|
ИСТИНА |
Войти в систему Регистрация |
ИСТИНА ЦЭМИ РАН |
||
Titanium-based potassium-ion battery positive electrode with extraordinarily high redox potentialстатья
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: 13 мая 2020 г.
- Авторы: Fedotov Stanislav S., Luchinin Nikita D., Aksyonov Dmitry A., Morozov Anatoly V., Ryazantsev Sergey V., Mattia Gaboardi, Plaisier Jasper R., Stevenson Keith J., Abakumov Artem M., Antipov Evgeny V.
- Журнал: Nature communications
- Том: 11
- Год издания: 2020
- Издательство: Nature Pub. Group
- Местоположение издательства: United Kingdom
- Первая страница: 1
- Последняя страница: 11
- DOI: 10.1038/s41467-020-15244-6
- Аннотация: The rapid progress in mass-market applications of metal-ion batteries intensifies the development of economically feasible electrode materials based on earth-abundant elements. Here, we report on a record-breaking titanium-based positive electrode material, KTiPO4F, exhibiting a superior electrode potential of 3.6 V in a potassium-ion cell, which is extraordinarily high for titanium redox transitions. We hypothesize that such an unexpectedly major boost of the electrode potential benefits from the synergy of the cumulative inductive effect of two anions and charge/vacancy ordering. Carbon-coated electrode materials display no capacity fading when cycled at 5C rate for 100 cycles, which coupled with extremely low energy barriers for potassium-ion migration of 0.2 eV anticipates high-power applications. Our contribution shows that the titanium redox activity traditionally considered as “reducing” can be upshifted to near-4V electrode potentials thus providing a playground to design sustainable and cost-effective titanium-containing positive electrode materials with promising electrochemical characteristics.
- Добавил в систему: Федотов Станислав Сергеевич