Fundamental investigations on the ionic transport and thermodynamic properties of non-aqueous potassium-ion electrolytes
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<sup>+</sup> compared to Li<sup>+</sup> favours the ion-transport prope...
| Glavni autori: | , , , |
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| Format: | Journal article |
| Jezik: | English |
| Izdano: |
Springer Nature
2023
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| Teme: |
| _version_ | 1826311147353014272 |
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| author | Dhir, S Jagger, B Maguire, A Pasta, M |
| author_facet | Dhir, S Jagger, B Maguire, A Pasta, M |
| author_sort | Dhir, S |
| collection | OXFORD |
| description | 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<sup>+</sup> compared to Li<sup>+</sup> 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 | 2024-03-07T08:04:04Z |
| format | Journal article |
| id | oxford-uuid:bad72422-5a8a-4237-9b8d-b33ea2e5b7b2 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T08:04:04Z |
| publishDate | 2023 |
| publisher | Springer Nature |
| record_format | dspace |
| spelling | oxford-uuid:bad72422-5a8a-4237-9b8d-b33ea2e5b7b22023-10-13T15:09:37ZFundamental investigations on the ionic transport and thermodynamic properties of non-aqueous potassium-ion electrolytesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:bad72422-5a8a-4237-9b8d-b33ea2e5b7b2ElectrochemistryThermodynamicsBatteriesMaterials for energy and catalysisEnergy storageEnglishSymplectic ElementsSpringer Nature2023Dhir, SJagger, BMaguire, APasta, MNon-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<sup>+</sup> compared to Li<sup>+</sup> 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. |
| spellingShingle | Electrochemistry Thermodynamics Batteries Materials for energy and catalysis Energy storage Dhir, S Jagger, B Maguire, A Pasta, M Fundamental investigations on the ionic transport and thermodynamic properties of non-aqueous potassium-ion electrolytes |
| 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 |
| topic | Electrochemistry Thermodynamics Batteries Materials for energy and catalysis Energy storage |
| work_keys_str_mv | AT dhirs fundamentalinvestigationsontheionictransportandthermodynamicpropertiesofnonaqueouspotassiumionelectrolytes AT jaggerb fundamentalinvestigationsontheionictransportandthermodynamicpropertiesofnonaqueouspotassiumionelectrolytes AT maguirea fundamentalinvestigationsontheionictransportandthermodynamicpropertiesofnonaqueouspotassiumionelectrolytes AT pastam fundamentalinvestigationsontheionictransportandthermodynamicpropertiesofnonaqueouspotassiumionelectrolytes |