Unraveling the Redox Couples of VIII/VIV Mixed-Valent Na3V2(PO4)2O1.6F1.4 Cathode by Parallel-Mode EPR and In Situ/Ex Situ NMR
Publication type: Journal Article
Publication date: 2018-11-13
scimago Q1
wos Q3
SJR: 0.914
CiteScore: 6.2
Impact factor: 3.2
ISSN: 19327447, 19327455
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Physical and Theoretical Chemistry
General Energy
Abstract
We herein present a study on the sodiation/desodiation behavior of Na3V2(PO4)2O1.6F1.4 cathode with I4/mmm tetragonal space group by the combination of dual-mode electron paramagnetic resonance (EPR) and in situ/ex situ solid-state nuclear magnetic resonance (SSNMR) techniques. The complementary parallel/perpendicular mode EPR, in situ 23Na NMR, 23Na/51V MAS NMR, and two-dimensional 23Na MQMAS NMR experiments substantiate that (i) both VIV and VIII are electrochemically active in this material, with the former transforming to VV, whereas the latter transforming to VIV; (ii) VIV continually converts to VV during the whole charge process, whereas VIII mostly reacts at the higher-potential charge plateau region; (iii) the Na+ extraction/intercalation process of Na3V2(PO4)2O1.6F1.4 is a widespread solid-solution mechanism; (iv) electronic spin hopping might occur locally between VIII and VV ions generated during the electrochemical reaction, resulting in the inconsecutive shift in 23Na resonance. This study s...
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Li C. et al. Unraveling the Redox Couples of VIII/VIV Mixed-Valent Na3V2(PO4)2O1.6F1.4 Cathode by Parallel-Mode EPR and In Situ/Ex Situ NMR // Journal of Physical Chemistry C. 2018. Vol. 122. No. 48. pp. 27224-27232.
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Li C., Shen M., Lou X., Hu B. Unraveling the Redox Couples of VIII/VIV Mixed-Valent Na3V2(PO4)2O1.6F1.4 Cathode by Parallel-Mode EPR and In Situ/Ex Situ NMR // Journal of Physical Chemistry C. 2018. Vol. 122. No. 48. pp. 27224-27232.
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TY - JOUR
DO - 10.1021/acs.jpcc.8b09151
UR - https://doi.org/10.1021/acs.jpcc.8b09151
TI - Unraveling the Redox Couples of VIII/VIV Mixed-Valent Na3V2(PO4)2O1.6F1.4 Cathode by Parallel-Mode EPR and In Situ/Ex Situ NMR
T2 - Journal of Physical Chemistry C
AU - Li, Chao
AU - Shen, Ming
AU - Lou, X
AU - Hu, Bingwen
PY - 2018
DA - 2018/11/13
PB - American Chemical Society (ACS)
SP - 27224-27232
IS - 48
VL - 122
SN - 1932-7447
SN - 1932-7455
ER -
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@article{2018_Li,
author = {Chao Li and Ming Shen and X Lou and Bingwen Hu},
title = {Unraveling the Redox Couples of VIII/VIV Mixed-Valent Na3V2(PO4)2O1.6F1.4 Cathode by Parallel-Mode EPR and In Situ/Ex Situ NMR},
journal = {Journal of Physical Chemistry C},
year = {2018},
volume = {122},
publisher = {American Chemical Society (ACS)},
month = {nov},
url = {https://doi.org/10.1021/acs.jpcc.8b09151},
number = {48},
pages = {27224--27232},
doi = {10.1021/acs.jpcc.8b09151}
}
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MLA
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Li, Chao, et al. “Unraveling the Redox Couples of VIII/VIV Mixed-Valent Na3V2(PO4)2O1.6F1.4 Cathode by Parallel-Mode EPR and In Situ/Ex Situ NMR.” Journal of Physical Chemistry C, vol. 122, no. 48, Nov. 2018, pp. 27224-27232. https://doi.org/10.1021/acs.jpcc.8b09151.
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