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.
Author: | Matthias Simolka, Hanno Kaess, Kaspar Andreas Friedrich |
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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): | ![]() |