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Liquid K/Na Alloy on Metal Oxide-Coated Cu: A Promising Anode for Organic Potassium Batteriesстатья
- Авторы: Shchurik Elena V., Zhidkov Ivan S., Dremova Nadezhda N., Mumyatov Alexander V., Kraevaya Olga A., Troshin Pavel A., Aldoshin Sergey M.
- Журнал: Journal of Physical Chemistry C
- Том: 129
- Номер: 5
- Год издания: 2025
- Издательство: American Chemical Society
- Местоположение издательства: United States
- Первая страница: 2310
- Последняя страница: 2316
- DOI: 10.1021/acs.jpcc.4c05912
- Аннотация: Liquid K/Na alloys represent one of the mostpromising anodes for potassium batteries; however, their practicalapplication is challenged by the poor wettability of the mostcommonly used current collectors with liquid metals. Herein, weaddress this problem by modification of porous copper withuniform and ultrathin oxide coatings (ZnO, Al2O3, SnO2, andTiO2) grown using an atomic layer deposition process. The highlypositive effect of the ZnO coating on the electrode stability wasobserved in symmetrical cells with a K/Na alloy on both sides. Allstudied oxide coatings improved the specific capacity andoperational stability of potassium batteries with organic poly-imide-type cathodes compared to the reference cells fabricatedusing nonmodified porous copper. The best capacity retentioncharacteristics of 90−94% after 100 charge−discharge cycles were obtained using TiO2 and SnO2 coatings, which are believed toundergo redox reactions with K/Na to form MxTiO2 and MxSnO2 interlayers, improving the alloy adhesion to copper. The revealedbenefits of oxide coatings open new opportunities for the rational engineering of K/Na alloy anodes for the emerging types ofpotassium-based electrochemical energy storage devices.
- Добавил в систему: Алдошин Сергей Михайлович