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The role of glass crystallization processes in preparation of high Li-conductive NASICON-type ceramicsстатья
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: 15 августа 2019 г.
- Авторы: Vizgalov Victor A., Nestler Tina, Vyalikh Anastasia, Bobrikov Ivan A., Ivankov Oleksandr I., Petrenko Viktor, Avdeev Mikhail V., Yashina Lada V., Itkis Daniil M.
- Журнал: CrystEngComm
- Том: 21
- Номер: 19
- Год издания: 2019
- Издательство: Royal Society of Chemistry
- Местоположение издательства: United Kingdom
- Первая страница: 3106
- Последняя страница: 3115
- DOI: 10.1039/c9ce00386j
- Аннотация: One of the approaches to tackle the problem of limited electrolyte electrochemical stability, which controls the development of novel electrochemical storage devices, is the use of solid electrolytes. Here, we focus on one of the most promising among oxide-based glass-ceramic materials, Li1+xAlxGe2−xP3O12, to investi- gate the physical and chemical mechanisms that govern the enhancement of Li-conductivity upon varia- tion of its composition and glass crystallization conditions during a two-step heat treatment. Using X-ray and neutron diffraction, small-angle neutron scattering and Raman spectroscopy we found that the addi- tion of 6–18 mol% yttria makes the polyphosphate chains in glass more thermally stable. This leads to sud- den and uniform glass crystallization over the whole volume. This peculiar glass structure governs the fur- ther crystallization behavior and ensures the optimal organization of intergrain boundaries. The highest Li- conductivity is achieved for a sample with 12 mol% yttria annealed for 2 hours at 750 °C. In addition, nu- clear magnetic resonance together with bond valence sum analysis provides further insight into atomistic mechanisms of ionic conductivity in NASICON-based lithium-conductive ceramics.
- Добавил в систему: Яшина Лада Валерьевна