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Structure and Electrochemical Behavior of ZnLaFeO 4 Alloy as a Negative Electrode in Ni-MH Batteries.

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Title: Structure and Electrochemical Behavior of ZnLaFeO 4 Alloy as a Negative Electrode in Ni-MH Batteries.
Authors: Gharbi, Houyem1 (AUTHOR), Zayani, Wissem1,2 (AUTHOR), Dabaki, Youssef1,3 (AUTHOR), Khaldi, Chokri1,4 (AUTHOR), ElKedim, Omar4,5 (AUTHOR), Fenineche, Nouredine1,5 (AUTHOR) nour-eddine.fenineche@utbm.fr, Lamloumi, Jilani1,2 (AUTHOR)
Source: Energies (19961073). Jul2025, Vol. 18 Issue 13, p3251. 18p.
Subjects: Nickel-metal hydride batteries, Negative electrode, Doping agents (Chemistry), Crystal structure, Electric resistance, Electrochemical analysis, Metallic oxides, Electrode performance
Abstract: This study focuses on the structural and electrochemical behavior of the compound ZnLaFeO4 as a negative electrode material for nickel–metal hydride (Ni-MH) batteries. The material was synthesized by a sol–gel hydrothermal method to assess the influence of lanthanum doping on the ZnFe2O4 spinel structure. X-ray diffraction revealed the formation of a dominant LaFeO3 perovskite phase, with ZnFe2O4 and La2O3 as secondary phases. SEM analysis showed agglomerated grains with an irregular morphology. Electrochemical characterization at room temperature and a discharge rate of C/10 (full charge in 10 h) revealed a maximum discharge capacity of 106 mAhg−1. Although La3+ doping modified the microstructure and slowed the activation process, the electrode exhibited stable cycling with moderate polarization behavior. The decrease in capacity during cycling is due mainly to higher internal resistance. These results highlight the potential and limitations of La-doped spinel ferrites as alternative negative electrodes for Ni-MH systems. [ABSTRACT FROM AUTHOR]
Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Structure and Electrochemical Behavior of ZnLaFeO 4 Alloy as a Negative Electrode in Ni-MH Batteries.
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  Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Jul2025, Vol. 18 Issue 13, p3251. 18p.
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  Data: <searchLink fieldCode="DE" term="%22Nickel-metal+hydride+batteries%22">Nickel-metal hydride batteries</searchLink><br /><searchLink fieldCode="DE" term="%22Negative+electrode%22">Negative electrode</searchLink><br /><searchLink fieldCode="DE" term="%22Doping+agents+%28Chemistry%29%22">Doping agents (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Crystal+structure%22">Crystal structure</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+resistance%22">Electric resistance</searchLink><br /><searchLink fieldCode="DE" term="%22Electrochemical+analysis%22">Electrochemical analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Metallic+oxides%22">Metallic oxides</searchLink><br /><searchLink fieldCode="DE" term="%22Electrode+performance%22">Electrode performance</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This study focuses on the structural and electrochemical behavior of the compound ZnLaFeO4 as a negative electrode material for nickel–metal hydride (Ni-MH) batteries. The material was synthesized by a sol–gel hydrothermal method to assess the influence of lanthanum doping on the ZnFe2O4 spinel structure. X-ray diffraction revealed the formation of a dominant LaFeO3 perovskite phase, with ZnFe2O4 and La2O3 as secondary phases. SEM analysis showed agglomerated grains with an irregular morphology. Electrochemical characterization at room temperature and a discharge rate of C/10 (full charge in 10 h) revealed a maximum discharge capacity of 106 mAhg−1. Although La3+ doping modified the microstructure and slowed the activation process, the electrode exhibited stable cycling with moderate polarization behavior. The decrease in capacity during cycling is due mainly to higher internal resistance. These results highlight the potential and limitations of La-doped spinel ferrites as alternative negative electrodes for Ni-MH systems. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – SubjectFull: Crystal structure
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      – SubjectFull: Electric resistance
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      – SubjectFull: Metallic oxides
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      – SubjectFull: Electrode performance
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      – TitleFull: Structure and Electrochemical Behavior of ZnLaFeO 4 Alloy as a Negative Electrode in Ni-MH Batteries.
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              M: 07
              Text: Jul2025
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              Y: 2025
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