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The Misconception of Mg2+ Insertion into Prussian Blue Analog Structures from Aqueous Solutionстатья
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: 9 апреля 2021 г.
- Авторы: Komayko Alena I., Ryazantsev Sergey V., Trussov Ivan A., Arkharova Natalya A., Presnov Denis E., Levin Eduard E., Nikitina Victoria A.
- Журнал: ChemSusChem
- Том: 14
- Номер: 6
- Год издания: 2021
- Издательство: Wiley - V C H Verlag GmbbH & Co.
- Местоположение издательства: Germany
- Первая страница: 1574
- Последняя страница: 1585
- Номер статьи: cssc.202002916
- DOI: 10.1002/cssc.202002916
- Аннотация: Prussian Blue analogs (PBA) are commonly believed to reversibly insert divalent ions, such as calcium and magnesium, rendering them as perspective cathode materials for aqueous magnesium‐ion batteries. In this work, we show that Mg 2+ insertion into nanosized PBA materials is a misconception and provide conclusive evidence for the unfeasibility of this process for both cation‐rich and cation‐poor nickel, iron and copper hexacyanoferrates. Based on structural, electrochemical, IR spectroscopy and quartz crystal microbalance data, we deduce the charge compensation of PBA redox by protons rather than by divalent ions in aqueous Mg 2+ solution. The reversible insertion of protons involves complex lattice water rearrangements, while the presence of Mg 2+ ion and Mg salt anion stabilizes the proton (de)insertion reaction due to local pH effects and anion adsorption at the PBA surface. The obtained results draw attention to the design of proton‐based batteries operating in environmentally benign aqueous solutions with low acidity.
- Добавил в систему: Левин Эдуард Евгеньевич