Title
Cation exchange mediated elimination of the Fe-antisites in the hydrothermal synthesis of <tex>$LiFePO_{4}$</tex> Cation exchange mediated elimination of the Fe-antisites in the hydrothermal synthesis of <tex>$LiFePO_{4}$</tex>
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Amsterdam :Elsevier science bv ,
Subject
Physics
Chemistry
Engineering sciences. Technology
Source (journal)
Nano energy. - -
Volume/pages
16(2015) , p. 256-267
ISSN
2211-2855
ISI
000364579300027
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
In this work we elucidate the elimination of mechanism Fe-antisite defects in lithium iron phosphate (LiFePO4) during the hydrothermal synthesis. Compelling evidence of this effect is provided by combining Neutron Powder Diffraction (NPD), High Resolution (Scanning) Transmission Electron Microscopy (HR-(S)TEM), Electron Energy Loss Spectroscopy (EELS), X-Ray Photoelectron Spectroscopy (XPS) and calculations. We found: i) the first intermediate vivianite inevitably creates Fe-antisite defects in LiFePO4; ii) the removal of these antisite defects by cation exchange is assisted by a nanometer-thick amorphous layer, rich in Li, that enwraps the LiFePO4 crystals.
E-info
https://repository.uantwerpen.be/docman/iruaauth/8580a4/89ae3a5efec.pdf
Full text (open access)
https://repository.uantwerpen.be/docman/irua/a96261/10808.pdf
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