A New Ceramic Sr2Fe8O18: Crystal Structure and Analysis of Application on Solid Electrolytes

A New Ceramic Sr2Fe8O18: Crystal Structure and Analysis of Application on Solid Electrolytes | 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 Research Article A New Ceramic Sr2Fe8O18: Crystal Structure and Analysis of Application on Solid Electrolytes Zan Ren, Qingwei Liao, Binglin Kang, Kexuan Liao, Liyin Chen, and 3 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-131868/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 All-solid-state batteries have been expected to overcome the safety problem of present lithium-ion batteries including organic liquid electrolytes. The materials with high ionic conductivity are urgently needed. In this paper, we reported a new ionic crystal Sr 2 Fe 8 O 18 which can be applicated on solid electrolyte. Sr 2 Fe 8 O 18 is a typical p-type semiconductor and shows a layered monoclinic crystal structure. The resistivities of Sr 2 Fe 8 O 18 in the temperature range of 20 ~ 145 °C were above 10 7 Ω•cm. The microstructure of Sr 2 Fe 8 O 18 was flaky, and the size of flaks were 1 µm ~ 5 µm. The E - P curve suggested that it was a ferroelectric semiconductor and had small ferroelectric effect. The dielectric response study (Cole-Cole plot) showed that Sr 2 Fe 8 O 18 had two separated relaxation time, each of which contained a group of relaxation. The ionic conductivity σ of the sample was calculated to be 0.2196 × 10 − 4 S/cm. The conductive mechanism which confirmed by the results of First principle calculation at 300K is mainly sublattice vacancy cation diffusion with self-diffusion coefficient D of 1.794 × 10 − 5 cm 2 /s. Fe ion has two dimensional diffusion path (x and y axial), and Sr ion has on dimensional diffusion path (x axial). The crystal structure of Sr 2 Fe 8 O 18 shows tremendous potential application on the solid electrolyte preparation. Ceramics Oxygen-deficient perovskite Solid electrolyte Crystal structure Ion conductor Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Full Text Due to technical limitations, full-text HTML conversion of this manuscript could not be completed. However, the latest manuscript can be downloaded and accessed as a PDF. 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. 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-131868","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":6762026,"identity":"eaba7926-93c8-4c4a-96e0-50d922e2811e","order_by":0,"name":"Zan Ren","email":"","orcid":"","institution":"Beijing Information Science and Technology University - Jianxiangqiao Campus","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Zan","middleName":"","lastName":"Ren","suffix":""},{"id":6762027,"identity":"b8f0780e-eb75-4966-9838-ec2e911148fd","order_by":1,"name":"Qingwei Liao","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA/ElEQVRIiWNgGAWjYBACPmYQaQAiGNs/fDCwYWCQIKCFDUlLG+OMijQitKBo5zlzmAgt7MwPH7wpuGO34Xhz2wPetvOJ/bObDz5gqLGJxu0wNmPDOQbPkjecOdhuINl2O3HGnWPJBgzH0nIbcPvFTJrH4HCy2Y3EBglDoJaGGzlmEowNh/FoYf8G0XL/YYNEYtu5xPmEtfCAbbEzu8HYJnHgzIHEDURoKQb65XCC/ZnEZsOGimTjjTfSkg0S8PiFn//4xgdv/hy2l2w//vDxHwM72Xk3kg8++FBjg1MLGPAwMCTCFDiCGQn4lEO12MPY9vgUjoJRMApGwcgEAIIFX0OxNYLbAAAAAElFTkSuQmCC","orcid":"","institution":"Beijing Information Science and Technology University","correspondingAuthor":true,"submittingAuthor":false,"prefix":"","firstName":"Qingwei","middleName":"","lastName":"Liao","suffix":""},{"id":6762028,"identity":"5b65e123-c33f-4994-a8e6-3f73d681b164","order_by":2,"name":"Binglin Kang","email":"","orcid":"","institution":"Beijing Information Science and Technology University - Jianxiangqiao Campus","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Binglin","middleName":"","lastName":"Kang","suffix":""},{"id":6762029,"identity":"13e97c55-cbae-4b68-90fb-1b1984c73667","order_by":3,"name":"Kexuan Liao","email":"","orcid":"","institution":"Tongji University","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Kexuan","middleName":"","lastName":"Liao","suffix":""},{"id":6762030,"identity":"495fb1a8-2f9f-49df-81fc-dadae34b3423","order_by":4,"name":"Liyin Chen","email":"","orcid":"","institution":"Harvard University","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Liyin","middleName":"","lastName":"Chen","suffix":""},{"id":6762031,"identity":"95ec92e9-2d16-4bfa-a2d4-4fbb3c1b2960","order_by":5,"name":"Wenxiao Jiang","email":"","orcid":"","institution":"Shenzhen University","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Wenxiao","middleName":"","lastName":"Jiang","suffix":""},{"id":6762032,"identity":"77bb0656-03e3-4368-9676-6cfb804403d3","order_by":6,"name":"Lei Qin","email":"","orcid":"","institution":"Beijing Information Science and Technology","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Lei","middleName":"","lastName":"Qin","suffix":""},{"id":6762033,"identity":"ff61e769-c463-4060-a52c-c88a7524101e","order_by":7,"name":"Likun Wang","email":"","orcid":"","institution":"Beijing Information Science and Technology","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Likun","middleName":"","lastName":"Wang","suffix":""}],"badges":[],"createdAt":"2020-12-18 19:44:26","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-131868/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-131868/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":4458601,"identity":"465e5ac4-0fb7-4c11-9f8f-e6408bf0615c","added_by":"auto","created_at":"2020-12-22 23:53:24","extension":"png","order_by":1,"title":"Figure 1","display":"","copyAsset":false,"role":"figure","size":61147,"visible":true,"origin":"","legend":"(a) The XRD pattern of the Sr2Fe8O18 sample. Fig. 1 (b)~(e) The graphical results of refinement and the detail of crystal structure of Sr2Fe8O18. (b) shows the graphical results of refinement; (c)~(e) show the detail of crystal structure of Sr2Fe8O18: (c) labeled unit cell of Sr2Fe8O18, (d) view of FeO6, (e) view of 2*2*2 supercell in the direction of (010).","description":"","filename":"Onlinefloatimage1.png","url":"https://assets-eu.researchsquare.com/files/rs-131868/v1/7ef2ac6d791f1da59ff2cf82.png"},{"id":4458599,"identity":"65f05605-a295-4c54-8ad5-9e62f8b70894","added_by":"auto","created_at":"2020-12-22 23:53:24","extension":"png","order_by":2,"title":"Figure 2","display":"","copyAsset":false,"role":"figure","size":90877,"visible":true,"origin":"","legend":"The results of First principle calculation and resistivities of Sr2Fe8O18 in the temperature range of room temperature to 435°C. (a) shows the energy optimizing results during the last time of geometry optimization; (b)~(e) shows the final crystal structure after geometry optimization: (b) and (c) FeO4 and Sr in the view of (001) and (010) direction, respectively, (d) and (e) SrO6 and Fe in the view of (100) and (010) direction, respectively; (f) the resistivities of Sr2Fe8O18 in the temperature range of room temperature to 435°C, the inset of (f) shows the resistivities of Sr2Fe8O18 in the temperature range of 20 to 435°C .","description":"","filename":"Onlinefloatimage2.png","url":"https://assets-eu.researchsquare.com/files/rs-131868/v1/5727f3074157623a1cc7d918.png"},{"id":4458678,"identity":"1f184d11-89d1-4615-9886-6bebda87254c","added_by":"auto","created_at":"2020-12-22 23:56:25","extension":"png","order_by":3,"title":"Figure 3","display":"","copyAsset":false,"role":"figure","size":117166,"visible":true,"origin":"","legend":"The SEM photographs of the surfaces of the Sr2Fe8O18 samples.","description":"","filename":"Onlinefloatimage3.png","url":"https://assets-eu.researchsquare.com/files/rs-131868/v1/68a82d349b83cc809f94ee62.png"},{"id":4458529,"identity":"bb055333-379b-4ef1-b43e-8048d0310e82","added_by":"auto","created_at":"2020-12-22 23:50:24","extension":"png","order_by":4,"title":"Figure 4","display":"","copyAsset":false,"role":"figure","size":37873,"visible":true,"origin":"","legend":"The dielectric response of frequency, the Cole-Cole plot and ferroelectric property of Sr2Fe8O18. (a) the dielectric response of frequency (form 40Hz to 110MHz) of Sr2Fe8O18; (b) the Cole-Cole plot from the data of (a); (c) the Polarization Electric field (P-E) hysteresis loops of the Sr2Fe8O18 samples tested at room temperature.","description":"","filename":"Onlinefloatimage4.png","url":"https://assets-eu.researchsquare.com/files/rs-131868/v1/3efa100e8c4c99723d38e990.png"},{"id":4458527,"identity":"24753a6a-f0f1-497a-96ce-897aebe97fc0","added_by":"auto","created_at":"2020-12-22 23:50:24","extension":"png","order_by":5,"title":"Figure 5","display":"","copyAsset":false,"role":"figure","size":36123,"visible":true,"origin":"","legend":"The typical impedance plot obtained at room temperature for a Sr2Fe8O18 sample; (a) Nyquist plot and the fitting curve; (b) equivalent circuit. Rb is the resistance of solid electrolyte; Voigt component composed by Cbi and Rbi is the interface impedance between solid electrolyte and electrode; Voigt component composed by Cbe and Rbe is the interface impedance between solid electrolyte and liquid electrolyte; Re is the resistance of liquid electrolyte; Voigt component composed by Cei, Rei and Zw is the interface impedance between liquid electrolyte and electrode; Zw is the Warburg impedance.","description":"","filename":"Onlinefloatimage5.png","url":"https://assets-eu.researchsquare.com/files/rs-131868/v1/f9034200686da2a877a45765.png"},{"id":4458600,"identity":"dfe4e658-50c4-48bc-beac-121b806f3e6c","added_by":"auto","created_at":"2020-12-22 23:53:24","extension":"png","order_by":6,"title":"Figure 6","display":"","copyAsset":false,"role":"figure","size":58130,"visible":true,"origin":"","legend":"Analysis of application on solid electrolytes for Sr2Fe8O18. (a) VACF (velocity autocorrelation function) curve; (b) Ion diffusion velocity on the (100) direction; (dc) Ion diffusion velocity on the (001) direction; (d) Ion diffusion velocity on (010) direction; (e) Fe ion diffusion path on x direction; (f) Fe ion diffusion path on y direction; (g) Sr ion diffusion path on y direction; (h) we intended to show that Sr ion don’t have any diffusion path on x or z direction.","description":"","filename":"Onlinefloatimage6.png","url":"https://assets-eu.researchsquare.com/files/rs-131868/v1/dc7a96a107335773a82c0692.png"},{"id":13567611,"identity":"64b4b9e1-d639-49c5-b728-24618ef184f0","added_by":"auto","created_at":"2021-09-17 03:33:38","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1640711,"visible":true,"origin":"","legend":"","description":"","filename":"manuscriptJAC.pdf","url":"https://assets-eu.researchsquare.com/files/rs-131868/v1_covered.pdf"},{"id":4458701,"identity":"0a1b2ed9-5009-4eaa-9e93-2e43dcd6ec0a","added_by":"auto","created_at":"2020-12-22 23:59:27","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":2045939,"visible":true,"origin":"","legend":"","description":"","filename":"manuscriptJAC.pdf","url":"https://assets-eu.researchsquare.com/files/rs-131868/v1_stamped.pdf"}],"financialInterests":"","formattedTitle":"A New Ceramic Sr2Fe8O18: Crystal Structure and Analysis of Application on Solid Electrolytes","fulltext":[{"header":"Full Text","content":"Due to technical limitations, full-text HTML conversion of this manuscript could not be completed. However, the latest manuscript can be downloaded and \u003ca href='/article/rs-131868/latest.pdf' target='_blank'\u003e accessed as a PDF.\u003c/a\u003e"}],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":false,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"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},"keywords":"Oxygen-deficient perovskite, Solid electrolyte, Crystal structure, Ion conductor","lastPublishedDoi":"10.21203/rs.3.rs-131868/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-131868/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eAll-solid-state batteries have been expected to overcome the safety problem of present lithium-ion batteries including organic liquid electrolytes. The materials with high ionic conductivity are urgently needed. In this paper, we reported a new ionic crystal Sr\u003csub\u003e2\u003c/sub\u003eFe\u003csub\u003e8\u003c/sub\u003eO\u003csub\u003e18\u003c/sub\u003e which can be applicated on solid electrolyte. Sr\u003csub\u003e2\u003c/sub\u003eFe\u003csub\u003e8\u003c/sub\u003eO\u003csub\u003e18\u003c/sub\u003e is a typical p-type semiconductor and shows a layered monoclinic crystal structure. The resistivities of Sr\u003csub\u003e2\u003c/sub\u003eFe\u003csub\u003e8\u003c/sub\u003eO\u003csub\u003e18\u003c/sub\u003e in the temperature range of 20\u0026thinsp;~\u0026thinsp;145\u0026nbsp;\u0026deg;C were above 10\u003csup\u003e7\u003c/sup\u003e Ω\u0026bull;cm. The microstructure of Sr\u003csub\u003e2\u003c/sub\u003eFe\u003csub\u003e8\u003c/sub\u003eO\u003csub\u003e18\u003c/sub\u003e was flaky, and the size of flaks were 1\u0026nbsp;\u0026micro;m\u0026thinsp;~\u0026thinsp;5\u0026nbsp;\u0026micro;m. The \u003cem\u003eE\u003c/em\u003e- \u003cem\u003eP\u003c/em\u003e curve suggested that it was a ferroelectric semiconductor and had small ferroelectric effect. The dielectric response study (Cole-Cole plot) showed that Sr\u003csub\u003e2\u003c/sub\u003eFe\u003csub\u003e8\u003c/sub\u003eO\u003csub\u003e18\u003c/sub\u003e had two separated relaxation time, each of which contained a group of relaxation. The ionic conductivity σ of the sample was calculated to be 0.2196\u0026thinsp;\u0026times;\u0026thinsp;10\u003csup\u003e\u0026minus;\u0026thinsp;4\u003c/sup\u003e S/cm. The conductive mechanism which confirmed by the results of First principle calculation at 300K is mainly sublattice vacancy cation diffusion with self-diffusion coefficient D of 1.794\u0026thinsp;\u0026times;\u0026thinsp;10\u003csup\u003e\u0026minus;\u0026thinsp;5\u003c/sup\u003ecm\u003csup\u003e2\u003c/sup\u003e/s. Fe ion has two dimensional diffusion path (x and y axial), and Sr ion has on dimensional diffusion path (x axial). The crystal structure of Sr\u003csub\u003e2\u003c/sub\u003eFe\u003csub\u003e8\u003c/sub\u003eO\u003csub\u003e18\u003c/sub\u003e shows tremendous potential application on the solid electrolyte preparation.\u003c/p\u003e","manuscriptTitle":"A New Ceramic Sr2Fe8O18: Crystal Structure and Analysis of Application on Solid Electrolytes","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2020-12-22 23:50:22","doi":"10.21203/rs.3.rs-131868/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":"ac749c54-bcfc-4486-8955-c553c3a74d6b","owner":[],"postedDate":"December 22nd, 2020","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[{"id":1561936,"name":"Ceramics"}],"tags":[],"updatedAt":"2020-12-22T23:50:23+00:00","versionOfRecord":[],"versionCreatedAt":"2020-12-22 23:50:22","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-131868","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-131868","identity":"rs-131868","version":["v1"]},"buildId":"7rjqhiLT3MXkJMwkYKINL","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}