{"product_id":"cbesaf4dee","title":"F4DEE {1,2-Bis(2,2-difluoroethoxy)ethane, \u003e99.0%} as Battery Electrolyte Co-Solvent and Additive, 5-25 g\/bottle, CBESAF4DEE","description":"\u003cp\u003eF4DEE (1,2-bis(2,2-difluoroethoxy)ethane) is a high-purity, linear fluorinated ether solvent and co-solvent engineered specifically for advanced next-generation energy storage systems. By incorporating terminal 2,2-difluoroethoxy groups onto a central ethylene glycol diether backbone, F4DEE provides an exceptional balance of oxidative stability, ionic transport, and interphase-directing capability for lithium-metal and lithium-sulfur batteries.\u003c\/p\u003e\n\u003cp\u003eIts functional roles in electrolyte engineering are: (1) \u003cstrong\u003eRobust Solid Electrolyte Interphase (SEI) Passivation\u003c\/strong\u003e: Due to its tailored reduction potential, F4DEE preferentially decomposes during initial electrochemical cycling to assist in building a dense, inorganic-rich SEI layer heavily enriched with lithium fluoride (LiF) on lithium metal anodes, effectively suppressing dendrite propagation and dead lithium accumulation. (2) \u003cstrong\u003eEnhanced Oxidative and High-Voltage Stability\u003c\/strong\u003e: The electron-withdrawing inductive effect of the terminal fluorine atoms lowers the Highest Occupied Molecular Orbital (HOMO) energy level, elevating the anodic stability threshold and preventing premature electrolyte oxidation. (3) \u003cstrong\u003eOptimized Polysulfide Solubility\u003c\/strong\u003e: In sulfur-based systems, F4DEE exhibits a moderate dissolving power toward lithium polysulfide (LiPS) intermediates, helping contain the polysulfide shuttle effect while maintaining active reaction kinetics. (4) \u003cstrong\u003eLocalized High-Concentration Electrolyte (LHCE) Integration\u003c\/strong\u003e: When deployed as a co-solvent or diluent, F4DEE lowers bulk viscosity and enhances separator wettability without disrupting the primary ion-solvent coordination clusters characteristic of concentrated systems.\u003c\/p\u003e\n\u003ctable width=\"100%\" style=\"width: 100%; height: 328.2px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 33.7019%; height: 35.6px;\"\u003e\u003cem\u003ePart Number\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.9772%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003eCBESAF4DEE (C-BESA-F4DEE)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 33.7019%; height: 35.6px;\"\u003e\u003cem\u003eCAS\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.9772%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e1691328-94-5\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 120px;\"\u003e\n\u003ctd style=\"width: 33.7019%; height: 120px;\"\u003e\u003cem\u003eChemical Formula\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.9772%; height: 120px;\"\u003e\n\u003cp\u003e\u003cspan\u003eC\u003c\/span\u003e\u003csub\u003e6\u003c\/sub\u003e\u003cspan\u003eH\u003c\/span\u003e\u003csub\u003e10\u003c\/sub\u003e\u003cspan\u003eF\u003c\/span\u003e\u003csub\u003e4\u003c\/sub\u003e\u003cspan\u003eO\u003c\/span\u003e\u003csub\u003e2\u003c\/sub\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CBESAF4DEE_Structure_100x100.jpg?v=1789897072\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 33.7019%; height: 35.6px;\"\u003e\u003cem\u003eAppearance\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.9772%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003eColorless liquid\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 42.6px;\"\u003e\n\u003ctd style=\"width: 33.7019%; height: 42.6px;\"\u003e\n\u003cstrong\u003e \u003c\/strong\u003e\u003cem\u003ePurity\u003c\/em\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 65.9772%; height: 42.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e\u0026gt;99.0%\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 33.7019%; height: 19.6px;\"\u003e\u003cem\u003eMolecular Weight\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.9772%; height: 19.6px;\"\u003e\u003cspan\u003e190.14 g\/mol\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 33.7019%;\"\u003e\u003cem\u003eDensity\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.9772%;\"\u003e\u003cspan\u003e1.17 g\/mL at 25 °C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 33.7019%; height: 19.6px;\"\u003e\u003cem\u003eBoiling Point\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.9772%; height: 19.6px;\"\u003e\u003cspan\u003e172.8 °C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 33.7019%; height: 19.6px;\"\u003e\u003cem\u003ePackage Size\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.9772%; height: 19.6px;\"\u003e\u003cspan\u003e5 g, 10 g, and 25 g\/bottle\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eNotes\u003c\/strong\u003e: Please store the F4DEE liquid in the dry place (glovebox is the best).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eReferences\u003c\/strong\u003e: \u003c\/span\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/pubs.acs.org\/aelccp\/article-abstract\/10\/11\/5674\/3757754\/Tailoring-Electrolytes-by-Decoupling-the-Roles-of?redirectedFrom=fulltext\"\u003e\u003cspan\u003eJ. Yang, et al. Tailoring Electrolytes by Decoupling the Roles of Li+ and Lithium Polysulfides in Li–S Batteries, ACS Energy Lett. (2025) 10 (11): 5674–5683.\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003ca href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0378775325025893\"\u003eR. Jayakumar, et al. Ethylene sulfate-enabled stable interphases in fluorinated ether electrolytes for high-performance sodium-ion batteries, Journal of Power Sources, 2026, 662, 238753\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"CHEMFISH","offers":[{"title":"5 g","offer_id":48412808151270,"sku":"CBESAF4DEE5","price":179.0,"currency_code":"USD","in_stock":true},{"title":"10 g","offer_id":48412808184038,"sku":"CBESAF4DEE10","price":329.0,"currency_code":"USD","in_stock":true},{"title":"25 g","offer_id":48412808216806,"sku":"CBEATFMP25","price":799.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CBESAF4DEE_main.jpg?v=1789897072","url":"https:\/\/echemsupplies.com\/products\/cbesaf4dee","provider":"EChem Supplies","version":"1.0","type":"link"}