La–Ni Based Alloy Modification by Ce and Fe for the Next Hydrogen Storage in Low-Temperature Metal Hydrides

Chesalkin, Artem; Martaus, Alexandr; Averina, Julia; Menshikov, Vladimir

doi:10.3103/s1067821219050092

Cited by 5 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These materials have been extensively studied for HS applications or as materials for electrodes in nickel-metal hydride batteries. , They are characterized by the unique kinetics and thermodynamics of HS . The observed hydrogen sorption proceeds at relatively low equilibrium pressures ( p eq < 1 MPa) and temperatures ( T < 373 K), which makes these materials suitable for applications with fuel cells . Moreover, these types of materials can be easily activated and can have a good oxygenation resistance .…”

Section: Introductionmentioning

confidence: 99%

“…24 The observed hydrogen sorption proceeds at relatively low equilibrium pressures (p eq < 1 MPa) and temperatures (T < 373 K), which makes these materials suitable for applications with fuel cells. 25 Moreover, these types of materials can be easily activated and can have a good oxygenation resistance. 26 Nevertheless, their HS properties, such as cyclic stability or plateau flatness in the pressureconcentration temperature (PCT) plot, could be improved by alloying of substitution elements.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of Fe on the Hydrogen Storage Properties of LaCeNi Alloys

Král

Chesalkin²,

Čermák

et al. 2023

Langmuir

View full text Add to dashboard Cite

LaNi 5 intermetallic compounds with a hexagonal CaCu 5 type structure can react reversibly with hydrogen. The element substitutions in LaNi 5 can significantly change the hydrogenation properties, allowing to tune them to a large extent. It could be very advantageous to partially replace Ni or La with other elements to reduce the cost of this alloy as well as the equilibrium pressure of absorption and desorption. The hydrogen storage properties of ball-milled AB 5 alloys containing the elements La, Ce (A-rare elements) and Ni, Fe (B-transition metals) were studied in this paper. Although the substitution of Ni (atomic radius 1.49 Å) with Fe atom (atomic radius 1.56 Å) increased the unit cell volume from 86.4149 to 87.947 5 Å 3 of the LaNi 5 phase, its hydrogen storage capacity was still close to the value 1.4 wt %. The enthalpy (ΔH) of hydride formation for hydrogen absorption and desorption of the experimental alloys was in the range of 29−32.6 kJ/mol. A very favorable effect of Fe on the sorption properties was found in the significant reduction of the equilibrium pressure of absorption and desorption. These studied experimental Fe-containing alloys were able to store hydrogen at 300 K and with pressure under 0.1 MPa. The fastest sorption kinetics of hydrogen was found in alloys with FeNi phase particles located on the surface of the powder. However, if the FeNi phase was segregated at the grain boundaries, it acted as a barrier limiting the growth of the hydride phase. This led to a decrease of the hydride sorption kinetics.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Fe on the Hydrogen Storage Properties of LaCeNi Alloys

Král

Chesalkin²,

Čermák

et al. 2023

Langmuir

View full text Add to dashboard Cite

show abstract

“…In addition, using FCs and MHs in one system gives the possibility to provide the required pure hydrogen to the PEMFCs. LaNi-based alloys allow storing hydrogen at ambient temperatures of 25-40 • C and low pressures of 1.0-1.5 MPa, which makes the application of these alloys quite attractive in mentioned above specific conditions [23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Optimization of NEXA Ballard Low-Temperature PEMFC

Chesalkin¹,

Kacor

Moldrik

2021

Energies

View full text Add to dashboard Cite

Hydrogen is one of the modern energy carriers, but its storage and practical use of the newest hydrogen technologies in real operation conditions still is a task of future investigations. This work describes the experimental hydrogen hybrid energy system (HHS). HHS is part of a laboratory off-grid system that stores electricity gained from photovoltaic panels (PVs). This system includes hydrogen production and storage units and NEXA Ballard low-temperature proton-exchange membrane fuel cell (PEMFC). Fuel cell (FC) loses a significant part of heat during converting chemical energy into electricity. The main purpose of the study was to explore the heat distribution phenomena across the FC NEXA Ballard stack during load with the next heat transfer optimization. The operation of the FC with insufficient cooling can lead to its overheating or even cell destruction. The cause of this undesirable state is studied with the help of infrared thermography and computational fluid dynamics (CFD) modeling with heat transfer simulation across the stack. The distribution of heat in the stack under various loads was studied, and local points of overheating were determined. Based on the obtained data of the cooling air streamlines and velocity profiles, few ways of the heat distribution optimization along the stack were proposed. This optimization was achieved by changing the original shape of the FC cooling duct. The stable condition of the FC stack at constant load was determined.

show abstract

Direct analysis of lanthanum in extraction process by in-situ gamma spectrometry

Zhao

Xing

et al. 2022

J Radioanal Nucl Chem

View full text Add to dashboard Cite

La–Ni Based Alloy Modification by Ce and Fe for the Next Hydrogen Storage in Low-Temperature Metal Hydrides

Cited by 5 publications

References 15 publications

Influence of Fe on the Hydrogen Storage Properties of LaCeNi Alloys

Influence of Fe on the Hydrogen Storage Properties of LaCeNi Alloys

Heat Transfer Optimization of NEXA Ballard Low-Temperature PEMFC

Direct analysis of lanthanum in extraction process by in-situ gamma spectrometry

Contact Info

Product

Resources

About