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However, this design often lowers frontier molecular orbital energies, resulting in undesirably high redox potentials (&gt; \u22120.6 V) that compromise cell voltages. Here we propose a dichalcogenide electronegativity engineering by introducing a family of diphenyl dichalcogen compounds (Ph\u20102S, Ph\u20102Se, and Ph\u20102Te) featuring dual sulfide, selenide, telluride motifs, as high\u2010performance CIB anodes. The decreasing electronegativity along dichalcogenide bonds (S\u2500S &gt; Se\u2500Se &gt; Te\u2500Te) progressively elevates the lowest unoccupied molecular orbital energy from \u22122.80 (Ph\u20102S) to \u22122.50 (Ph\u20102Se) and \u22122.00 eV (Ph\u20102Te), shifting the redox potentials to increasingly negative values of \u22120.76, \u22120.82, and \u22120.84 V, respectively. Moreover, Ph\u20102Te shows the strongest redox activity to start four\u2010electron Te\u2010conversion with 98% utilization (vs. 65% of Ph\u20102Se and 31% of Ph\u20102S). Consequently, Ph\u20102Te anode liberates the highest capacity of 257 mAh g\n                    <jats:sup>\u22121<\/jats:sup>\n                    , outperforming Ph\u20102S (152 mAh g\n                    <jats:sup>\u22121<\/jats:sup>\n                    ) and Ph\u20102Se (223 mAh g\n                    <jats:sup>\u22121<\/jats:sup>\n                    ). Notably, Ph\u20102Te anode enables state\u2010of\u2010the\u2010art CIBs with a high redox voltage (1.2 V), an active\u2010material\u2010pair level energy density (68 Wh kg\n                    <jats:sup>\u22121<\/jats:sup>\n                    ), and a long lifespan (5000 cycles). This work establishes dichalcogenide engineering as a promising strategy toward low\u2010redox\u2010potential organic anodes for advanced CIBs.\n                  <\/jats:p>","DOI":"10.1002\/anie.5837924","type":"journal-article","created":{"date-parts":[[2026,8,24]],"date-time":"2026-08-24T03:59:33Z","timestamp":1787543973000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Dichalcogenide Electronegativity Engineering Enables Low\u2010Redox\u2010Potential Organic Anodes for High\u2010Performance Calcium\u2010Ion Batteries"],"prefix":"10.1002","volume":"65","author":[{"given":"Wenyan","family":"Du","sequence":"first","affiliation":[{"name":"Shanghai Key Laboratory of Chemical Assessment and Sustainability School of Chemical Science and Engineering State Key Laboratory of Cardiovascular Diseases and Medical Innovation Center Shanghai East Hospital Tongji University  Shanghai 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Laboratory of Cardiovascular Diseases and Medical Innovation Center Shanghai East Hospital Tongji University  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0077-9048","authenticated-orcid":false,"given":"Yaokang","family":"Lv","sequence":"additional","affiliation":[{"name":"College of Chemical Engineering Zhejiang University of Technology  Hangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3652-8822","authenticated-orcid":false,"given":"Lihua","family":"Gan","sequence":"additional","affiliation":[{"name":"Shanghai Key Laboratory of Chemical Assessment and Sustainability School of Chemical Science and Engineering State Key Laboratory of Cardiovascular Diseases and Medical Innovation Center Shanghai East Hospital Tongji University  Shanghai 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