Controllable Preparation of Hydrangea Shaped CoAl-LDHs@CoF2 Composite for Supercapacitor Electrode with Superior Performance

Controllable Preparation of Hydrangea Shaped CoAl-LDHs@CoF2 Composite for Supercapacitor Electrode with Superior Performance | 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 Controllable Preparation of Hydrangea Shaped CoAl-LDHs@CoF2 Composite for Supercapacitor Electrode with Superior Performance Xue Bai, Fengyi Sun, LiYan Ma, Jyunhong Shen, Zhuwu Jiang, Dongdong Xu, and 3 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-3847644/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 15 Apr, 2024 Read the published version in Ionics → Version 1 posted 9 You are reading this latest preprint version Abstract Exploring the method for rational design hierarchical structures such as hollow, sphere and core-shell structure is a crucial challenge for enhancing electrochemical performance of supercapacitor electrodes. In this study, we demonstrate a facile method for controllable preparation of hydrangea shaped CoAl-LDHs@CoF 2 composite and used as positive electrode for supercapacitor. A series of contrast tests are performed to select optimal experiment condition. CoAl-LDHs obtained at metal ratio of 2:1, reacting 8 h with addition of NH 4 F, displays optimal performance associated with the hierarchical structure, where NH 4 F plays a vital role in regulating this uniform generation process. The fabricated working electrode shows high specific capacitance of 827.8 Fg − 1 , with excellent capacitance retention of 62.8% after current density increases ten times. At last, an asymmetric supercapacitor using C2A1-8h sample as positive electrode and activated carbon as negative electrode, is assembled and delivers an outstanding energy density of 53.7 Wh kg − 1 at power density of 239.9 kW kg − 1 , and energy density reaches 27.8 Wh kg − 1 at maximum power density of 12000 W kg − 1 , indicating C2A1-8h is a potential candidate for energy storage and conversion systems. Full Text Additional Declarations No competing interests reported. Supplementary Files SupportingInformation.doc Cite Share Download PDF Status: Published Journal Publication published 15 Apr, 2024 Read the published version in Ionics → Version 1 posted Editorial decision: Revision requested 06 Feb, 2024 Reviews received at journal 06 Feb, 2024 Reviewers agreed at journal 26 Jan, 2024 Reviews received at journal 25 Jan, 2024 Reviewers agreed at journal 20 Jan, 2024 Reviewers invited by journal 16 Jan, 2024 Editor assigned by journal 10 Jan, 2024 Submission checks completed at journal 10 Jan, 2024 First submitted to journal 09 Jan, 2024 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-3847644","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":266471043,"identity":"9dc0d893-4d3f-4687-a2b6-974309355bd3","order_by":0,"name":"Xue Bai","email":"","orcid":"","institution":"Fujian University of Technology","correspondingAuthor":false,"prefix":"","firstName":"Xue","middleName":"","lastName":"Bai","suffix":""},{"id":266471044,"identity":"d996e395-ae93-48ee-9481-95fea72e1096","order_by":1,"name":"Fengyi Sun","email":"","orcid":"","institution":"Fujian University of 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In this study, we demonstrate a facile method for controllable preparation of hydrangea shaped CoAl-LDHs@CoF\u003csub\u003e2\u003c/sub\u003e composite and used as positive electrode for supercapacitor. A series of contrast tests are performed to select optimal experiment condition. CoAl-LDHs obtained at metal ratio of 2:1, reacting 8 h with addition of NH\u003csub\u003e4\u003c/sub\u003eF, displays optimal performance associated with the hierarchical structure, where NH\u003csub\u003e4\u003c/sub\u003eF plays a vital role in regulating this uniform generation process. The fabricated working electrode shows high specific capacitance of 827.8 Fg\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e, with excellent capacitance retention of 62.8% after current density increases ten times. At last, an asymmetric supercapacitor using C2A1-8h sample as positive electrode and activated carbon as negative electrode, is assembled and delivers an outstanding energy density of 53.7 Wh kg\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e at power density of 239.9 kW kg\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e, and energy density reaches 27.8 Wh kg\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e at maximum power density of 12000 W kg\u003csup\u003e\u0026minus;\u0026thinsp;1\u003c/sup\u003e, indicating C2A1-8h is a potential candidate for energy storage and conversion systems.\u003c/p\u003e","manuscriptTitle":"Controllable Preparation of Hydrangea Shaped CoAl-LDHs@CoF2 Composite for Supercapacitor Electrode with Superior Performance","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-01-12 16:49:29","doi":"10.21203/rs.3.rs-3847644/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"decision","content":"Revision requested","date":"2024-02-06T15:29:44+00:00","index":"","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2024-02-06T07:41:08+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"b5807067-22ae-46fc-a88d-103d1b580ffa","date":"2024-01-26T10:35:52+00:00","index":"hide","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2024-01-25T12:05:58+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"57a96649-3306-4c6e-b52c-502fe3097f6e","date":"2024-01-20T08:06:51+00:00","index":"hide","fulltext":""},{"type":"reviewersInvited","content":"","date":"2024-01-16T20:21:10+00:00","index":"","fulltext":""},{"type":"editorAssigned","content":"","date":"2024-01-10T13:00:25+00:00","index":"","fulltext":""},{"type":"checksComplete","content":"","date":"2024-01-10T13:00:25+00:00","index":"","fulltext":""},{"type":"submitted","content":"Ionics","date":"2024-01-09T08:10:13+00:00","index":"","fulltext":""}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"ionics","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"","sideBox":" Learn more about [Ionics](https://www.springer.com/journal/11581) ","snPcode":"11581","submissionUrl":"https://mc.manuscriptcentral.com/ionics","title":"Ionics","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"stoa","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false}}],"origin":"","ownerIdentity":"cc04c71f-2234-42b6-bafd-8e3d05f524af","owner":[],"postedDate":"January 12th, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"published-in-journal","subjectAreas":[],"tags":[],"updatedAt":"2024-07-04T09:24:32+00:00","versionOfRecord":{"articleIdentity":"rs-3847644","link":"https://doi.org/10.1007/s11581-024-05520-6","journal":{"identity":"ionics","isVorOnly":false,"title":"Ionics"},"publishedOn":"2024-04-15 09:24:32","publishedOnDateReadable":"April 15th, 2024"},"versionCreatedAt":"2024-01-12 16:49:29","video":"","vorDoi":"10.1007/s11581-024-05520-6","vorDoiUrl":"https://doi.org/10.1007/s11581-024-05520-6","workflowStages":[]},"version":"v1","identity":"rs-3847644","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-3847644","identity":"rs-3847644","version":["v1"]},"buildId":"qtupq5eGEP_6zYnWcrvyt","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}