pH modulation for high capacity and long cycle life of aqueous zinc-ion batteries with β-MnO2 /3D graphene-carbon nanotube hybrids as cathode

pH modulation for high capacity and long cycle life of aqueous zinc-ion batteries with β-MnO2 /3D graphene-carbon nanotube hybrids as cathode | 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 pH modulation for high capacity and long cycle life of aqueous zinc-ion batteries with β-MnO2 /3D graphene-carbon nanotube hybrids as cathode Duolong Jin, Xiaoping Dong, Jiankai Liu, Qianran Pang, Shenghai Xin, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4478891/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 11 You are reading this latest preprint version Abstract With the continuous development of new energy application technology, there is an increasingly urgent need for the safety and affordability of new energy storage products. In recent years, aqueous zinc-ion batteries based on mild aqueous electrolytes have garnered widespread attention as a potential replacement for traditional lithium-ion batteries. However, the limited capacity and low operating voltage of aqueous zinc-ion batteries restrict their widespread application. For this reason, sulfuric acid was added to the electrolyte, which effectively promotes the two-electron conversion of MnO 2 /Mn 2+ during the discharge process. This enhancement results in the high-voltage segment of the batteries' discharge phase offering a higher reversible specific capacity. The results showed that the batteries with 0.1 M H 2 SO 4 added to the electrolyte had a reversible discharge specific capacity of up to 536.07 mAh·g -1 at a current density of 100 mA·g -1 . The activated batteries exhibited a reversible specific capacity of 85.11 mAh·g -1 even at a high current density of 1 A·g -1 . Furthermore, the capacity retention rate after 1,000 cycles was 88.3%. Moreover, the activation rate of the batteries was faster with the addition of H 2 SO 4 , and the average operating potential increased compared to the batteries without H 2 SO 4 in the electrolyte. This provides an effective solution for the practical application of aqueous zinc-ion batteries in power grids. Aqueous Zinc-ion Battery pH Regulation of Electrolyte Electrochemical Performance Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Editorial decision: Revision requested 18 Jun, 2024 Reviews received at journal 17 Jun, 2024 Reviews received at journal 11 Jun, 2024 Reviewers agreed at journal 08 Jun, 2024 Reviews received at journal 07 Jun, 2024 Reviewers agreed at journal 06 Jun, 2024 Reviewers agreed at journal 06 Jun, 2024 Reviewers invited by journal 06 Jun, 2024 Submission checks completed at journal 28 May, 2024 Editor assigned by journal 28 May, 2024 First submitted to journal 26 May, 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. 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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-4478891","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":312066258,"identity":"f1c49901-c6fb-47db-8660-160b262af49b","order_by":0,"name":"Duolong Jin","email":"","orcid":"","institution":"College of Quality and Technical Supervision of Hebei University","correspondingAuthor":false,"prefix":"","firstName":"Duolong","middleName":"","lastName":"Jin","suffix":""},{"id":312066260,"identity":"a99b3626-f14c-4982-8e26-3dcac7de6395","order_by":1,"name":"Xiaoping 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Battery, pH Regulation of Electrolyte, Electrochemical Performance","lastPublishedDoi":"10.21203/rs.3.rs-4478891/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4478891/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eWith the continuous development of new energy application technology, there is an increasingly urgent need for the safety and affordability of new energy storage products. In recent years, aqueous zinc-ion batteries based on mild aqueous electrolytes have garnered widespread attention as a potential replacement for traditional lithium-ion batteries. However, the limited capacity and low operating voltage of aqueous zinc-ion batteries restrict their widespread application. For this reason, sulfuric acid was added to the electrolyte, which effectively promotes the two-electron conversion of MnO\u003csub\u003e2\u003c/sub\u003e/Mn\u003csup\u003e2+\u003c/sup\u003e during the discharge process. This enhancement results in the high-voltage segment of the batteries' discharge phase offering a higher reversible specific capacity. The results showed that the batteries with 0.1 M H\u003csub\u003e2\u003c/sub\u003eSO\u003csub\u003e4\u003c/sub\u003e added to the electrolyte had a reversible discharge specific capacity of up to 536.07 mAh\u0026middot;g\u003csup\u003e-1\u003c/sup\u003e at a current density of 100 mA\u0026middot;g\u003csup\u003e-1\u003c/sup\u003e. The activated batteries exhibited a reversible specific capacity of 85.11 mAh\u0026middot;g\u003csup\u003e-1\u003c/sup\u003e even at a high current density of 1 A\u0026middot;g\u003csup\u003e-1\u003c/sup\u003e. Furthermore, the capacity retention rate after 1,000 cycles was 88.3%. Moreover, the activation rate of the batteries was faster with the addition of H\u003csub\u003e2\u003c/sub\u003eSO\u003csub\u003e4\u003c/sub\u003e, and the average operating potential increased compared to the batteries without H\u003csub\u003e2\u003c/sub\u003eSO\u003csub\u003e4\u003c/sub\u003e in the electrolyte. 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