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To address these limitations, a supercritical solvothermal strategy is developed for the rapid fabrication of a high\u2010performance spinel\u2010structured ZnV\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>4<\/jats:sub>\n                    \/porous carbon (ZnV\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>4<\/jats:sub>\n                    \/PRC) composite. Benefiting from the excellent mass transfer and heat transfer characteristics and mild reducing capability of supercritical ethanol, this approach effectively suppresses the formation of hydrated zinc vanadate phases, thereby significantly shortening the reaction time required for ZnV\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>4<\/jats:sub>\n                    formation. Meanwhile, the introduction of a porous carbon (PRC) framework provides efficient electrolyte penetration pathways, reduces the interparticle diffusion resistance of Zn\n                    <jats:sup>2+<\/jats:sup>\n                    ions, and minimizes the direct contact between ZnV\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>4<\/jats:sub>\n                    and the electrolyte. As a result, the electronic conductivity of the composite is substantially enhanced, Zn\n                    <jats:sup>2+<\/jats:sup>\n                    transport kinetics are accelerated, and vanadium dissolution is significantly mitigated. Owing to these combined advantages, the ZnV\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>4<\/jats:sub>\n                    \/PRC cathode delivers a high reversible capacity of 470 mAh g\n                    <jats:sup>\u22121<\/jats:sup>\n                    at 0.1 A g\n                    <jats:sup>\u22121<\/jats:sup>\n                    and retains 172 mAh g\n                    <jats:sup>\u22121<\/jats:sup>\n                    after 5000 cycles at a high current density of 10 A g\n                    <jats:sup>\u22121<\/jats:sup>\n                    , demonstrating outstanding long\u2010term cycling stability.\n                  <\/jats:p>","DOI":"10.1002\/smll.76338","type":"journal-article","created":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T19:45:25Z","timestamp":1792698325000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Supercritical Solvothermal Synthesis of Spinel ZnV\n                    <sub>2<\/sub>\n                    O\n                    <sub>4<\/sub>\n                    \/Porous Carbon Composite Cathodes for Aqueous Zinc\u2010Ion Batteries"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0009-0007-5574-5850","authenticated-orcid":false,"given":"Zhangmin","family":"Yu","sequence":"first","affiliation":[{"name":"R&amp;D Institute of Fluid and Powder Engineering Dalian University of Technology  Dalian China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wei","family":"Wei","sequence":"additional","affiliation":[{"name":"R&amp;D Institute of Fluid and Powder Engineering Dalian University of Technology  Dalian China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhiyi","family":"Li","sequence":"additional","affiliation":[{"name":"R&amp;D Institute of Fluid and Powder Engineering Dalian University of Technology  Dalian 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