Carbonate-Anion Engineering Enables Humidity-Resistant Halide Solid Electrolytes with Superionic Conductivity

Carbonate-Anion Engineering Enables Humidity-Resistant Halide Solid Electrolytes with Superionic Conductivity | 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 Carbonate-Anion Engineering Enables Humidity-Resistant Halide Solid Electrolytes with Superionic Conductivity Fuqiang Huang, Jiacong Li, Yuge Cao, Pushun Lu, Kehao Tao, Wujie Dong, and 4 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7842363/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract The commercialization of all-solid-state batteries (ASSBs) is hindered by the lack of a solid electrolyte (SE) that simultaneously delivers high ionic conductivity, resilience to humidity, and efficient low-temperature operation. Herein, we propose a novel strategy of incorporating CO₃²⁻ into halide-based electrolytes, effectively decoupling the inherent trade-off between ionic transport and environmental stability. The CO₃²⁻ group serves a dual function: it forms a rigid, hydrolysis-resistant scaffold via non-hydrolysable metal-carbonate bonds, while its high polarizability and charge delocalization soften local phonon modes, significantly reducing the activation energy for Li⁺ migration. Ta-based SE achieves an ionic conductivity of 7.1 mS cm⁻¹ at 25 °C, ranking among the highest for amorphous SEs; Zr-based SE retains 80% of its conductivity after direct exposure to humid air (20% RH, 2 h), outperforming commercial sulfide and halide counterparts. ASSBs employing these SEs demonstrate ultralong cycling stability (>1,000 cycles with 90% capacity retention at 25 °C) and unprecedented low-temperature performance, operating effectively down to -60 °C. This work establishes a generalizable design principle for next-generation SEs that unify high conductivity, stability, and practicality. Physical sciences/Energy science and technology/Energy storage/Batteries Physical sciences/Chemistry/Energy Full Text Additional Declarations There is NO Competing Interest. Supplementary Files Supportinginformation.docx Supplementary Information for Carbonate-Anion Engineering Enables Humidity-Resistant Halide Solid Electrolytes with Superionic Conductivity Cite Share Download PDF Status: Posted 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. 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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-7842363","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":538896094,"identity":"1685bf52-309e-4a0b-9a06-faccb8715e6b","order_by":0,"name":"Fuqiang 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