Approaching Better Cycleability of LiCoPO4 by Vanadium Modification Научная публикация
Журнал |
Journal of Materials Science and Engineering (A & B)
ISSN: 2161-6213 , E-ISSN: 2161-6221 |
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Вых. Данные | Год: 2016, Том: 213, Страницы: 105-113 Страниц : 9 DOI: 10.1016/j.mseb.2016.04.013 | ||||||||
Ключевые слова | Carbothermal reduction; Electrochemistry; Electrolytes; Lithium; Surface defects | ||||||||
Авторы |
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Организации |
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Реферат:
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.
Библиографическая ссылка:
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 CAPlusCA OpenAlex
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 CAPlusCA OpenAlex
Даты:
Поступила в редакцию: | 4 февр. 2016 г. |
Принята к публикации: | 19 апр. 2016 г. |
Опубликована online: | 24 мая 2016 г. |
Опубликована в печати: | 1 нояб. 2016 г. |
Идентификаторы БД:
Web of science: | WOS:000388058700012 |
Scopus: | 2-s2.0-84969922447 |
РИНЦ: | 29464947 |
Chemical Abstracts: | 2016:851384 |
Chemical Abstracts (print): | 165:513464 |
OpenAlex: | W2408525629 |