Impact of lithium bis(fluorosulfonyl)imide (LiFSI) concentration on lithium intercalation into graphite monitored with Step Potential ElectroChemical Spectroscopy (SPECS)
[ 1 ] Instytut Chemii i Elektrochemii Technicznej, Wydział Technologii Chemicznej, Politechnika Poznańska | [ P ] employee
2023
scientific article
english
- Lithium bis(fluorosulfonyl)imide
- Lithium-graphite intercalation
- Step potential electrochemical spectroscopy
- Galvanostatic intermittent titration technique
- Ions diffusion
EN Step Potential Electrochemical Spectroscopy (SPECS) analysis of lithium intercalation into graphite was performed. Four different solutions of lithium bis(fluorosulfonyl)imide (LiFSI) salt in EC:DMC solvent (1:1, v:v) with various concentrations (0.1, 1, 5 and 10 mol L−1) were selected as electrolytes. SPECS allowed for calculating the capacity resulting from lithium intercalation between the graphite layers and the capacity that comes from the adsorption of ions on the outer electrode surface, resistance, as well as the diffusion coefficient. Additionally, to compare the results obtained, the galvanostatic intermittent titration technique (GITT) was performed under the same conditions. However, it turned out that initially, similar diffusion parameters are not identical in their meaning. Hence, SPECS can offer fresh insights into the lithium intercalation process in highly concentrated electrolytic solutions, enhancing existing approaches.
29.06.2023
142796-1 - 142796-9
Article number: 142796
CC BY (attribution alone)
czasopismo hybrydowe
final published version
29.06.2023
in press
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