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Here, we report a high\u2010voltage aqueous FIB system delivering an output voltage of \u223c1.3\u00a0V by coupling a zinc\/zinc hydroxyfluoride (Zn\u2194ZnOHF) anode with an iodine cathode undergoing reversible I\n                    <jats:sup>\u2212<\/jats:sup>\n                    \u2194I\n                    <jats:sub>2<\/jats:sub>\n                    F\n                    <jats:sup>\u2212<\/jats:sup>\n                    interhalogen conversion in an NH\n                    <jats:sub>4<\/jats:sub>\n                    F\u2010based methanol\/water hybrid electrolyte. At the anode, strong complexation between NH\n                    <jats:sub>4<\/jats:sub>\n                    <jats:sup>+<\/jats:sup>\n                    and Zn\n                    <jats:sup>2+<\/jats:sup>\n                    activates a reversible solid\u2010to\u2010solid Zn\u2194ZnOHF conversion. Meanwhile, methanol effectively suppresses HER and accelerates fluoride\u2010ion desolvation, leading to fast kinetics and high reversibility. As a result, the ZnOHF\/Zn anode exhibits remarkable durability for over 1100\u00a0h at 1\u00a0mA cm\n                    <jats:sup>\u22122<\/jats:sup>\n                    and 2\u00a0mAh cm\n                    <jats:sup>\u22122<\/jats:sup>\n                    . At the cathode, tetrahexylammonium iodide (THAI) induces the formation of insoluble THAI\n                    <jats:sub>2<\/jats:sub>\n                    F during the fluorination of I\n                    <jats:sub>2<\/jats:sub>\n                    cathode, effectively immobilizing iodine species and suppressing shuttle effects. The proposed fluoride\u2010ion\u2010shuttled Zn\/I\n                    <jats:sub>2<\/jats:sub>\n                    cells deliver a high specific capacity of 168\u00a0mAh g\n                    <jats:sup>\u22121<\/jats:sup>\n                    at 2\u00a0A g\n                    <jats:sup>\u22121<\/jats:sup>\n                    and retain 81% capacity after 2500 cycles. This work establishes interhalogen chemistry and electrolyte\u2010regulated solid\u2010state fluorination as viable strategies for designing high\u2010voltage, long\u2010life FIBs.\n                  <\/jats:p>","DOI":"10.1002\/anie.7702880","type":"journal-article","created":{"date-parts":[[2026,5,31]],"date-time":"2026-05-31T16:24:02Z","timestamp":1780244642000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Solid\u2010to\u2010Solid Zn Anode and Interhalogen Iodine Cathodes for High\u2010Voltage Fluoride\u2010Ion Batteries"],"prefix":"10.1002","volume":"65","author":[{"given":"Huijian","family":"Wang","sequence":"first","affiliation":[{"name":"State Key Laboratory of Chemo and Biosensing Joint International Research Laboratory of Energy Electrochemistry College of Chemistry and Chemical Engineering Hunan University  Hunan 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Technological Innovation Center State Key Laboratory of Chemical Engineering Institute of Pharmaceutical Engineering College of Chemical and Biological Engineering Zhejiang University  Hangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yingying","family":"Lu","sequence":"additional","affiliation":[{"name":"Zhejiang Key Laboratory of Intelligent Manufacturing for Functional Chemicals ZJU\u2010Hangzhou Global Scientific and Technological Innovation Center State Key Laboratory of Chemical Engineering Institute of Pharmaceutical Engineering College of Chemical and Biological Engineering Zhejiang University  Hangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4074-340X","authenticated-orcid":false,"given":"Xiao","family":"Liang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Chemo and Biosensing Joint International Research Laboratory of Energy Electrochemistry College of 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