Approaching Better Cycleability of LiCoPO4 by Vanadium Modification Full article
Journal |
Journal of Materials Science and Engineering (A & B)
ISSN: 2161-6213 , E-ISSN: 2161-6221 |
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Output data | Year: 2016, Volume: 213, Pages: 105-113 Pages count : 9 DOI: 10.1016/j.mseb.2016.04.013 | ||||||||
Tags | Carbothermal reduction; Electrochemistry; Electrolytes; Lithium; Surface defects | ||||||||
Authors |
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Affiliations |
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Funding (2)
1 | The Ministry of Education and Science of the Russian Federation | 14.621.21.0004 (RFMEFI62114X0004) |
2 | Russian Foundation for Basic Research | 14-03-01082 |
Abstract:
A series of (1 − y)LiCoPO4·yLi3V2(PO4)3 with 0 ≤ y ≤ 1 was prepared via mechanochemically assisted carbothermal reduction at 750 °C. Structure and electrochemistry were studied by a complex of physico-chemical methods including XRD, NPD, FTIR, NEXAFS, TEM, EDX STEM, and galvanostatic cycling. It has been shown that only a small amount of V ions incorporates into the LiCoPO4 structure. The other V ions form monoclinic Li3V2(PO4)3. Incorporated V ions are in a mixed oxidation state and predominantly substitute for Co2+. The compensation mechanism for supervalent V ions substitution in LiCoPO4 involves the lithium vacancies formation. The as-prepared (1 − y)LiCoPO4·yLi3V2(PO4)3 with low y show the enhanced electrochemical behavior compared to pure LiCoPO4, especially in the 4.0–5.0 V range, due to a suitable amount of structural defects, which improve ionic and electronic conductivity, and to the presence of the Li-conductive Li3V2(PO4)3 on the surface of the LiCoPO4 particles promoting the deliverance of the Li ions from the electrolyte to the (0 1 0) facet.
Cite:
Kosova N.V.
, Podgornova O.A.
, Bobrikov I.A.
, Kaichev V.V.
, Bukhtiyarov A.V.
Approaching Better Cycleability of LiCoPO4 by Vanadium Modification
Journal of Materials Science and Engineering (A & B). 2016. V.213. P.105-113. DOI: 10.1016/j.mseb.2016.04.013 WOS Scopus РИНЦ
Approaching Better Cycleability of LiCoPO4 by Vanadium Modification
Journal of Materials Science and Engineering (A & B). 2016. V.213. P.105-113. DOI: 10.1016/j.mseb.2016.04.013 WOS Scopus РИНЦ
Dates:
Submitted: | Feb 4, 2016 |
Accepted: | Apr 19, 2016 |
Published online: | May 24, 2016 |
Published print: | Nov 1, 2016 |
Identifiers:
Web of science | WOS:000388058700012 |
Scopus | 2-s2.0-84969922447 |
Elibrary | 29464947 |
Chemical Abstracts | 2016:851384 |
Chemical Abstracts (print) | 165:513464 |
OpenAlex | W2408525629 |