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Enhancing Na+ Extraction Limit through High Voltage Activation of the NASICON-Type Na4MnV(PO4)3 Cathodeстатья
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: 21 мая 2019 г.
- Авторы: Zakharkin Maxim V., Drozhzhin Oleg A., Tereshchenko Ivan V., Chernyshov Dmitry, Abakumov Artem M., Antipov Evgeny V., Stevenson Keith J.
- Журнал: ACS Applied Energy Materials
- Том: 1
- Номер: 11
- Год издания: 2018
- Издательство: American Chemical Society
- Местоположение издательства: United States
- Первая страница: 5842
- Последняя страница: 5846
- DOI: 10.1021/acsaem.8b01269
- Аннотация: Sodium (de)intercalation in the Na4MnV(PO4)3 NASICON-type cathode has been studied with operando synchrotron X-ray powder diffraction and galvanostatic cycling up to 3.8 and 4.0 V cutoff voltages. Symmetry reduction from rhombohedral to monoclinic was observed immediately after the start of the electrochemical desodiation, with restoring of the rhombohedral phase at 3.8 V. Cycling within the 2.5–3.8 V potential range proceeds through both solid-solution and two-phase processes. An additional voltage plateau at ∼3.9 V is observed, associated with “unlocking” of the Na1 site in the rhombohedral phase. Reverse insertion of Na+ cations proceeds via the entire solid-solution region. The experimentally observed discharge capacity increases by ≈14% after raising cutoff voltage.
- Добавил в систему: Захаркин Максим Валерьевич