Hydrogenation and electrochemical studies of La–Mg–Ni alloys

Balcerzak, Mateusz; Nowak, Marek; Jurczyk, M.

doi:10.1016/j.ijhydene.2016.05.220

Cited by 55 publications

(15 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Negative electrodes were fabricated by compacting the alloy powder onto an expanded nickel substrate through a roll mill without any binder. Half-cell measurements were performed using a CTE MCL2 Mini cell testing Annealing has been used to effectively alter the phase components in the AB [38,39], AB 2 [40][41][42][43], AB 3 [44][45][46][47], A 2 B 7 [48][49][50][51], A 5 B 19 [52], AB 5 [53][54][55], A 8 B 21 [56,57], and body-centered-cubic (bcc) [58] MH alloys. According to first-principle calculations on superlattice MH alloy systems, the preferable phase abundance can be influenced by the starting composition and annealing condition [59,60].…”

Section: Methodsmentioning

confidence: 99%

Comparison among Constituent Phases in Superlattice Metal Hydride Alloys for Battery Applications

Kim

Ouchi²,

Nei³

et al. 2017

Batteries

View full text Add to dashboard Cite

Abstract:The effects of seven constituent phases-CeNi 3 , NdNi 3 , Nd 2 Ni 7 , Pr 2 Ni 7 , Sm 5 Ni 19 , Nd 5 Co 19 , and CaCu 5 -on the gaseous phase and electrochemical characteristics of a superlattice metal hydride alloy made by induction melting with a composition of Sm 14 La 5.7 Mg 4.0 Ni 73 Al 3.3 were studied through a series of annealing experiments. With an increase in annealing temperature, the abundance of non-superlattice CaCu 5 phase first decreases and then increases, which is opposite to the phase abundance evolution of Nd 2 Ni 7 -the phase with the best electrochemical performance. The optimal annealing condition for the composition in this study is 920 • C for 5 h. Extensive correlation studies reveal that the A 2 B 7 phase demonstrates higher gaseous phase hydrogen storage and electrochemical discharge capacities and better battery performance in high-rate dischargeability, charge retention, and cycle life. Moreover, the hexagonal stacking structure is found to be more favorable than the rhombohedral structure.

show abstract

Section: Methodsmentioning

confidence: 99%

Comparison among Constituent Phases in Superlattice Metal Hydride Alloys for Battery Applications

Kim

Ouchi²,

Nei³

et al. 2017

Batteries

View full text Add to dashboard Cite

show abstract

“…Balcerzak investigated the hydrogen storage capacity of La2−xMgxNi7 alloys (x = 0, 0.25, 0.5, 0.75, 1). It was observed that the gaseous hydrogen storage capacity of La-Mg-Ni alloys increases with Mg content to a maximum in La1.5Mg0.5Ni7 alloys [15]. In this paper, an La7.0Mg75.5Ni17.5 alloy was prepared by inductive melting to achieve a uniform phase distribution.…”

Section: Resultsmentioning

confidence: 99%

Phase Transformation and Hydrogen Storage Properties of an La7.0Mg75.5Ni17.5 Hydrogen Storage Alloy

Nan

et al. 2017

Crystals

View full text Add to dashboard Cite

X-ray diffraction showed that an La 7.0 Mg 75.5 Ni 17.5 alloy prepared via inductive melting was composed of an La 2 Mg 17 phase, an LaMg 2 Ni phase, and an Mg 2 Ni phase. After the first hydrogen absorption/desorption process, the phases of the alloy turned into an La-H phase, an Mg phase, and an Mg 2 Ni phase. The enthalpy and entropy derived from the van't Hoff equation for hydriding were −42.30 kJ·mol −1 and −69.76 J·K −1 ·mol −1 , respectively. The hydride formed in the absorption step was less stable than MgH 2 (−74.50 kJ·mol −1 and −132.3 J·K −1 ·mol −1 ) and Mg 2 NiH 4 (−64.50 kJ·mol −1 and −123.1 J·K −1 ·mol −1 ). Differential thermal analysis showed that the initial hydrogen desorption temperature of its hydride was 531 K. Compared to Mg and Mg 2 Ni, La 7.0 Mg 75.5 Ni 17.5 is a promising hydrogen storage material that demonstrates fast adsorption/desorption kinetics as a result of the formation of an La-H compound and the synergetic effect of multiphase.

show abstract

“…In the work of M. Balcerzak et al [114], MA technology was used to manufacture La 2 Ni 7 alloy, and then, Mg element was also incorporated to produce the ternary alloy La 2−x Mg x Ni 7 (x = 0-1). It was found that the electrochemical and thermodynamic properties of this alloy increased with the rise content of Mg, and the alloy with the best performance was La 1.5 Mg 0.5 Ni 7 .…”

Section: Ab 3 and A 2 B 7 Hydrogen Storage Alloymentioning

confidence: 99%

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

2021

View full text Add to dashboard Cite

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.

show abstract

Hydrogenation and electrochemical studies of La–Mg–Ni alloys

Cited by 55 publications

References 15 publications

Comparison among Constituent Phases in Superlattice Metal Hydride Alloys for Battery Applications

Comparison among Constituent Phases in Superlattice Metal Hydride Alloys for Battery Applications

Phase Transformation and Hydrogen Storage Properties of an La7.0Mg75.5Ni17.5 Hydrogen Storage Alloy

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

Contact Info

Product

Resources

About