Kinetics Tuning and Electrochemical Performance of Mg-Based Hydrogen Storage Alloys

Progress of graphene and loaded transition metals on Mg-based hydrogen storage alloys

In order to study the improvement mechanism of transition metal elements on Mg-based hydrogen storage alloys, especially for the structures and properties of hydrogen storage alloy Mg2Ni, Ti and Zn substituted alloys Mg2-mMmNi,Mg2Ni1-nMn (M=Ti and Zn, m, n=0.1667), and their hydrides Mg2NiH4,Mg2-mMmNiH4,Mg2Ni1-nMnH4(M=Ti and Zn, m , n=0.125) have been investigated by first-principles. Through analyzing the results of the crystal structure, electron density distribution and density of states, the changes of structures and properties resulting from the adding of transition metal elements Ti and V of intermetallic Mg2Ni and its hydride Mg2NiH4 were investigated. The results showed that the addition of transition metal elements can reduce the stability of the Mg2Ni system to varying degrees and improve the dehydrogenation dynamics performance. Therefore, it may be considered that the substitution by transition metal elements in Mg-based hydrogen storage alloys is an effective technique to improve the thermodynamic behavior of hydrogenation/dehydrogenation in Mg-based hydrogen storage alloys (HSAs).

Microstructure and hydrogen storage properties of Mg-Ni-Ce alloys with a long-period stacking ordered phase

Amorphous alloys for hydrogen storage

Construction of Mg/Zr superlattice structure to achieve efficient hydrogen storage via atomic-scale interaction in Mg-Zr modulation films

Magnesium-based hydrogen storage compounds: A review

Characterization on the kinetics and thermodynamics of Mg-based hydrogen storage alloy by the multiple alloying of Ce, Ni and Y elements

Synthesis and electrochemical properties of binary MgTi and ternary MgTiX (X = Ni, Si) hydrogen storage alloys

The cycle life prediction of Mg-based hydrogen storage alloys by artificial neural network

Design and synthesis of a magnesium alloy for room temperature hydrogen storage

Hydrogen storage alloy has a potential material to become one of the most promising candidates as an effective storage system and it has higher safety and storage density than other storage systems. The Mg-based hydrogen storage alloy has the advantage of high hydrogen storage density (7.6 wt% in MgH2), light weight and low cost, while it needs to improve its slow reaction kinetics and high desorption temperature for practical applications. In this research, we prepared the Mg/Fe multi-layer films with the pulsed laser deposition (PLD) method and studied their hydrogen absorption and desorption properties for the effects of the order of layer and the Ti layer on the surface. The differential scanning calorimetry (DSC) and X-Ray diffraction (XRD) were carried out to characterize the hydrogen desorption temperature and the hydride. As a result, it found that Polyimide/Fe/Mg/Ti multi-layer showed to make the magnesium hydride after hydrogenation and to leave it at 245°C and that is 173°C lower than that of pure magnesium hydride and Polyimide/Mg/Fe/Ti, Polyimide/Fe/Mg and SUS304/Fe/Mg/Ti showed no hydrogen desorption after the hydrogenation.

Dual-tuning of de/hydrogenation kinetic properties of Mg-based hydrogen storage alloy by building a Ni-/Co-multi-platform collaborative system

The magnesium-based hydrogen storage alloy has a very good prospect to be applied in the market of lightweight automobile due to its merits of light weight, excellent discharge performance, long cycle life, and large hydrogen storage capacity. However, existing studies on magnesium-based hydrogen storage alloy have a series of shortcomings such as the insufficient works in terms of model reasonability analysis, heat transfer behavior analysis, heat control scheme design, and comparative experiment analysis, etc. In view of these problems, this paper studied the thermal effect and heat control strategy of the Mg-based Hydrogen Storage Alloy (MHSA) system for lightweight automobile. At first, this paper constructed numerical models for the fluid-solid coupled heat exchange region and the heat conduction region in the system; then, based on the law of energy conservation, a heat transfer behavior model of the MHSA system was established and used to analyze the thermal effect of the system. After that, according to the driving process of hydrogen fuel cell electric vehicle, the working process of the MHSA system was further analyzed to study the heat control process. Next, this paper proposed a new idea for the heat control of the MHSA system, gave a few tips for the simulations, and presented the flow of the heat control scheme of the system. At last, the experimental results were given and analyzed.

Preparation of Mg-based hydrogen storage materials from metal nanoparticles

Two-dimensional material MXene and its derivatives enhance the hydrogen storage properties of MgH2: A review and summary