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Effect of nanostructured carbon coatings on the electrochemical performance of Li1.4Ni0.5Mn0.5O2+x-based cathode materialsстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 апреля 2017 г.
- Авторы: Kurilenko Konstantin A., Shlyakhtin Oleg A., Brylev Oleg A., Petukhov Dmitry I., Garshev Alexey V.
- Журнал: Beilstein journal of nanotechnology
- Том: 7
- Год издания: 2016
- Издательство: Beilstein-Institut zur Förderung der Chemischen Wissenschaften
- Местоположение издательства: Frankfurt am Main, Germany
- Первая страница: 1960
- Последняя страница: 1970
- DOI: 10.3762/bjnano.7.187
- Аннотация: Nanocomposites of Li1.4Ni0.5Mn0.5O2+x and amorphous carbon were obtained by the pyrolysis of linear and cross-linked poly(vinyl alcohol) (PVA) in presence of Li1.4Ni0.5Mn0.5O2+x. In the case of linear PVA, the formation of nanostructured carbon coatings on Li1.4Ni0.5Mn0.5O2+x particles is observed, while for cross-linked PVA islands of mesoporous carbon are located on the boundaries of Li1.4Ni0.5Mn0.5O2+x particles. The presence of the carbon framework leads to a decrease of the polarization upon cycling and of the charge transfer resistance and to an increase in the apparent Li+ diffusion coefficient from 10−16 cm2·s−1(pure Li1.4Ni0.5Mn0.5O2+x) to 10−13 cm2·s−1. The nanosized carbon coatings also reduce the deep electrochemical degradation of Li1.4Ni0.5Mn0.5O2+x during electrochemical cycling. The nanocomposite obtained by the pyrolysis of linear PVA demonstrates higher values of the apparent lithium diffusion coefficient, a higher specific capacity and lower values of charge transfer resistance, which can be related to the more uniform carbon coatings and to the significant content of sp2 -hybridized carbon detected by XPS and by Raman spectroscopy. This is an Open Access article under the terms of the Creative Commons Attribution License http://www.beilstein-journals.org/bjnano/single/articleFullText.htm?publicId=2190-4286-7-187
- Добавил в систему: Шляхтин Олег Александрович