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Herein, we report a rationally designed bisimidazolium salt, 1,4\u2010bis(3\u2010methylimidazolium\u20101\u2010yl) butane dibromide ([bMImB]Br\u2082), which features a symmetric molecular structure that reconciles this contradiction. [bMImB]Br\u2082 demonstrates strong bromine affinity, stemming from its high atomic charge of N\n                    <jats:sup>+<\/jats:sup>\n                    and low solubility\u2014properties comparable to those of tetraalkyl\u2010quaternary ammonium salts. Simultaneously, it retains low steric hindrance typical of monoimidazole compounds, thereby enabling fast electrode kinetics. As a result, Zn\u2013Br batteries incorporating [bMImB]Br\u2082 deliver a high specific energy of 116 Wh\u00b7kg\u207b\u00b9, alongside an average coulombic efficiency (CE) of 99.22% and energy efficiency (EE) of 89.35% at 10 mAh\u00b7cm\u207b\n                    <jats:sup>2<\/jats:sup>\n                    (0.5 C) for over 150 cycles. Furthermore, the flexible pouch cell maintains a discharge capacity of 110 mAh and 99.7% CE over 100 cycles, even under mechanical deformation. This work offers a generalizable molecular design strategy for developing next\u2010generation BCAs in halogen\u2010based energy storage systems.\n                  <\/jats:p>","DOI":"10.1002\/anie.202509293","type":"journal-article","created":{"date-parts":[[2025,6,29]],"date-time":"2025-06-29T22:03:56Z","timestamp":1751234636000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["Optimizing Bromine Complexation and Kinetics: a Bisimidazole Strategy for High\u2010Performance Zn\u2010Br Static Batteries"],"prefix":"10.1002","volume":"64","author":[{"given":"Yunting","family":"Wu","sequence":"first","affiliation":[{"name":"State Key Laboratory of Chem\/Biosensing and Chemometrics, Joint International Research Laboratory of Energy Electrochemistry College of Chemistry and Chemical Engineering Hunan University Changsha 410082 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Engineering Hunan University Changsha 410082 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wei","family":"Zhang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Chem\/Biosensing and Chemometrics, Joint International Research Laboratory of Energy Electrochemistry College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xin","family":"He","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Chem\/Biosensing and Chemometrics, Joint International Research Laboratory of Energy Electrochemistry College of Chemistry and Chemical Engineering Hunan University Changsha 410082 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 Chem\/Biosensing and 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