Title
Synthesis, structure and electrochemical properties of <tex>$LiNaCo_{0.5}Fe_{0.5}PO_{4}F$</tex> fluoride-phosphate Synthesis, structure and electrochemical properties of <tex>$LiNaCo_{0.5}Fe_{0.5}PO_{4}F$</tex> fluoride-phosphate
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
San diego :Academic press inc elsevier science ,
Subject
Physics
Chemistry
Source (journal)
Journal of solid state chemistry. - London
Volume/pages
242(2016) :2 , p. 70-77
ISSN
0022-4596
ISI
000383304900010
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
LiNaCo0.5Fe0.5PO4F fluoride-phosphate was synthesized via conventional solid-state and novel freeze-drying routes. The crystal structure was refined based on neutron powder diffraction (NPD) data and validated by electron diffraction (ED) and high-resolution transmission electron microscopy (HRTEM). The alkali ions are ordered in LiNaCo0.5Fe0.5PO4F and the transition metals jointly occupy the same crystallographic sites. The oxidation state and oxygen coordination environment of the Fe atoms were verified by 57Fe Mössbauer spectroscopy. Electrochemical tests of the LiNaCo0.5Fe0.5PO4F cathode material demonstrated a reversible activity of the Fe3+/Fe2+ redox couple at the electrode potential near 3.4 V and minor activity of the Co3+/Co2+ redox couple over 5 V vs Li/Li+. The material exhibited the discharge capacity of more than 82% (theo.) regarding Fe3+/Fe2+ in the 2.4÷4.6 V vs Li/Li+ potential range.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/48da9b/133776.pdf
E-info
https://repository.uantwerpen.be/docman/iruaauth/4aedd4/133776.pdf
Handle