Fundamental investigations on the ionic transport and thermodynamic properties of non-aqueous potassium-ion electrolytes
Abstract Non-aqueous potassium-ion batteries (KIBs) represent a promising complementary technology to lithium-ion batteries due to the availability and low cost of potassium. Moreover, the lower charge density of K+ compared to Li+ favours the ion-transport properties in liquid electrolyte solutions...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-06-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-023-39523-0 |
| _version_ | 1797789734542508032 |
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| author | Shobhan Dhir Ben Jagger Alen Maguire Mauro Pasta |
| author_facet | Shobhan Dhir Ben Jagger Alen Maguire Mauro Pasta |
| author_sort | Shobhan Dhir |
| collection | DOAJ |
| description | Abstract Non-aqueous potassium-ion batteries (KIBs) represent a promising complementary technology to lithium-ion batteries due to the availability and low cost of potassium. Moreover, the lower charge density of K+ compared to Li+ favours the ion-transport properties in liquid electrolyte solutions, thus, making KIBs potentially capable of improved rate capability and low-temperature performance. However, a comprehensive study of the ionic transport and thermodynamic properties of non-aqueous K-ion electrolyte solutions is not available. Here we report the full characterisation of the ionic transport and thermodynamic properties of a model non-aqueous K-ion electrolyte solution system comprising potassium bis(fluorosulfonyl)imide (KFSI) salt and 1,2-dimethoxyethane (DME) solvent and compare it with its Li-ion equivalent (i.e., LiFSI:DME), over the concentration range 0.25–2 molal. Using tailored K metal electrodes, we demonstrate that KFSI:DME electrolyte solutions show higher salt diffusion coefficients and cation transference numbers than LiFSI:DME solutions. Finally, via Doyle-Fuller-Newman (DFN) simulations, we investigate the K-ion and Li-ion storage properties for K∣∣graphite and Li∣∣graphite cells. |
| first_indexed | 2024-03-13T01:54:53Z |
| format | Article |
| id | doaj.art-d809cda8da184d7794f6d135a7873747 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-03-13T01:54:53Z |
| publishDate | 2023-06-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-d809cda8da184d7794f6d135a78737472023-07-02T11:19:56ZengNature PortfolioNature Communications2041-17232023-06-0114111210.1038/s41467-023-39523-0Fundamental investigations on the ionic transport and thermodynamic properties of non-aqueous potassium-ion electrolytesShobhan Dhir0Ben Jagger1Alen Maguire2Mauro Pasta3Department of Materials, University of OxfordDepartment of Materials, University of OxfordDepartment of Materials, University of OxfordDepartment of Materials, University of OxfordAbstract Non-aqueous potassium-ion batteries (KIBs) represent a promising complementary technology to lithium-ion batteries due to the availability and low cost of potassium. Moreover, the lower charge density of K+ compared to Li+ favours the ion-transport properties in liquid electrolyte solutions, thus, making KIBs potentially capable of improved rate capability and low-temperature performance. However, a comprehensive study of the ionic transport and thermodynamic properties of non-aqueous K-ion electrolyte solutions is not available. Here we report the full characterisation of the ionic transport and thermodynamic properties of a model non-aqueous K-ion electrolyte solution system comprising potassium bis(fluorosulfonyl)imide (KFSI) salt and 1,2-dimethoxyethane (DME) solvent and compare it with its Li-ion equivalent (i.e., LiFSI:DME), over the concentration range 0.25–2 molal. Using tailored K metal electrodes, we demonstrate that KFSI:DME electrolyte solutions show higher salt diffusion coefficients and cation transference numbers than LiFSI:DME solutions. Finally, via Doyle-Fuller-Newman (DFN) simulations, we investigate the K-ion and Li-ion storage properties for K∣∣graphite and Li∣∣graphite cells.https://doi.org/10.1038/s41467-023-39523-0 |
| spellingShingle | Shobhan Dhir Ben Jagger Alen Maguire Mauro Pasta Fundamental investigations on the ionic transport and thermodynamic properties of non-aqueous potassium-ion electrolytes Nature Communications |
| title | Fundamental investigations on the ionic transport and thermodynamic properties of non-aqueous potassium-ion electrolytes |
| title_full | Fundamental investigations on the ionic transport and thermodynamic properties of non-aqueous potassium-ion electrolytes |
| title_fullStr | Fundamental investigations on the ionic transport and thermodynamic properties of non-aqueous potassium-ion electrolytes |
| title_full_unstemmed | Fundamental investigations on the ionic transport and thermodynamic properties of non-aqueous potassium-ion electrolytes |
| title_short | Fundamental investigations on the ionic transport and thermodynamic properties of non-aqueous potassium-ion electrolytes |
| title_sort | fundamental investigations on the ionic transport and thermodynamic properties of non aqueous potassium ion electrolytes |
| url | https://doi.org/10.1038/s41467-023-39523-0 |
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