Kinetic behaviour of low-Co AB5-type metal hydride electrodes

Tliha, M.; Boussami, S.; Mathlouthi, H.; Lamloumi, J.; Percheron-Guégan, A.

doi:10.1016/j.mseb.2010.07.003

Cited by 14 publications

(3 citation statements)

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“…Most of the Fe-substitution in rare-earth based AB 5 metal hydride (MH) alloys are for the purpose of replacing expensive Co [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. The general drawback of this approach is the resulting sacrifice in cycle life due to an increase in the pulverization rate during cycling.…”

Section: Introductionmentioning

confidence: 99%

Improvement in the low-temperature performance of AB5 metal hydride alloys by Fe-addition

Kim¹,

Ouchi²,

Reichman³

et al. 2011

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Improvement in the low-temperature performance of AB5 metal hydride alloys by Fe-addition

Kim¹,

Ouchi²,

Reichman³

et al. 2011

Journal of Alloys and Compounds

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“…Table 3 summarizes the C dl , C ad , C ab values and the coefficient of hydrogen diffusion, D H , defined by the following equation

D_{H} = {(\frac{R T Y_{0}}{n^{2} F^{2} S C_{0}})}^{2}

51 where C 0 is the diffusing species concentration (~0.022 mol/cm 3 ), before and after activation, and S denotes the geometrical working electrode‐surface area (~1 cm 2 ).…”

Section: Resultsmentioning

confidence: 99%

Electrochemical behavior of a spinel zinc ferrite alloy obtained by a simple sol‐gel route for Ni‐MH battery applications

Zayani

Azizi

El‐Nasser

et al. 2020

Intl J of Energy Research

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Summary The hydrogen storage properties of zinc ferrite spinel (ZnFe2O4) alloy were studied, in this work. This alloy, formed applying the sol‐gel technique, was employed as anode in Ni‐MH accumulators. X‐ray diffractogram analysis showed the appearance of the compound spinel with cubic structure. In fact, the crystallite size, specified by the TEM technique, was equal to 30 nm. The hydrogen storage properties of zinc ferrite spinel alloy were examined applying various electromechanical methods (chronopotentiometry, cyclic voltammetry, and chronoamperometry) at the C/10 rate and at room temperature. The maximum discharge capacity value was almost equal to 145 mAh/g. After 100 cycles, a good cycling stability was attained and correlation between the (DH/a2) ratio and the discharge capacity as noticed. The electrolyte/ZnFe2O4 anode interface prior to and following activation was studied utilizing electrochemical impedance spectroscopy.

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“…Ni-MH batteries have been extensively studied owing to their high capacities, fast charge and discharge capabilities, environment-friendly features and long cycle life. [8][9][10][11][12] The negative electrode of Ni-MH battery is constituted by a hydride-forming alloy and it is the most studied component in these batteries. 13,14 The alloy/electrolyte interaction is very important due to the fact that the alloy components suffer from corrosion processes generated by the high KOH concentration.…”

mentioning

confidence: 99%

Influence of Different Electrolyte Concentrations on the Performance of an AB₂-Type Alloy

Martínez

Ruiz

Visintín

2013

J. Electrochem. Soc.

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A systematic study about the effect of different electrolyte concentrations (KOH 2M, 4M, 6M and 8M) at 293 K on the electrochemical properties of Ti 12 Zr 21.5 V 10 Ni 38.4 Cr 4.5 Mn 13.6 AB 2 -type alloy was performed. This alloy can be used as active material of the negative electrode of nickel-metal hydride batteries. The variation in KOH concentration has influence in the activation processes, the discharge capacity and the cycle life of the AB 2 alloy. The maximum discharge capacity and the faster activation are reached at KOH 8M, whereas the better cycle life performance is achieved to KOH 4M. These are innovative results because previous research has not explicitly considered the type and composition of the studied alloy.

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Kinetic behaviour of low-Co AB5-type metal hydride electrodes

Cited by 14 publications

References 50 publications

Improvement in the low-temperature performance of AB5 metal hydride alloys by Fe-addition

Improvement in the low-temperature performance of AB5 metal hydride alloys by Fe-addition

Electrochemical behavior of a spinel zinc ferrite alloy obtained by a simple sol‐gel route for Ni‐MH battery applications

Influence of Different Electrolyte Concentrations on the Performance of an AB₂-Type Alloy

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Kinetic behaviour of low-Co AB5-type metal hydride electrodes

Cited by 14 publications

References 50 publications

Improvement in the low-temperature performance of AB5 metal hydride alloys by Fe-addition

Improvement in the low-temperature performance of AB5 metal hydride alloys by Fe-addition

Electrochemical behavior of a spinel zinc ferrite alloy obtained by a simple sol‐gel route for Ni‐MH battery applications

Influence of Different Electrolyte Concentrations on the Performance of an AB2-Type Alloy

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Influence of Different Electrolyte Concentrations on the Performance of an AB₂-Type Alloy