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Electrochemical Analysis of the Mechanism of Potassium-Ion Insertion into K-rich Prussian Blue Materialsстатья
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: 22 апреля 2020 г.
- Авторы: Levin Eduard E., Kokin Aleksandr A., Presnov Denis E., Borzenko Andrei G., Vassiliev Sergey Yu, Nikitina Victoria A., Stevenson Keith J.
- Журнал: ChemElectroChem
- Том: 7
- Номер: 3
- Год издания: 2020
- Издательство: Wiley-VCH Verlag
- Местоположение издательства: Weinheim, Germany, Germany
- Первая страница: 761
- Последняя страница: 769
- DOI: 10.1002/celc.201901919
- Аннотация: The electrochemical insertion patterns of potassium‐rich Prussian blue materials with different compositions and particle sizes were systematically compared which allows deducing correlations on the influence of particle morphology and material structure on the potassium‐ion insertion mechanisms in aqueous solutions. While the structural analysis indicates that no first‐order phase transitions occur for nanosized K‐rich Prussian blue particles upon potassium‐ion (de)insertion, the electrochemical data (galvanostatic charge/discharge, cyclic voltammetry, small‐ and large‐amplitude potential step experiments) suggest other outcomes related to the two‐phase insertion mechanism for all the explored PB samples. However, even in the case when the phase transformation is not accompanied by abrupt changes in the crystal structure, the two‐phase mechanism dominates all the essential practical characteristics of performance of this cathode material, such as hysteresis (overpotential) between charge and discharge steps and the measured diffusivities of potassium‐ions during charge and discharge. The formulism presented herein provides a basis for quantitatively assessing ion insertion and deinsertion parameters unique to Prussian blue analogues.
- Добавил в систему: Левин Эдуард Евгеньевич