The effect of the temperature on the electrochemical properties of the hydrogen storage alloy for nickel–metal hydride accumulators

Khaldi, Chokri; Boussami, S.; Tliha, M.; Azizi, Samir; Fenineche, N.; Elkedim, O.; Mathlouthi, H.; Lamloumi, J.

doi:10.1016/j.jallcom.2013.04.046

Cited by 35 publications

(18 citation statements)

References 33 publications

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“…where b is the Tafel slope of cathodic-and anodic straight lines of the hydrogen electrode, equal to 0.12 V on LaNi 5 type materials in strong alkaline solutions [26][27][28][29][30]. More details relating electrochemical measurement procedure can be found in our previously published papers [6,7,[12][13][14][15][16][17][18][19]].…”

Section: Methodsmentioning

confidence: 99%

Electrochemical hydrogenation properties of LaNi4.6Zn0.4−Sn alloys

Dymek

Rozdzynska-Kielbik

Pavlyuk

et al. 2015

Journal of Alloys and Compounds

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Section: Methodsmentioning

confidence: 99%

Electrochemical hydrogenation properties of LaNi4.6Zn0.4−Sn alloys

Dymek

Rozdzynska-Kielbik

Pavlyuk

et al. 2015

Journal of Alloys and Compounds

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“…Recently, our paper showed that the electrochemistry capacity of the LaGaO 3 oxide can reach 220 mAh g −1 and suggested the possibility of using this oxide as new electrode materials in the Ni‐MH hydrogen batteries at high temperature (328 K) . The literature shows that there is a narrow relationship between temperature and electrochemical properties of hydrogen storage alloys of different kinds …”

Section: Introductionmentioning

confidence: 94%

“…22 The literature shows that there is a narrow relationship between temperature and electrochemical properties of hydrogen storage alloys of different kinds. [23][24][25][26] In this work, we describe the influence of the temperature on the electrochemical behavior of the LaGaO 3 electrode oxide used as a new negative hydrogen electrode, and its hydrogen storage mechanisms were evaluated by different electrochemical techniques.…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on behavior of perovskite-type oxide LaGaO₃ used as a novel anode material for Ni-MH secondary batteries

et al. 2018

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Summary To obtain a novel negative electrode for nickel‐metal hydride rechargeable batteries, perovskite‐type oxide LaGaO3 was synthesized by the sol‐gel method. The electrochemical properties of the oxide were systematically investigated at different temperatures by using galvanostatic, chronoamperometric, and potentiodynamic polarization methods. We have selected 298, 313, and 328 K as room, intermediate, and high temperatures, respectively. The galvanostatic results showed that the discharge capacity of the oxide LaGaO3 increased with the temperature elevating during the first 3 cycles. This oxide has the highest discharge capacity of about 220 mAh g−1at high temperature. For room and intermediate temperatures, we observed that the discharge capacity maintains a constant about of 5 and 13 mAh g−1 for 298 and 313 K, respectively, when the number of cycles is increased. The electrochemical kinetic analysis indicates that the exchange current density and the hydrogen diffusion coefficient of the oxide LaGaO3 increase with the rise in temperature. The apparent activation energy (Ea) for hydrogen diffusion process and the activation energy (ΔrH*) for charge‐transfer reaction of the investigated oxide electrode LaGaO3 are estimated. The calculated values of the Ea and ΔrH* are 117.46 and 105 kJ mol−1, respectively. The above experimental results indicated that the kinetic properties of the working electrode have been significantly improved by the elevating of the temperature. The best electrochemical performance (faster activation and highest maximum capacity) of the oxide electrode is obtained at high temperature (328 K).

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“…There are many papers dealing with the mechanism of hydrogen incorporation [21,22] or energy charge/ discharge in batteries [23]. Most of them show that there are three models of hydriding kinetics: (1) a model with no two-phase (α−β) region; (2) a model with a definite width of α−β two-phase region; and (3) a model having an entirely two-phase α+β region in its initial and later stages.…”

Section: On the Theoretical Modelmentioning

confidence: 99%

Theoretical model for AB5 alloy hydride formation: the electrochemical activation of the hydrogen diffusion process

Téliz

Díaz

Zinola

2015

J Solid State Electrochem

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This paper examines the hydrogen diffusion process during activation cycles in LaNi 3.6 Co 0.7 Mn 0.4−x Mo x Al 0.3 alloys with x=0; 0.1 and 0.25 in strong alkaline solutions. The effect of molybdenum substitution was analyzed by potential, composition, and temperature (E-c-T) and charge/discharge curves. Hysteresis values and the potential between charge/ discharge curves have been used as parameters for efficiency loss. Further, electrochemical impedance spectroscopy was carried out in order to visualize the charge transfer and diffusion component during activation process. A mathematical approach is presented here based on the mechanism involved in the course of the hydriding reaction solving a spherical second Fick's law. Thus, adsorbed hydrogen is considered to be transferred from the surface to inner sites, and the diffusion into the bulk of the alloy is demonstrated to be the slow route. Diffusion overpotentials and time constants for AB 5 alloys were calculated as a function of the number of hydrogenation cycles. These results show that the molybdenum content has positive effects in kinetic behavior.

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The effect of the temperature on the electrochemical properties of the hydrogen storage alloy for nickel–metal hydride accumulators

Cited by 35 publications

References 33 publications

Electrochemical hydrogenation properties of LaNi4.6Zn0.4−Sn alloys

Electrochemical hydrogenation properties of LaNi4.6Zn0.4−Sn alloys

Effect of temperature on behavior of perovskite-type oxide LaGaO₃ used as a novel anode material for Ni-MH secondary batteries

Theoretical model for AB5 alloy hydride formation: the electrochemical activation of the hydrogen diffusion process

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The effect of the temperature on the electrochemical properties of the hydrogen storage alloy for nickel–metal hydride accumulators

Cited by 35 publications

References 33 publications

Electrochemical hydrogenation properties of LaNi4.6Zn0.4−Sn alloys

Electrochemical hydrogenation properties of LaNi4.6Zn0.4−Sn alloys

Effect of temperature on behavior of perovskite-type oxide LaGaO3 used as a novel anode material for Ni-MH secondary batteries

Theoretical model for AB5 alloy hydride formation: the electrochemical activation of the hydrogen diffusion process

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Effect of temperature on behavior of perovskite-type oxide LaGaO₃ used as a novel anode material for Ni-MH secondary batteries