Insights into the transport and thermodynamic properties of a bis(fluorosulfonyl)imide-based ionic liquid electrolyte for battery applications
Ionic liquid electrolytes (ILEs) have become popular in various advanced Li-ion battery chemistries because of their high electrochemical and thermal stability and low volatility. However, because of their relatively high viscosity and poor Li+ diffusion, it is thought large concentration gradients...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
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American Chemical Society
2022
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| _version_ | 1826307662516584448 |
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| author | Fawdon, J Rees, GJ La Mantia, F Pasta, M |
| author_facet | Fawdon, J Rees, GJ La Mantia, F Pasta, M |
| author_sort | Fawdon, J |
| collection | OXFORD |
| description | Ionic liquid electrolytes (ILEs) have become popular in various advanced Li-ion battery chemistries because of their high electrochemical and thermal stability and low volatility. However, because of their relatively high viscosity and poor Li+ diffusion, it is thought large concentration gradients form, reducing their rate capability. Herein, we utilize operando Raman microspectroscopy to visualize ILE concentration gradients for the first time. Specifically, using lithium bis(fluorosulfonyl)imide (LiFSI) in N-propyl-N-methylpyrrolidinium FSI, its “apparent” diffusion coefficient, lithium transference number, thermodynamic factor, ionic conductivity, and resistance of charge transfer against lithium metal were isolated. Furthermore, the analysis of these concentration gradients led to insights into the bulk structure of ILEs, which we propose are composed of large, ordered aggregates. |
| first_indexed | 2024-03-07T07:06:31Z |
| format | Journal article |
| id | oxford-uuid:a7332bb3-51bb-4090-b628-3a754e76bf77 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T07:06:31Z |
| publishDate | 2022 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | oxford-uuid:a7332bb3-51bb-4090-b628-3a754e76bf772022-05-13T11:03:30ZInsights into the transport and thermodynamic properties of a bis(fluorosulfonyl)imide-based ionic liquid electrolyte for battery applicationsJournal articlehttp://purl.org/coar/resource_type/c_545buuid:a7332bb3-51bb-4090-b628-3a754e76bf77EnglishSymplectic ElementsAmerican Chemical Society2022Fawdon, JRees, GJLa Mantia, FPasta, MIonic liquid electrolytes (ILEs) have become popular in various advanced Li-ion battery chemistries because of their high electrochemical and thermal stability and low volatility. However, because of their relatively high viscosity and poor Li+ diffusion, it is thought large concentration gradients form, reducing their rate capability. Herein, we utilize operando Raman microspectroscopy to visualize ILE concentration gradients for the first time. Specifically, using lithium bis(fluorosulfonyl)imide (LiFSI) in N-propyl-N-methylpyrrolidinium FSI, its “apparent” diffusion coefficient, lithium transference number, thermodynamic factor, ionic conductivity, and resistance of charge transfer against lithium metal were isolated. Furthermore, the analysis of these concentration gradients led to insights into the bulk structure of ILEs, which we propose are composed of large, ordered aggregates. |
| spellingShingle | Fawdon, J Rees, GJ La Mantia, F Pasta, M Insights into the transport and thermodynamic properties of a bis(fluorosulfonyl)imide-based ionic liquid electrolyte for battery applications |
| title | Insights into the transport and thermodynamic properties of a bis(fluorosulfonyl)imide-based ionic liquid electrolyte for battery applications |
| title_full | Insights into the transport and thermodynamic properties of a bis(fluorosulfonyl)imide-based ionic liquid electrolyte for battery applications |
| title_fullStr | Insights into the transport and thermodynamic properties of a bis(fluorosulfonyl)imide-based ionic liquid electrolyte for battery applications |
| title_full_unstemmed | Insights into the transport and thermodynamic properties of a bis(fluorosulfonyl)imide-based ionic liquid electrolyte for battery applications |
| title_short | Insights into the transport and thermodynamic properties of a bis(fluorosulfonyl)imide-based ionic liquid electrolyte for battery applications |
| title_sort | insights into the transport and thermodynamic properties of a bis fluorosulfonyl imide based ionic liquid electrolyte for battery applications |
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