Journal of Solid State Chemistry, volume 286, pages 121294

Anionic substitution in LiMnPO4: The Li1-xMn1+x(PO4)1-y-z(VO4)y(OH)4z solid solutions prepared with a microwave-assisted hydrothermal method

Publication typeJournal Article
Publication date2020-06-01
Quartile SCImago
Q2
Quartile WOS
Q2
Impact factor3.3
ISSN00224596, 1095726X
Materials Chemistry
Ceramics and Composites
Electronic, Optical and Magnetic Materials
Inorganic Chemistry
Physical and Theoretical Chemistry
Condensed Matter Physics
Abstract
Attempts to introduce vanadium doping into the olivine-structured LiMnPO 4 cathode material for the Li-ion batteries resulted in the ( y ​+ ​ z )PO 4 3− → y VO 4 3− ​+ ​4 z OH − ( y ​< ​0.17, z ​≤ ​0.1) co-substitution and the formation of the hydrotriphylite-type Li 1− x Mn 1+ x (PO 4 ) 1− y−z (VO 4 ) y (OH) 4z solid solutions. Their crystal structure and chemical composition were studied with Rietveld structure refinement from synchrotron X-ray powder diffraction data, energy-dispersive X-ray analysis, infrared and Raman spectroscopy, electron energy loss analysis and mass spectrometry. Li 0.96 Mn 1.04 (PO 4 ) 0.74 (VO 4 ) 0.16 (OH) 0.4 crystallizes in the space group Pnma and a ​= ​10.5150(2) Å, b ​= ​6.11773(9) Å and c ​= ​4.78555(9) Å with up to 5% of Mn in the Li position. Charge compensation is achieved through partial oxidation of the Mn cations to the oxidation state above +2. The heterovalent substitution in anionic sublattice and defectiveness of the cationic one cause blocking of Li-ion diffusion channels that drastically impede the electrochemical performance resulting in electrochemical capacity not exceeding 35 mAh g −1 . • Li 1− x Mn 1+ x (PO 4 ) 1− y−z (VO 4 ) y (OH) 4z solid solutions were prepared by microwave hydrothermal method. • The crystal structure was determined from synchrotron X-ray powder diffraction data. • VO 4 3− and OH − groups simultaneously incorporate into anionic sublattice. • “LiMn(PO 4 ) 1− y (VO 4 ) y “ demonstrate limited electrochemical activity in Li-ion cell.

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Kirsanova M. A., Ryazantsev S., Abakumov A. M. Anionic substitution in LiMnPO4: The Li1-xMn1+x(PO4)1-y-z(VO4)y(OH)4z solid solutions prepared with a microwave-assisted hydrothermal method // Journal of Solid State Chemistry. 2020. Vol. 286. p. 121294.
GOST all authors (up to 50) Copy
Kirsanova M. A., Ryazantsev S., Abakumov A. M. Anionic substitution in LiMnPO4: The Li1-xMn1+x(PO4)1-y-z(VO4)y(OH)4z solid solutions prepared with a microwave-assisted hydrothermal method // Journal of Solid State Chemistry. 2020. Vol. 286. p. 121294.
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TY - JOUR
DO - 10.1016/j.jssc.2020.121294
UR - https://doi.org/10.1016%2Fj.jssc.2020.121294
TI - Anionic substitution in LiMnPO4: The Li1-xMn1+x(PO4)1-y-z(VO4)y(OH)4z solid solutions prepared with a microwave-assisted hydrothermal method
T2 - Journal of Solid State Chemistry
AU - Kirsanova, Maria A
AU - Ryazantsev, Sergey
AU - Abakumov, Artem M.
PY - 2020
DA - 2020/06/01 00:00:00
PB - Elsevier
SP - 121294
VL - 286
SN - 0022-4596
SN - 1095-726X
ER -
BibTex
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BibTex Copy
@article{2020_Kirsanova,
author = {Maria A Kirsanova and Sergey Ryazantsev and Artem M. Abakumov},
title = {Anionic substitution in LiMnPO4: The Li1-xMn1+x(PO4)1-y-z(VO4)y(OH)4z solid solutions prepared with a microwave-assisted hydrothermal method},
journal = {Journal of Solid State Chemistry},
year = {2020},
volume = {286},
publisher = {Elsevier},
month = {jun},
url = {https://doi.org/10.1016%2Fj.jssc.2020.121294},
pages = {121294},
doi = {10.1016/j.jssc.2020.121294}
}
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