Stability of LaNi5-Co  alloys cycled in hydrogen — Part 1 evolution in gaseous hydrogen storage performance

Zhu, Zhida; Zhu, Shen; Lu, Huiqi; Wu, Jie; Yan, Kai; Cheng, Honghui; Liu, Jingjing

doi:10.1016/j.ijhydene.2019.04.111

Cited by 47 publications

(9 citation statements)

References 55 publications

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“…Among these three alloy samples, the alloy sample x = 0.2 had the highest hydrogen storage capacity (around 2 wt.%). This value of hydrogen storage capacity was higher than some different hydrogen storage alloy systems reported in previous studies (TiFe-based alloys [35][36][37][38], ZrCo-based alloys [21,39] and LaNi 5 -based alloys [40][41][42]). Further study, it was clear from Fig.…”

Section: First Hydrogenation Propertiescontrasting

confidence: 50%

Study on Hydrogen Storage Properties, Anti-Oxide Ability and Rate Limiting Step of ZrCr-Based Alloy after Introducing Cobalt as Additive

Huang¹,

Lv²,

Zhong³

et al. 2023

Journal of Renewable Materials

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In this work, the microstructure, hydrogen storage properties, anti-oxide ability and rate limiting step of Zr(Cr 1 −x Co x ) 2 (x = 0, 0.2, 0.4 and 0.6) alloys have been investigated. After studying the crystal structure, we found that all alloy samples could show C14-type phase but the alloy sample x = 0 could also show a small amount of Cr phase. Rietveld fitting showed that lattice parameter and unit cell volume of C14-type phase decreased with increasing x. After further research, it was clear that the first hydrogen absorption capacity decreased with increasing x. But introducing more Co content had a positive influence on the effective hydrogen storage capacity and cyclic hydrogen absorption and desorption properties of the alloy sample. We also found that adding Co to ZrCr 2 alloy could improve its anti-oxide ability. In addition to this, the rate limiting step model was also studied.

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Section: First Hydrogenation Propertiescontrasting

confidence: 50%

Study on Hydrogen Storage Properties, Anti-Oxide Ability and Rate Limiting Step of ZrCr-Based Alloy after Introducing Cobalt as Additive

Huang¹,

Lv²,

Zhong³

et al. 2023

Journal of Renewable Materials

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“…A similar effect has also been observed in various LaNi 5 -based alloys such as LaNi 4.8 Al 0.2 , LaNi 4.6 Si 0.4 , LaNi 4.6 Sn 0.4 , and LaNi 4.75 Fe 0.25 (Table ). ,,− ,− Nevertheless, iron and cobalt have a lower potential to affect hydride stability and hydrogen pressure than Al, Si, or Sn . However, in the studied alloys Fe7 SC and Fe12 SC with similar matrix cell volumes, the p eq value of alloy Fe12 SC was significantly decreased.…”

Section: Resultsmentioning

confidence: 91%

Influence of Fe on the Hydrogen Storage Properties of LaCeNi Alloys

Král

Chesalkin²,

Čermák

et al. 2023

Langmuir

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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.

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“…Several methods, such as arc fusion, 14,15 induction fusion 16,17 and mechanosynthesis 18,19 are used to produce hydrogen storage materials. The most efficient technique is high‐energy mechanical milling characterized by its ability to facilitate powder synthesis, its low cost and its functioning at room temperature 20,21 .…”

Section: Introductionmentioning

confidence: 99%

Electrochemical properties of theCaNi₄_.₈M_0.2(MMg, Zn, and Mn) mechanical milling alloys used as anode materials in nickel‐metal hydride batteries

Karaoud

Dabaki

Khaldi

et al. 2023

Env Prog and Sustain Energy

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The present research work examines the electrochemical properties of CaNi4.8M0.2(MMg, Zn) type alloy applied as an anode in nickel metal hybrid batteries. Based on an extensive study of the CaNi4.8Mn0.2 compound prepared by mecano‐synthesis; under an argon atmosphere, with a variation of milling time and weigh ratio, using a Retsch PM400 type ball mill. The experimental results show that the excellent electrochemical properties were obtained for a milling time of 40 h and a ball‐to‐powder weight ratio equal to 8:1. Based on this study, we examined electrochemically the CaNi4.8M0.2(MMg, Zn, and Mn) compound according to the optimized parameters. Several methods, such as galvanostatic polarization and potentiodynamic polarization, were applied to characterize these electrodes. CaNi4.8M0.2(MMg, Zn, and Mn) electrodes were activated, respectively, during the first, second, and third cycles. The maximum discharge capacity was about 87, 60, and 96 mAhg−1 at ambient temperature. These electrochemical findings correlate with the kinetic results provided during a long cycle.

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Stability of LaNi5-Co alloys cycled in hydrogen — Part 1 evolution in gaseous hydrogen storage performance

Cited by 47 publications

References 55 publications

Study on Hydrogen Storage Properties, Anti-Oxide Ability and Rate Limiting Step of ZrCr-Based Alloy after Introducing Cobalt as Additive

Study on Hydrogen Storage Properties, Anti-Oxide Ability and Rate Limiting Step of ZrCr-Based Alloy after Introducing Cobalt as Additive

Influence of Fe on the Hydrogen Storage Properties of LaCeNi Alloys

Electrochemical properties of theCaNi₄_.₈M_0.2(MMg, Zn, and Mn) mechanical milling alloys used as anode materials in nickel‐metal hydride batteries

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Stability of LaNi5-Co alloys cycled in hydrogen — Part 1 evolution in gaseous hydrogen storage performance

Cited by 47 publications

References 55 publications

Study on Hydrogen Storage Properties, Anti-Oxide Ability and Rate Limiting Step of ZrCr-Based Alloy after Introducing Cobalt as Additive

Study on Hydrogen Storage Properties, Anti-Oxide Ability and Rate Limiting Step of ZrCr-Based Alloy after Introducing Cobalt as Additive

Influence of Fe on the Hydrogen Storage Properties of LaCeNi Alloys

Electrochemical properties of theCaNi4.8M0.2(MMg, Zn, and Mn) mechanical milling alloys used as anode materials in nickel‐metal hydride batteries

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Electrochemical properties of theCaNi₄_.₈M_0.2(MMg, Zn, and Mn) mechanical milling alloys used as anode materials in nickel‐metal hydride batteries