Volume 45, Issue 4 pp. 5235-5247
RESEARCH ARTICLE

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

Wissem Zayani

Wissem Zayani

ENSIT, Laboratory of Mechanics, Materials and Processes (LR99ES05), University of Tunis, Tunis, Tunisia

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Samir Azizi

Corresponding Author

Samir Azizi

ENSIT, Laboratory of Mechanics, Materials and Processes (LR99ES05), University of Tunis, Tunis, Tunisia

Correspondence

Samir Azizi, ENSIT, Laboratory of Mechanics, Materials and Processes (LR99ES05), University of Tunis, 1008 Montfleury, Tunis, Tunisia.

Email: [email protected], [email protected]

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Karam S. El-Nasser

Karam S. El-Nasser

Chemistry Department, College of Science and Arts, Aljouf University, Alqurayyat, Saudi Arabia

Department of Chemistry, Faculty of Science, Al-Azhar University, Assuite, Egypt

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Ibraheem Othman Ali

Ibraheem Othman Ali

Chemistry Department, College of Science and Arts, Aljouf University, Alqurayyat, Saudi Arabia

Department of Chemistry, Faculty of Science, Al-Azhar University, Cairo, Egypt

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Michel Molière

Michel Molière

Laboratoire ICB-UTBM/LERMPS, Belfort Cedex, France

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Nouredine Fenineche

Nouredine Fenineche

Laboratoire ICB-UTBM/LERMPS, Belfort Cedex, France

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Hamadi Mathlouthi

Hamadi Mathlouthi

ENSIT, Laboratory of Mechanics, Materials and Processes (LR99ES05), University of Tunis, Tunis, Tunisia

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Jilani Lamloumi

Jilani Lamloumi

ENSIT, Laboratory of Mechanics, Materials and Processes (LR99ES05), University of Tunis, Tunis, Tunisia

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First published: 27 October 2020
Citations: 32

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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