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A New Technique for In Situ Determination of the Active Surface Area Changes of Li–Ion Battery Electrodes

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cris.lastimport.scopus2024-02-12T20:04:32Z
dc.abstract.enLi-ion batteries are of a great interest for over three decades. A geometric electrode surface area is generally used for Li-ion electrochemical parameters calculations. Since the real electrode is a complex system composed of the thick porous structure, the contact surface area between the active mass and electrolyte is far larger than ometrical. This approximation leads to a large deviation of obtained results, especially within different laboratories and for volume and surface changing materials – e.g. silicon. The article presents a new method of in-situ analysis of active surface area variations applicable for Li-ion electrodes. The method relies on the electrochemical impedance ectroscopy measurement (EIS) performed at an arbitrarily chosen state of charge during superimposed DC current flow. The correlation between a local ion concentration with a charge transfer resistance allows to evaluate the ifferences of the active surface area. The presented method is not affected by the SEI layer presence, the material composition nor the lithiation mechanism. Due to limited EIS frequency range the presented method can be performed with a relatively short time. Our new in-situ surface area determination can greatly improve the accuracy of the electrochemical parameters evaluation and enable the proper result analysis. We believe that our method can become a standard procedure implemented in every research focusing on the electrochemical parameter termination of the volume changing active materials.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorBoczar, Maciej
dc.contributor.authorKrajewski, Michał
dc.contributor.authorRatyński, Maciej
dc.contributor.authorBuchberger, Dominika
dc.contributor.authorHamankiewicz, Bartosz
dc.contributor.authorCzerwiński, Andrzej
dc.date.accessioned2024-01-24T18:04:16Z
dc.date.available2024-01-24T18:04:16Z
dc.date.issued2020
dc.description.financeŚrodki finansowe przyznane na realizację projektu w zakresie badań naukowych lub prac rozwojowych
dc.description.number10
dc.description.volume3
dc.identifier.doi10.1002/BATT.202000088
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/101727
dc.identifier.weblinkhttps://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fbatt.202000088
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofBatteries & Supercaps
dc.relation.pages1028-1039
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enLi-ion
dc.subject.ensurface area
dc.subject.enimpedance
dc.subject.ensilicon
dc.subject.enelectrode
dc.subject.envolume change
dc.titleA New Technique for In Situ Determination of the Active Surface Area Changes of Li–Ion Battery Electrodes
dc.typeJournalArticle
dspace.entity.typePublication