Characterisation and Modelling of Potassium-ion Batteries

Characterisation and Modelling of Potassium-ion Batteries | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Characterisation and Modelling of Potassium-ion Batteries Shobhan Dhir, John Cattermull, Ben Jagger, Maximilian Schart, and 6 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-3734005/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 31 Aug, 2024 Read the published version in Nature Communications → Version 1 posted You are reading this latest preprint version Abstract Potassium-ion batteries (KIBs) are emerging as a promising alternative technology to lithium-ion batteries (LIBs) due to their significantly reduced dependency on critical minerals. KIBs may also present an opportunity for superior fast-charging compared to LIBs, with significantly faster K-ion electrolyte transport properties already demonstrated. In the absence of a viable K-ion electrolyte, a full-cell KIB rate model in commercial cell formats is required to determine the fast-charging potential for KIBs. However, a thorough and accurate characterisation of the critical electrode material properties determining rate performance---the solid state diffusivity and exchange current density---has not yet been conducted for the leading KIB electrode materials. Here, for the first time, we accurately characterise the effective solid state diffusivities and exchange current densities of the graphite anode and potassium manganese hexacyanoferrate K Mn [Fe(CN) 6 ] (KMF) cathode, through a combination of optimised material design and state-of-the-art analysis. Finally, we present the first Doyle-Fuller-Newman model of a KIB full cell in a hypothetical commercial cylindrical cell format, identifying the critical materials properties that limit their rate capability. Physical sciences/Chemistry/Electrochemistry/Batteries Physical sciences/Chemistry/Electrochemistry Physical sciences/Materials science/Materials for energy and catalysis/Batteries Physical sciences/Energy science and technology/Energy storage/Batteries Full Text Additional Declarations Yes there is potential Competing Interest. M.P. is a scientific advisor to Project K Energy. The remaining authors declare no competing interests. Supplementary Files SI.pdf Cite Share Download PDF Status: Published Journal Publication published 31 Aug, 2024 Read the published version in Nature Communications → Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-3734005","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":259154560,"identity":"0e83b808-24bb-445a-a8a3-ff5c03eba11a","order_by":0,"name":"Shobhan Dhir","email":"","orcid":"https://orcid.org/0000-0002-2591-2319","institution":"University of Oxford","correspondingAuthor":false,"prefix":"","firstName":"Shobhan","middleName":"","lastName":"Dhir","suffix":""},{"id":259154561,"identity":"fdfcc3e5-ebbc-438c-b6f4-87b8fa65801f","order_by":1,"name":"John Cattermull","email":"","orcid":"","institution":"University of 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