{"product_id":"cbesaf5dee","title":"F5DEE {2-[2-(2, 2-Difluoroethoxy)ethoxy]-1,1,1-Trifluoroethane, \u003e99.0%} as Battery Electrolyte Co-Solvent and Additive, 5-25 g\/bottle, CBESAF5DEE","description":"\u003cp\u003eF5DEE (2-[2-(2,2-difluoroethoxy)ethoxy]-1,1,1-trifluoroethane) is an advanced asymmetric fluorinated diether engineered as a high-performance co-solvent, diluent, and interphase-directing additive for next-generation lithium-metal and high-voltage lithium-ion batteries. By integrating a diethylene glycol backbone terminated by two distinct fluorinated alkyl groups (one trifluoroethyl and one difluoroethyl unit), F5DEE achieves a unique blend of solvation capacity, oxidative stability, and interfacial passivation.\u003c\/p\u003e\n\u003cp\u003eIts functional roles in electrolyte engineering are: (1) \u003cstrong\u003eSolvation Sheath \u0026amp; Anion Coordination\u003c\/strong\u003e: F5DEE modifies the primary lithium-ion coordination shell by discouraging solvent-separated ion pairing and encouraging inner-sphere anion incorporation, which is critical for forming stable, highly conductive interphases. (2) \u003cstrong\u003eMultifacial Interphase (SEI\/CEI) Passivation\u003c\/strong\u003e: Due to its asymmetric fluorination profile, F5DEE undergoes preferential electrochemical reduction during initial formation cycles on the anode—yielding a dense, inorganic-rich Solid Electrolyte Interphase (SEI) heavily enriched with lithium fluoride (LiF)—while also helping passivate high-voltage transition metal oxide cathodes. (3) \u003cstrong\u003eLocalized High-Concentration Electrolyte (LHCE) Integration\u003c\/strong\u003e: When deployed as a structural co-solvent or diluent, F5DEE expands free-solvent volume, lowers bulk liquid viscosity, and enhances separator wettability without disrupting the primary ion-solvent clusters of concentrated salt solutions. (4) \u003cstrong\u003eOxidative Stability Enhancement\u003c\/strong\u003e: The terminal fluorinated groups lower the Highest Occupied Molecular Orbital (HOMO) energy level, elevating the anodic stability threshold and suppressing electrolyte degradation during high-voltage operation.\u003c\/p\u003e\n\u003cp\u003eThe primary electrochemical domains are: (1) \u003cstrong\u003eHigh-Performance Lithium-Metal Batteries (LMBs)\u003c\/strong\u003e: Paired with high-capacity lithium anodes and advanced salts (e.g., LiFSI) to achieve high Coulombic efficiencies, suppress dendrite propagation, and extend cycle longevity under lean-electrolyte conditions. (2) \u003cstrong\u003eHigh-Voltage Full Cells\u003c\/strong\u003e: Integrated into formulations paired with nickel-rich layered oxide cathodes (such as NMC811) operating above 4.3 V to minimize parasitic side reactions and transition-metal dissolution. (3) \u003cstrong\u003eAnode-Free and Advanced Systems\u003c\/strong\u003e: Utilized to support uniform plating\/stripping behavior on bare current collectors, improving practical energy density.\u003c\/p\u003e\n\u003ctable width=\"100%\" style=\"width: 100%; height: 307.925px;\"\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\u003eCBESAF5DEE (C-BESA-F5DEE)\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\u003e2863676-48-4\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 112.725px;\"\u003e\n\u003ctd style=\"width: 33.7019%; height: 112.725px;\"\u003e\u003cem\u003eChemical Formula\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.9772%; height: 112.725px;\"\u003e\n\u003cp\u003e\u003cspan\u003eC\u003c\/span\u003e\u003csub\u003e6\u003c\/sub\u003e\u003cspan\u003eH\u003c\/span\u003e\u003csub\u003e9\u003c\/sub\u003e\u003cspan\u003eF\u003c\/span\u003e\u003csub\u003e5\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\/CBESAF5DEE_Structure_100x100.jpg?v=1789927683\" 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: 10px;\"\u003e\n\u003ctd style=\"width: 33.7019%; height: 10px;\"\u003e\n\u003cstrong\u003e \u003c\/strong\u003e\u003cem\u003ePurity\u003c\/em\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 65.9772%; height: 10px;\"\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\u003e208.13 g\/mol\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 F5DEE 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\/jaaucr\/article\/6\/4\/2288\/5145267\/Generative-Electrolyte-Solvent-and-Formulation\"\u003e\u003cspan\u003eJ. Kim, et al. Generative Electrolyte Solvent and Formulation Discovery, JACS Au (2026) 6 (4): 2288–2302.\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/pubs.acs.org\/nalefd\/article-abstract\/23\/16\/7524\/312792\/Proximity-Matters-Interfacial-Solvation-Dictates?redirectedFrom=fulltext\"\u003e\u003cspan\u003eS. T. Oyakhire, et al. Proximity Matters: Interfacial Solvation Dictates Solid Electrolyte Interphase Composition, Nano Lett. (2023) 23 (16): 7524–7531.\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"CHEMFISH","offers":[{"title":"5 g","offer_id":48412869066982,"sku":"CBESAF5DEE5","price":199.0,"currency_code":"USD","in_stock":true},{"title":"10 g","offer_id":48412869099750,"sku":"CBESAF5DEE10","price":369.0,"currency_code":"USD","in_stock":true},{"title":"25 g","offer_id":48412869132518,"sku":"CBESAF5DEE25","price":879.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CBESAF5DEE_main.jpg?v=1789927682","url":"https:\/\/echemsupplies.com\/products\/cbesaf5dee","provider":"EChem Supplies","version":"1.0","type":"link"}