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Comparison of fresh and aged lithium iron phosphate cathodes using a tailored electrochemical strain microscopy technique

  • Electrochemical strain microscopy (ESM) is a powerful atomic force microscopy (AFM) mode for the investigation of ion dynamics and activities in energy storage materials. Here we compare the changes in commercial LiFePO4 cathodes due to ageing and its influence on the measured ESM signal. Additionally, the ESM signal dynamics are analysed to generate characteristic time constants of the diffusion process, induced by a dc-voltage pulse, which changes the ionic concentration in the material volume under the AFM tip. The ageing of the cathode is found to be governed by a decrease of the electrochemical activity and the loss of available lithium for cycling, which can be stored in the cathode.

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Metadaten
Author:Matthias Simolka, Hanno Kaess, Kaspar Andreas Friedrich
DOI:https://doi.org/https://doi.org/10.3762/bjnano.11.46
Parent Title (English):Beilstein Journal of Nanotechnology
Publisher:Beilstein-Institut zur Förderung der Chemischen Wissenschaften
Place of publication:Frankfurt am Main
Document Type:Article
Language:English
Year of Completion:2020
Release Date:2021/01/13
GND Keyword:Elektrochemie; Lithium-Eisensulfid-Batterie
Volume:11
First Page:583
Last Page:596
DDC classes:500 Naturwissenschaften und Mathematik / 540 Chemie
Open Access?:frei verfügbar
Relevance:Peer reviewed Publikation in Master Journal Liste (Clarivate)
Licence (German):License LogoVeröffentlichungsvertrag ohne Print-on-Demand