Aqueous synthesis of Na3-2xSb1-xWxS4-xIx solid-state electrolytes with ultrahigh ionic conductivity

Aqueous synthesis of Na3-2xSb1-xWxS4-xIx solid-state electrolytes with ultrahigh ionic 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 Aqueous synthesis of Na3-2xSb1-xWxS4-xIx solid-state electrolytes with ultrahigh ionic conductivity Chengwei Gao, Yuxin Shao, Chengmiao He, Zipeng Liu, Lanlan Xing, and 10 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7998984/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 Chalcogenide solid-state electrolytes (SSEs) offer advantages of high safety, excellent energy density and low cost for all-solid-state sodium ion batteries. However, the large-scale preparation and applications of SSEs are still limited by both their demanding fabrication conditions and the lack of a deep understanding of chemical degradation mechanism. Here, we develop a stable high-performance SSEs, namely Na2.8Sb0.9W0.1S3.9I0.1 SSEs, through a facial aqueous solution synthesis method. This SSE exhibits an ultra-high room-temperature ionic conductivity of 10.3 mS cm -1 , attributed to the widened ion migration channels after W and I substitution, introduction of sodium vacancies and 3D conduction pathways. Oxygen (instead of water) is found to critically affect the chemical stability of Na2.8Sb0.9W0.1S3.9I0.1 SSEs. Moreover, the SSE-based all-solid-state batteries (ASSBs) demonstrate excellent cycling performance in a full Na3Sn|SSEs|TiS2 battery with capacity retention of 127 mAh g -1 after 1000 cycles at 0.1 A g -1 . This aqueous synthesis strategy provides a pathway towards large-scale fabrication of both chemically stable chalcogenide sodium-ion conductors and cost-effective superior all-solid-state sodium-ion batteries. Physical sciences/Energy science and technology Physical sciences/Energy science and technology/Energy storage/Batteries Physical sciences/Materials science/Materials for energy and catalysis/Batteries Physical sciences/Chemistry/Energy Sodium-ion solid-state electrolyte Aqueous synthesis Na-ion conductivity Air stability All-solid-state batteries Full Text Additional Declarations There is NO Competing Interest. Supplementary Files SupportingInformation.pdf Aqueous synthesis of Na 3-2x Sb 1-x W x S 4-x I x solid-state electrolytes with ultrahigh ionic 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. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. 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Aqueous synthesis, Na-ion conductivity, Air stability, All-solid-state batteries","lastPublishedDoi":"10.21203/rs.3.rs-7998984/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-7998984/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"Chalcogenide solid-state electrolytes (SSEs) offer advantages of high safety, excellent energy density and low cost for all-solid-state sodium ion batteries. However, the large-scale preparation and applications of SSEs are still limited by both their demanding fabrication conditions and the lack of a deep understanding of chemical degradation mechanism. Here, we develop a stable high-performance SSEs, namely Na2.8Sb0.9W0.1S3.9I0.1 SSEs, through a facial aqueous solution synthesis method. This SSE exhibits an ultra-high room-temperature ionic conductivity of 10.3 mS cm\u003csup\u003e-1\u003c/sup\u003e, attributed to the widened ion migration channels after W and I substitution, introduction of sodium vacancies and 3D conduction pathways. Oxygen (instead of water) is found to critically affect the chemical stability of Na2.8Sb0.9W0.1S3.9I0.1 SSEs. Moreover, the SSE-based all-solid-state batteries (ASSBs) demonstrate excellent cycling performance in a full Na3Sn|SSEs|TiS2 battery with capacity retention of 127 mAh g\u003csup\u003e-1\u003c/sup\u003e after 1000 cycles at 0.1 A g\u003csup\u003e-1\u003c/sup\u003e. This aqueous synthesis strategy provides a pathway towards large-scale fabrication of both chemically stable chalcogenide sodium-ion conductors and cost-effective superior all-solid-state sodium-ion batteries.","manuscriptTitle":"Aqueous synthesis of Na3-2xSb1-xWxS4-xIx solid-state electrolytes with ultrahigh ionic conductivity","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-11-25 04:06:17","doi":"10.21203/rs.3.rs-7998984/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"6b6d3344-ed0c-40b9-a9d9-5b2699a16344","owner":[],"postedDate":"November 25th, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[{"id":58019254,"name":"Physical sciences/Energy science and technology"},{"id":58019255,"name":"Physical sciences/Energy science and technology/Energy storage/Batteries"},{"id":58019256,"name":"Physical sciences/Materials science/Materials for energy and catalysis/Batteries"},{"id":58019257,"name":"Physical sciences/Chemistry/Energy"}],"tags":[],"updatedAt":"2025-11-25T04:06:17+00:00","versionOfRecord":[],"versionCreatedAt":"2025-11-25 04:06:17","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-7998984","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-7998984","identity":"rs-7998984","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}