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Analysis of the Distribution of Relaxation Times (DRT) Responses of Li-Ion Cells as a Function of Their Preparation Conditionsстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 10 апреля 2024 г.
- Авторы: Semerukhin D.Yu, Kubarkov A.V., Sergeyev V.G., Semenikhin O.A., Antipov E.V.
- Журнал: Electrochimica Acta
- Том: 486
- Год издания: 2024
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Номер статьи: 144092
- DOI: 10.1016/j.electacta.2024.144092
- Аннотация: The distribution of relaxation times (DRT) approach was used to analyze the electrochemical impedance spectraobtained for lithium-ion cells as a function of their state of charge as well as the cell preparation conditions. Thecells were made using LiFePO4 cathodes with PEDOT:PSS binder and Li anodes. The following parameters werevaried: the load of the active mass with LiFePO4, the presence or absence of carbon nanotubes, the presence orabsence of the carbon coating of the current collector, die-pressing of the active mass, as well as artificial degradationof the binder using thermal treatment. The results support the view adopted in the literature that the DRTresponse of Li-ion cells involves 4 main regions attributed to (i) contact resistance between the particles of the activemass or the particles and the current collector; (ii) ionic resistance of the active layer including that of SEI onthe surface of the electrodes; (iii) faradaic resistance of the electrochemical charge transfer at the surface of theactive material, and (iv) solid-state diffusion/transport of Li+ ions in the particles of active material. Moreover,we identified yet another contribution to the DRT spectra related to the ionic conductivity of the binder and electrolytein the active mass of the cathode.
- Добавил в систему: Семенихин Олег Александрович