Effect of Al and Mo substitution on the structural and hydrogen storage properties of CaNi5

Chumphongphan, Somwan; Paskevicius, Mark; Sheppard, Drew A.; Buckley, Craig E.

doi:10.1016/j.ijhydene.2012.11.107

Cited by 22 publications

(13 citation statements)

References 32 publications

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“…Materials such as CaNi5 have fast kinetics but present significant storage capacity loss upon hydrogen cycling due to the formation of "stable" hydrides. [232] The thermal conductivity of the metal hydride bed is another important parameter to ease the management of the ex(end)othermic reaction during hydrogen ab(des)sorption and prevent a "self-heating" or "self-cooling" of the hydride bed. Localised temperature variations will alter the hydrogen equilibrium pressure over the bed, causing some regions of the metal/hydride to absorb whilst others desorb.…”

Section: Metal Hydride Operating Parameters For Application In Concenmentioning

confidence: 99%

Hydrogen Storage Materials for Mobile and Stationary Applications: Current State of the Art

Lai¹,

Paskevicius²,

Sheppard³

et al. 2015

ChemSusChem

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212

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One of the limitations to the widespread use of hydrogen as an energy carrier is its storage in a safe and compact form. Herein, recent developments in effective high-capacity hydrogen storage materials are reviewed, with a special emphasis on light compounds, including those based on organic porous structures, boron, nitrogen, and aluminum. These elements and their related compounds hold the promise of high, reversible, and practical hydrogen storage capacity for mobile applications, including vehicles and portable power equipment, but also for the large scale and distributed storage of energy for stationary applications. Current understanding of the fundamental principles that govern the interaction of hydrogen with these light compounds is summarized, as well as basic strategies to meet practical targets of hydrogen uptake and release. The limitation of these strategies and current understanding is also discussed and new directions proposed.

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Section: Metal Hydride Operating Parameters For Application In Concenmentioning

confidence: 99%

Hydrogen Storage Materials for Mobile and Stationary Applications: Current State of the Art

Lai¹,

Paskevicius²,

Sheppard³

et al. 2015

ChemSusChem

Self Cite

348

212

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“…Certain alloys are commercially available such as heavily substituted Ti-Mn (Ti0.97Zr0.019V0.439Fe0.097Cr0.045Al0.026Mn1.5) [76], which have favourable properties. Other intermetallics excluded include those based on CaNi3, which show degradation in performance for only a minimal decrease in cost compared to CaNi5 [77,78], and solid solutions of Ti-Cr-V-Fe, which remain expensive even when produced with cheaper forms of vanadium such as ferrovanadium [12,79,80].…”

Section: Candidate Hydrides For Low-temperature Hydrogen Storagementioning

confidence: 99%

Metal hydrides for concentrating solar thermal power energy storage

et al. 2016

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The development of alternative methods for thermal energy storage is important for improving the efficiency and decreasing the cost for Concentrating Solarthermal Power (CSP). We focus on the underlying technology that allows metal hydrides to function as Thermal Energy Storage (TES) systems and highlight the current state-of-the-art materials that can operate at temperatures as low as room-temperature and as high as 1100 o C. The potential of metal hydrides for thermal storage is explored while current knowledge gaps about hydride properties, such as hydride thermodynamics, intrinsic kinetics and cyclic stability, are identified. The engineering challenges associated with utilising metal hydrides for high-temperature thermal energy storage are also addressed.

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“…Chumphongphan et al 41 The best value is observed for the alloy whose nickel is substituted by aluminum, where the most significant desorption pressure values are approximately 0.29, 0.27, 0.25 bar for CaNi 5 , CaNi 4.9 Al 0.1 and CaNi 4.9 Mo 0.1 alloys respectively.…”

Section: Introductionmentioning

confidence: 98%

Electrochemical properties of the CaNi _{5−
x} Mn _x electrodes synthesized by mechanical alloying

et al. 2020

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In this article, we exhaustively examined the effects of Mn substitution for Ni on the structures and electrochemical characterization of the CaNi 5−x Mn x (x = 0.2, 0.3, 0.5, 1) alloys prepared by mechanical synthesis for 40 hours at ball to powder weight ratio of 8:1. The characterization of electrodes was examined by X-ray diffraction, scanning electron microscope and electrochemical tests. In this context, the structural properties for each alloy have two major phases Ni, Ca 2 Ni 7 ; Ni, CaNi 3 ; Ni, CaNi 5 ; Ni, CaNi 3 where x = 0.2, 0.3, 0.5 and 1 respectively. The powder micrograph shows the existence of agglomerates has average particle size between 22 and 35 μm. In addition, the quantification by energy dispersive spectroscopy has been indicated the chemical composition of the all produced alloys is near their nominal composition. All electrodes are activated during the first cycle, independent of the Mn substitution rate. The highest values of discharge capacity and reversibility are obtained for x = 0.3 (125 mAh g −1 , 0.17 V) and x = 0.5 (119 mAh g −1 , 0.19 V) despite their low cycle stability. The evolution of D H /a 2 ratio and the I 0 exchange current density for the different Mn substitution rates is in accordance with that of the evolution of discharge capacities. The better kinetic properties is observed for x = 0.5 during electrochemical cycling.

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Effect of Al and Mo substitution on the structural and hydrogen storage properties of CaNi5

Cited by 22 publications

References 32 publications

Hydrogen Storage Materials for Mobile and Stationary Applications: Current State of the Art

Hydrogen Storage Materials for Mobile and Stationary Applications: Current State of the Art

Metal hydrides for concentrating solar thermal power energy storage

Electrochemical properties of the CaNi _{5−
x} Mn _x electrodes synthesized by mechanical alloying

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Effect of Al and Mo substitution on the structural and hydrogen storage properties of CaNi5

Cited by 22 publications

References 32 publications

Hydrogen Storage Materials for Mobile and Stationary Applications: Current State of the Art

Hydrogen Storage Materials for Mobile and Stationary Applications: Current State of the Art

Metal hydrides for concentrating solar thermal power energy storage

Electrochemical properties of the CaNi 5− x Mn x electrodes synthesized by mechanical alloying

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Product

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Electrochemical properties of the CaNi _{5−
x} Mn _x electrodes synthesized by mechanical alloying