{"product_id":"cbesamtfee","title":"MTFEE (Methyl 1,1,2,2-Tetrafluoroethyl Ether, HFE-254, \u003e99.5%) as Battery Electrolyte Co-Solvent and Additive, 25-100 g\/bottle, CBESAMTFEE","description":"\u003cp\u003eMethyl 1,1,2,2-tetrafluoroethyl ether (commonly designated as MTFEE or HFE-254) is a specialized hydrofluoroether that has gained traction as a high-performance co-solvent, diluent, and functional additive for next-generation lithium-metal, lithium-sulfur, and sodium-ion liquid electrolytes. Its asymmetric fluorinated structure bridges the gap between conventional carbonate\/ether solvents and highly fluorinated, non-flammable media.\u003c\/p\u003e\n\u003cp\u003eIts main functional roles in electrolyte engineering are: (1) \u003cstrong\u003eLocalized High-Concentration Electrolyte (LHCE) Diluent\u003c\/strong\u003e: MTFEE acts as an \"inert\" diluent that does not actively coordinate with Li+ or Na+ ions. By expanding the free volume and reducing the molar concentration of coordinating solvents without precipitating the salt, it lowers overall electrolyte viscosity while retaining the high-voltage stability of a concentrated cluster. (2) \u003cstrong\u003eInterfacial Passivation \u0026amp; SEI Engineering\u003c\/strong\u003e: Due to its low reduction potential relative to standard alkyl ethers, MTFEE participates in the early-stage reductive decomposition at the lithium or sodium metal anode. This yields a robust, inorganic-rich Solid Electrolyte Interphase (SEI) containing metal fluorides (LiF \/ NaF) that suppress dendrite propagation. (3) \u003cstrong\u003eFlammability Suppression\u003c\/strong\u003e: The high fluorine content significantly elevates thermal resistance and lowers the flash point risk, mitigating catastrophic thermal runaway in abusive overcharge or short-circuit scenarios.\u003c\/p\u003e\n\u003ctable width=\"100%\" style=\"width: 100%; height: 342.6px;\"\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\u003eCBESAHTFEE (C-BESA-HTFEE)\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\u003e425-88-7\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 161px;\"\u003e\n\u003ctd style=\"width: 33.7019%; height: 161px;\"\u003e\u003cem\u003eChemical Formula\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.9772%; height: 161px;\"\u003e\n\u003cp\u003e\u003cspan\u003eC\u003c\/span\u003e\u003csub\u003e3\u003c\/sub\u003e\u003cspan\u003eH\u003c\/span\u003e\u003csub\u003e4\u003c\/sub\u003e\u003cspan\u003eF\u003c\/span\u003e\u003csub\u003e4\u003c\/sub\u003e\u003cspan\u003eO\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CBESAMTFEE_structure_100x100.jpg?v=1789795196\" 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: 35.6px;\"\u003e\n\u003ctd style=\"width: 33.7019%; height: 35.6px;\"\u003e\n\u003cstrong\u003e \u003c\/strong\u003e\u003cem\u003ePurity\u003c\/em\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 65.9772%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e\u0026gt;99.5% (Battery Grade)\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\u003e132.06  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\u003e25 g, 50 g, and 100 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 MTFEE in the glovebox due to its sensitivity to humidity and oxygen.\u003c\/span\u003e\u003cspan\u003e \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\u003cspan\u003e\u003ca href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S1385894725008113\"\u003eJ. B. Park, et al. Designing bifunctional cosolvent-based electrolyte to optimize anion-cation associations for a stable electrode-electrolyte interphase in high-nickel li-metal batteries, Chemical Engineering Journal, 2025, 506, 160012\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003ca href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S2352152X24019327\"\u003eY. Han, et al. High-voltage ether-based electrolytes for lithium metal batteries via synergy between the solvent and additive, Journal of Energy Storage, 2024, 95, 112346\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"CHEMFISH","offers":[{"title":"25 g","offer_id":48400324526310,"sku":"CBESAMTFEE25","price":149.0,"currency_code":"USD","in_stock":true},{"title":"50 g","offer_id":48400324559078,"sku":"CBESAMTFEE50","price":279.0,"currency_code":"USD","in_stock":true},{"title":"100 g","offer_id":48400324591846,"sku":"CBESAMTFEE100","price":499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CBESAMTFEE_main.jpg?v=1789795195","url":"https:\/\/echemsupplies.com\/products\/cbesamtfee","provider":"EChem Supplies","version":"1.0","type":"link"}