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Conventional electrolytes are limited by sluggish ion transport and unstable electrode\u2010electrolyte interphases at low temperatures, severely degrading the performance of electrochemical ESDs under extreme cold. Herein, we report a weak\u2010aggregation (AGG\u2010w) electrolyte reconciling bulk\u2010phase ion transport with interfacial kinetics at ultra\u2010low temperatures (ULT). This is achieved through the strategic incorporation of unilaterally fluorinated motif as strong electron\u2010withdrawing group, which enhances steric hindrance and reconfigure molecular dipole to reinforce dipole\u2013dipole interaction with the solvents anchored in the primary solvation shell. Such restructuring enables unprecedented solvent\u2010anion cooperativity by weakening Li\n                    <jats:sup>+<\/jats:sup>\n                    \u2010dipole interaction and promoting greater anion participation, thereby accelerating desolvation kinetics, reducing interfacial resistance, and simultaneously preserving low viscosity and high ionic conductivity at ULT. Notably, 1100 F real pouch cells with AGG\u2010w electrolyte maintain 97.9% capacity retention after 7 months of continuous operation at \u221240\u00b0C and demonstrate emerging discharge capability at \u2212100\u00b0C, a milestone never previously reported. This work underscores weak\u2010interaction engineering as a critical paradigm for electrolyte design and establishes a generalizable strategy for high\u2010performance electrochemistry in extreme conditions.\n                  <\/jats:p>","DOI":"10.1002\/anie.6979216","type":"journal-article","created":{"date-parts":[[2026,3,18]],"date-time":"2026-03-18T14:37:24Z","timestamp":1773844644000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["A Weak\u2010Aggregation Electrolyte Enables Lithium\u2010Ion Capacitors at Ultra\u2010Low Temperature"],"prefix":"10.1002","volume":"65","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-5144-9214","authenticated-orcid":false,"given":"Chunlei","family":"Zhang","sequence":"first","affiliation":[{"name":"State Key Laboratory of High Density Electromagnetic Power and Systems Institute of Electrical Engineering Chinese Academy of Sciences  Beijing China"},{"name":"University of 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