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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 LiFePO(4) cathodes due to ageing and its influence on the measured ESM signal. Addition...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Beilstein-Institut
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7155899/ https://www.ncbi.nlm.nih.gov/pubmed/32318319 http://dx.doi.org/10.3762/bjnano.11.46 |
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author | Simolka, Matthias Kaess, Hanno Friedrich, Kaspar Andreas |
author_facet | Simolka, Matthias Kaess, Hanno Friedrich, Kaspar Andreas |
author_sort | Simolka, Matthias |
collection | PubMed |
description | 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 LiFePO(4) 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. |
format | Online Article Text |
id | pubmed-7155899 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Beilstein-Institut |
record_format | MEDLINE/PubMed |
spelling | pubmed-71558992020-04-21 Comparison of fresh and aged lithium iron phosphate cathodes using a tailored electrochemical strain microscopy technique Simolka, Matthias Kaess, Hanno Friedrich, Kaspar Andreas Beilstein J Nanotechnol Full Research Paper 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 LiFePO(4) 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. Beilstein-Institut 2020-04-07 /pmc/articles/PMC7155899/ /pubmed/32318319 http://dx.doi.org/10.3762/bjnano.11.46 Text en Copyright © 2020, Simolka et al. https://creativecommons.org/licenses/by/4.0https://www.beilstein-journals.org/bjnano/termsThis is an Open Access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0). Please note that the reuse, redistribution and reproduction in particular requires that the authors and source are credited. The license is subject to the Beilstein Journal of Nanotechnology terms and conditions: (https://www.beilstein-journals.org/bjnano/terms) |
spellingShingle | Full Research Paper Simolka, Matthias Kaess, Hanno Friedrich, Kaspar Andreas Comparison of fresh and aged lithium iron phosphate cathodes using a tailored electrochemical strain microscopy technique |
title | Comparison of fresh and aged lithium iron phosphate cathodes using a tailored electrochemical strain microscopy technique |
title_full | Comparison of fresh and aged lithium iron phosphate cathodes using a tailored electrochemical strain microscopy technique |
title_fullStr | Comparison of fresh and aged lithium iron phosphate cathodes using a tailored electrochemical strain microscopy technique |
title_full_unstemmed | Comparison of fresh and aged lithium iron phosphate cathodes using a tailored electrochemical strain microscopy technique |
title_short | Comparison of fresh and aged lithium iron phosphate cathodes using a tailored electrochemical strain microscopy technique |
title_sort | comparison of fresh and aged lithium iron phosphate cathodes using a tailored electrochemical strain microscopy technique |
topic | Full Research Paper |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7155899/ https://www.ncbi.nlm.nih.gov/pubmed/32318319 http://dx.doi.org/10.3762/bjnano.11.46 |
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