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Approaching Better Cycleability of LiCoPO4 by Vanadium Modification Научная публикация

Общее Язык: Английский, Жанр: Статья (Full article),
Статус опубликования: Опубликована, Оригинальность: Оригинальная
Журнал Journal of Materials Science and Engineering (A & B)
ISSN: 2161-6213 , E-ISSN: 2161-6221
Вых. Данные Год: 2016, Том: 213, Страницы: 105-113 Страниц : 9 DOI: 10.1016/j.mseb.2016.04.013
Авторы Kosova N.V. 1 , Podgornova O.A. 1 , Bobrikov I.A. 2 , Kaichev V.V. 3,4 , Bukhtiyarov A.V. 3
Организации
1 Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, 18 Kutateladze, 630128 Novosibirsk, Russia
2 Joint Institute for Nuclear Research, 6 Joliot-Curie, 141980 Dubna, Russia
3 Boreskov’ Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, 5 pr. Lavrent’eva, 630090 Novosibirsk, Russia
4 Novosibirsk State University, 2 Pirogova, 630090 Novosibirsk, Russia

Информация о финансировании (2)

1 Министерство образования и науки Российской Федерации 14.621.21.0004 (RFMEFI62114X0004)
2 Российский фонд фундаментальных исследований 14-03-01082

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
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:
Web of science WOS:000388058700012
Scopus 2-s2.0-84969922447
РИНЦ 29464947
Chemical Abstracts 2016:851384
Chemical Abstracts (print) 165:513464
Альметрики: