Ni System Studied by Experiments and Thermodynamic Calculations

Phase Stability in Mechanically Alloyed Mg–Ni System Studied by Experiments and Thermodynamic Calculations

Intermetallic Compounds Synthesized by Mechanical Alloying for Solid-State Hydrogen Storage: A Review

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Advanced study of hydrogen storage by substitutional doping of Mn and Ti in Mg₂Ni phase