Microwave synthesis of FeNiSb medium-entropy alloy as a high-performance electrode for symmetric supercapacitors

Microwave synthesis of FeNiSb medium-entropy alloy as a high-performance electrode for symmetric supercapacitors | 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 Microwave synthesis of FeNiSb medium-entropy alloy as a high-performance electrode for symmetric supercapacitors Weiwei Zhao, Xue Wang, Shuai Zhang, Shuangyi He, Jujie Luo This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9106466/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 Supercapacitors, due to their unique energy storage mechanism, hold promise for alleviating the energy crisis. Electrode materials play a crucial role in supercapacitors, determining their overall performance. In this study, FeNiSb medium-entropy alloy (MEA) nanoparticles were successfully synthesized on nickel foam (NF) via a one-step microwave method. Benefiting from its unique surface morphology and the characteristic high configurational entropy and elemental synergistic effects of MEA, which collectively lead to superior ion-transport kinetics and abundant active sites, the material exhibited exceptional electrochemical performance. The FeNiSb electrode demonstrated a high specific capacitance of 1487.2 F g − 1 at 1 A g − 1 . Furthermore, a fabricated FeNiSb//FeNiSb symmetric supercapacitor (SSC) achieved an impressive energy density of 97.5 Wh kg − 1 at 750.2 W kg − 1 and superior cycling stability (80% retention after 5000 cycles). This study successfully employed FeNiSb MEA for SSC, demonstrating outstanding electrochemical performance and providing a viable solution for designing advanced energy storage materials. Medium-entropy alloy ⋅ FeNiSb Microwave Symmetric supercapacitor Full Text Additional Declarations No competing interests reported. Supplementary Files SupplementaryMaterial.docx 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-9106466","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":609164471,"identity":"a3856f82-0cd3-4806-8489-4c529fad92e2","order_by":0,"name":"Weiwei Zhao","email":"","orcid":"","institution":"Taiyuan University of Technology","correspondingAuthor":false,"prefix":"","firstName":"Weiwei","middleName":"","lastName":"Zhao","suffix":""},{"id":609164472,"identity":"5947b02a-ed1e-4f19-90a3-99bdfc02e4fc","order_by":1,"name":"Xue Wang","email":"","orcid":"","institution":"Taiyuan University of Technology","correspondingAuthor":false,"prefix":"","firstName":"Xue","middleName":"","lastName":"Wang","suffix":""},{"id":609164473,"identity":"a3cb53ff-fbbc-409a-9405-ffda88779f3f","order_by":2,"name":"Shuai Zhang","email":"","orcid":"","institution":"Taiyuan University of Technology","correspondingAuthor":false,"prefix":"","firstName":"Shuai","middleName":"","lastName":"Zhang","suffix":""},{"id":609164474,"identity":"265c23fe-498b-4668-8edc-774fdf66449f","order_by":3,"name":"Shuangyi He","email":"","orcid":"","institution":"Taiyuan University of Technology","correspondingAuthor":false,"prefix":"","firstName":"Shuangyi","middleName":"","lastName":"He","suffix":""},{"id":609164475,"identity":"7a21ca2f-0409-4d01-aaaa-00011d4b5528","order_by":4,"name":"Jujie Luo","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAuUlEQVRIiWNgGAWjYBACPiA2YOCRYOBnZj74gCgtbDAtku1syQZEawEDg/M8ZgLEaZFIPlDMI2MhZ3yYwYyBocYmmggtaQnGPDwSxmaHGdIeMBxLy20grCXHAKQlcdthhuMGjA2HiddSv7mZsU2CJC0JBszMbERq4XmWYDiHR8JwxmE2ZoMEYvzCz558zOBtT508f//5jw8+1NgQ1gKyyICxB8pMIEI5CDA/YPhBpNJRMApGwSgYmQAAduAx5l1nEmoAAAAASUVORK5CYII=","orcid":"","institution":"Taiyuan University of Technology","correspondingAuthor":true,"prefix":"","firstName":"Jujie","middleName":"","lastName":"Luo","suffix":""}],"badges":[],"createdAt":"2026-03-12 15:24:17","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-9106466/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-9106466/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":106249871,"identity":"ff3558c7-d43e-410e-ad0f-6eaf3d5fe119","added_by":"auto","created_at":"2026-04-06 16:55:43","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1248015,"visible":true,"origin":"","legend":"","description":"","filename":"Manuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-9106466/v1_covered_4ccee0b5-d6be-43f3-8ceb-d6c045074af5.pdf"},{"id":105327268,"identity":"f5907417-345c-45f2-9fa5-5a7a79ce0ef6","added_by":"auto","created_at":"2026-03-24 19:24:27","extension":"docx","order_by":0,"title":"","display":"","copyAsset":false,"role":"supplement","size":200792,"visible":true,"origin":"","legend":"","description":"","filename":"SupplementaryMaterial.docx","url":"https://assets-eu.researchsquare.com/files/rs-9106466/v1/3ba6031462c4320cae9ad1f3.docx"}],"financialInterests":"No competing interests reported.","formattedTitle":"Microwave synthesis of FeNiSb medium-entropy alloy as a high-performance electrode for symmetric supercapacitors","fulltext":[],"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":true,"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":"Medium-entropy alloy ⋅ FeNiSb, Microwave, Symmetric supercapacitor","lastPublishedDoi":"10.21203/rs.3.rs-9106466/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-9106466/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eSupercapacitors, due to their unique energy storage mechanism, hold promise for alleviating the energy crisis. Electrode materials play a crucial role in supercapacitors, determining their overall performance. In this study, FeNiSb medium-entropy alloy (MEA) nanoparticles were successfully synthesized on nickel foam (NF) via a one-step microwave method. Benefiting from its unique surface morphology and the characteristic high configurational entropy and elemental synergistic effects of MEA, which collectively lead to superior ion-transport kinetics and abundant active sites, the material exhibited exceptional electrochemical performance. The FeNiSb electrode demonstrated a high specific capacitance of 1487.2 F g\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e at 1 A g\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e. Furthermore, a fabricated FeNiSb//FeNiSb symmetric supercapacitor (SSC) achieved an impressive energy density of 97.5 Wh kg\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e at 750.2 W kg\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e and superior cycling stability (80% retention after 5000 cycles). This study successfully employed FeNiSb MEA for SSC, demonstrating outstanding electrochemical performance and providing a viable solution for designing advanced energy storage materials.\u003c/p\u003e","manuscriptTitle":"Microwave synthesis of FeNiSb medium-entropy alloy as a high-performance electrode for symmetric supercapacitors","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2026-03-24 19:23:05","doi":"10.21203/rs.3.rs-9106466/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":"0dea4f94-bf34-451d-9c83-576bf9b00329","owner":[],"postedDate":"March 24th, 2026","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2026-04-06T16:54:53+00:00","versionOfRecord":[],"versionCreatedAt":"2026-03-24 19:23:05","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-9106466","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-9106466","identity":"rs-9106466","version":["v1"]},"buildId":"XKTyCvWXoU3ODBz1xrDgd","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}