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Herein, we introduce vitamin C\u2010derived, oxygen functionalized carbon dots (VC\u2010CDs) as a novel modulator to aqueous electrolyte. Negatively charged VC\u2010CDs preferentially adsorb on Zn anode, homogenizing electric fields and enabling uniform Zn\n                    <jats:sup>2<\/jats:sup>\n                    <jats:sup>+<\/jats:sup>\n                    deposition, and their coordination with Zn\n                    <jats:sup>2<\/jats:sup>\n                    <jats:sup>+<\/jats:sup>\n                    promotes ion migration, boosting full\u2010cell capacity by 15% at 1 A g\n                    <jats:sup>\u2212<\/jats:sup>\n                    <jats:sup>1<\/jats:sup>\n                    . Accordingly, the Zn||Zn symmetric cells deliver a long\u2010term stable cycling lifespan of 2000\u00a0h, whereas the Zn||Cu asymmetric cells attain an exceptional Coulombic efficiency of 99% across 2000 cycles. Furthermore, the Zn||VO\n                    <jats:sub>2<\/jats:sub>\n                    full cells exhibit remarkable cycling stability, retaining 80% of their initial capacity after 2000 cycles at a current density of 4 A g\n                    <jats:sup>\u2212<\/jats:sup>\n                    <jats:sup>1<\/jats:sup>\n                    . Notably, the practical feasibility of VC\u2010CDs is further corroborated in both Zn||VO\n                    <jats:sub>2<\/jats:sub>\n                    and Zn||I\n                    <jats:sub>2<\/jats:sub>\n                    pouch cells, which highlights their great potential for advancing next\u2010generation aqueous zinc\u2010ion battery technologies.\n                  <\/jats:p>","DOI":"10.1002\/smll.73375","type":"journal-article","created":{"date-parts":[[2026,4,11]],"date-time":"2026-04-11T18:48:11Z","timestamp":1775933291000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Vitamin C\u2010Derived Oxygen\u2010Functionalized Carbon Dots as a Novel Modulator for Regulating Zn\n                    <sup>2+<\/sup>\n                    Deposition and Stabilizing Aqueous Zinc\u2010Ion Batteries"],"prefix":"10.1002","volume":"22","author":[{"given":"Ren","family":"Tian","sequence":"first","affiliation":[{"name":"Shandong Key Laboratory of Advanced Electrochemical Energy Storage Technologies College of New Energy China University of Petroleum (East China)  Qingdao P. 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