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

Somia M. Abbas, Ahmed M. Hashem, Ashraf E. Abdel-Ghany, Eman H. Ismail, Mário Kotlár, Martin Winter, Jie Li and Christian M. Julien
Additional contact information
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
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
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

Energies, 2020, vol. 13, issue 19, 1-24

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).

Keywords: spinel LiMn 2 O 4; Ag nanoparticles; surface modification; insertion electrode; cathode; Li-ion batteries (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/13/19/5194/pdf (application/pdf)
https://www.mdpi.com/1996-1073/13/19/5194/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:13:y:2020:i:19:p:5194-:d:424045

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().