Journal article
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, 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.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 2.4MB, Terms of use)
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- Publisher copy:
- 10.1038/s41467-023-39523-0
Authors
+ RCUK | Engineering and Physical Sciences Research Council (EPSRC)
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- Grant:
- FITG-FUSE-102
- Publisher:
- Springer Nature
- Journal:
- Nature Communications More from this journal
- Volume:
- 14
- Issue:
- 1
- Article number:
- 3833
- Place of publication:
- England
- Publication date:
- 2023-06-28
- Acceptance date:
- 2023-06-15
- DOI:
- EISSN:
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2041-1723
- Pmid:
-
37380671
- Language:
-
English
- Keywords:
- Subjects:
- Pubs id:
-
1489535
- Local pid:
-
pubs:1489535
- Deposit date:
-
2023-08-14
- ARK identifier:
Terms of use
- Copyright holder:
- Dhir et al.
- Copyright date:
- 2023
- Rights statement:
- © The Author(s) 2023. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
- Licence:
- CC Attribution (CC BY)
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