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Ag-Modified LiMn 2 O 4 Cathode for Lithium-Ion Batteries: Coating Functionalization

Author

Listed:
  • Somia M. Abbas

    (Inorganic Chemistry Department, National Research Centre, 33 El Bohouth St. (former El Tahrir St.), Dokki-Giza 12622, Egypt)

  • Ahmed M. Hashem

    (Inorganic Chemistry Department, National Research Centre, 33 El Bohouth St. (former El Tahrir St.), Dokki-Giza 12622, Egypt
    Helmholtz-Institute Muenster (IEK-12) Forschungszentrum Juelich GmbH, Corrensstr. 46, D-48149 Muenster, Germany)

  • Ashraf E. Abdel-Ghany

    (Inorganic Chemistry Department, National Research Centre, 33 El Bohouth St. (former El Tahrir St.), Dokki-Giza 12622, Egypt)

  • Eman H. Ismail

    (Chemistry Department, Faculty of Science, Ain Shams University, Abbassia, Cairo 11566, Egypt)

  • Mário Kotlár

    (Centre for Nanodiagnostics, Slovak University of Technology, University Science Park Bratislava Centre, Vazovova 5, 812 43 Bratislava, Slovakia)

  • Martin Winter

    (Helmholtz-Institute Muenster (IEK-12) Forschungszentrum Juelich GmbH, Corrensstr. 46, D-48149 Muenster, Germany
    MEET Battery Research Center, Institute of Physical Chemistry, University of Muenster, Corrensstr. 46, D-48149 Muenster, Germany)

  • Jie Li

    (Helmholtz-Institute Muenster (IEK-12) Forschungszentrum Juelich GmbH, Corrensstr. 46, D-48149 Muenster, Germany)

  • Christian M. Julien

    (Institut de Minéralogie, Physique des Matériaux et Cosmologie (IMPMC), Sorbonne Université, CNRS-UMR 7590, 4 Place Jussieu, 75252 Paris, France)

Abstract

In this work, the properties of silver-modified LiMn 2 O 4 cathode materials are revisited. We study the influence of calcination atmosphere on the properties of the Ag-coated LiMn 2 O 4 (Ag/LMO) and highlight the silver oxidation. The effect of the heat treatment in vacuum is compared with that in air by the characterization of the structure, specific surface area, Li transport properties and electrochemical performance of Ag/LMO composites. Surface analyses (XPS and Raman spectroscopy) show that the nature of the coating (~3 wt.%) differs with the calcination atmosphere: Ag/LMO(v) calcined in vacuum displays Ag nanospheres and minor AgO content on its surface (specific surface area of 4.1 m 2 g −1 ), while Ag/LMO(a) treated in air is mainly covered by the AgO insulating phase (specific surface area of 0.6 m 2 g −1 ). Electrochemical experiments emphasize that ~3 wt.% Ag coating is effective to minimize the drawbacks of the spinel LiMn 2 O 4 (Mn dissolution, cycling instability, etc.). The Ag/LMO(v) electrode shows high capacity retention, good cyclability at C/2 rate and capacity fade of 0.06% per cycle (in 60 cycles).

Suggested Citation

  • Somia M. Abbas & Ahmed M. Hashem & Ashraf E. Abdel-Ghany & Eman H. Ismail & Mário Kotlár & Martin Winter & Jie Li & Christian M. Julien, 2020. "Ag-Modified LiMn 2 O 4 Cathode for Lithium-Ion Batteries: Coating Functionalization," Energies, MDPI, vol. 13(19), pages 1-24, October.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:19:p:5194-:d:424045
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    References listed on IDEAS

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    1. Altug S. Poyraz & Chung-Hao Kuo & Sourav Biswas & Cecil K. King’ondu & Steven L. Suib, 2013. "A general approach to crystalline and monomodal pore size mesoporous materials," Nature Communications, Nature, vol. 4(1), pages 1-10, December.
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