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Electrochemical reactivity of In-Pb solid solution as a negative electrode for rechargeable Mg-ion batteries

Lucie Blondeau 1 Suzy Surblé 1 Eddy Foy 2 Hicham Khodja 1 Magali Gauthier 1
1 LEEL - UMR 3685 - Laboratoire d'Etudes des Eléments Légers
NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)
2 LAPA - UMR 3685 - Laboratoire Archéomatériaux et Prévision de l'Altération
NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)
Abstract : A composite In-Pb:carbon was successfully synthetized by a two-step mechanochemical synthesis in order to obtain an adequate particles size and structure to investigate the electrochemical reactivity of the In-Pb solid solution towards Mg. A potential synergetic coupling of electroactive elements In and Pb was examined using electrochemical and ex situ X-ray diffraction analyses. The potential profile of the solid solution indicates the formation of Mg2Pb and MgIn. However, the diffraction study suggests a peculiar electrochemically-driven amorphization of MgIn during the magnesiation, in strong contrast to MgIn crystallization in In-based and InBi-based electrodes reported in the literature. Combining In and Pb favors the amorphization of MgIn and a high first magnesiation capacity of about 550 mAh g−1, but is thereafter detrimental to the material’s reversibility. These results emphasize the possible influence of electrochemically-driven amorphization and crystallization processes on electrochemical performance of battery materials.
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https://hal-cea.archives-ouvertes.fr/cea-02907955
Contributor : Serge Palacin <>
Submitted on : Tuesday, July 28, 2020 - 9:13:48 AM
Last modification on : Saturday, October 10, 2020 - 3:07:31 AM

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Lucie Blondeau, Suzy Surblé, Eddy Foy, Hicham Khodja, Magali Gauthier. Electrochemical reactivity of In-Pb solid solution as a negative electrode for rechargeable Mg-ion batteries. Journal of Energy Chemistry, Elsevier, 2020, 55, pp.124-128. ⟨10.1016/j.jechem.2020.07.004⟩. ⟨cea-02907955⟩

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