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Small-angle Neutron Scattering Studies of Pore Filling in Carbon Electrodes: Mechanisms Limiting Lithium-Air Battery Capacityстатья
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: 29 мая 2019 г.
- Авторы: Zakharchenko Tatiana K., Avdeev Mikhail V., Sergeev Artem V., Chertovich Alexander V., Ivankov Oleksandr I., Petrenko Viktor I., Shao-Horn Yang, Yashina Lada V., Itkis Daniil M.
- Журнал: Nanoscale
- Том: 11
- Год издания: 2019
- Издательство: RSC Pub.
- Местоположение издательства: Cambridge, England
- Первая страница: 6838
- Последняя страница: 6845
- DOI: 10.1039/c9nr00190e
- Аннотация: Many obstacles impede the development of Li–air batteries for practical applications. In particular, there is lack of understanding of the dynamics of processes occurring in porous air electrodes during discharge, including oxygen transport limitations, pore clogging and electrode passivation by both insulating dis- charge and parasitic reaction products. Here, using small-angle neutron scattering, which provides infor- mation on the whole electrode adequate to electrochemical data, we uncover the mechanisms limiting the Li–O2 porous carbon electrode capacity by analysis of the cathode pore filling in highly and poorly solvating media – dimethyl sulfoxide and acetonitrile. The results obtained allowed us suppose that in both cases the cell death is mainly triggered by blocking of oxygen transport pathways inside carbon black particle agglomerates. Total discharge capacities are, indeed, higher in highly solvating solutions due to a higher discharge intermediate lifetime and longer diffusion distance, which enable Li2O2 for- mation outside the carbon black agglomerates, which are, as we demonstrated, in fact mesocrystals that are confirmed by the appearance of a diffraction peak in scattering curves.
- Добавил в систему: Захарченко Татьяна Константиновна