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

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ID: 104462
2020
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Abstract
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 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.
Reference Key
simolka2020comparisonbeilstein Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Simolka, Matthias;Kaess, Hanno;Friedrich, Kaspar Andreas;
Journal beilstein journal of nanotechnology
Year 2020
DOI
10.3762/bjnano.11.46
URL
Keywords
activity ageing cathode lifepo4 electrochemical strain microscopy (esm)

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