{"product_id":"cbesbtfe","title":"BTFE {Bis(2,2,2-trifluoroethyl) ether, \u003e99.5%} as Battery Electrolyte Co-Solvent, 10-50 g\/bottle, CBESBTFE","description":"\u003cp\u003eBis(2,2,2-trifluoroethyl) ether (BTFE, formula CF3CH2-O-CH2CF3) is a symmetrical fluorinated ether co-solvent \/ diluent widely utilized in non-aqueous electrolytes for lithium-metal, high-voltage lithium-ion, and localized high-concentration electrolytes (LHCEs). It combines two strongly electron-withdrawing trifluoromethyl (-CF3) groups attached to an ether backbone, fundamentally altering its solvation capability, flammability, and electrochemical window compared to standard unfluorinated ethers like DME or DEE.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNon-Solvating Diluent in LHCEs\u003c\/strong\u003e: BTFE is a classic \"diluent\" solvent used to formulate Localized High-Concentration Electrolyte (LHCE) systems: (1) \u003cstrong\u003eSolvation Behavior\u003c\/strong\u003e: Because of the strong electron-withdrawing effect of the six fluorine atoms, the oxygen atom in BTFE has extremely low donor power (low Gutmann Donor Number). As a result, BTFE does not dissolve lithium salts directly and does not participate in the primary Li+ solvation sheath. (2) \u003cstrong\u003eMicrostructure Preservation\u003c\/strong\u003e: When added to a high-concentration salt\/solvent mixture (e.g., 4M LiFSI in DME), BTFE dilutes the bulk viscosity and enhances ionic transport without breaking up the localized salt-solvent contact ion pair (CIP) and aggregate (AGG) clusters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHigh Oxidation Stability for High-Voltage Cathodes\u003c\/strong\u003e: Unfluorinated ethers typically decompose at potentials above 4.0 V vs. Li\/Li+. The high fluorine content significantly lowers the Highest Occupied Molecular Orbital (HOMO) energy level of BTFE. This expands the anodic oxidation stability window beyond 4.5-5.0 V, making ether-based electrolytes compatible with nickel-rich cathodes (NMC811, NMC955) and high-voltage cobalt systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInorganic-Rich Interphase Formation \u0026amp; Flammability Reduction\u003c\/strong\u003e: \u003cem\u003eAnode Stability\u003c\/em\u003e: Under reductive potentials at the Li metal anode, BTFE undergoes sacrificial decomposition to yield a dense, mechanically robust, lithium fluoride (LiF)-rich Solid Electrolyte Interphase (SEI). \u003cem\u003eSafety\u003c\/em\u003e: The high fluorine-to-carbon ratio drastically elevates the flash point and suppresses flame propagation, imparting non-flammable or self-extinguishing properties to carbonate and ether electrolyte formulations.\u003c\/p\u003e\n\u003ctable style=\"width: 100%; height: 350.8px;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 33.6331%; height: 35.6px;\"\u003e\u003cem\u003ePart Number\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.0072%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003eCBESBTFE (C-BES-BTFE)\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: 33.6331%; height: 35.6px;\"\u003e\u003cem\u003eCAS\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.0072%; height: 35.6px;\"\u003e\n\u003cp\u003e333-36-8\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 130px;\"\u003e\n\u003ctd style=\"width: 33.6331%; height: 130px;\"\u003e\u003cem\u003eChemical Formula\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.0072%; height: 130px;\"\u003e\n\u003cp\u003e(CF3CH2)2O\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CBESBTFE_02_100x100.jpg?v=1785791979\" 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: 33.6331%; height: 35.6px;\"\u003e\u003cem\u003eAppearance\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.0072%; 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: 33.6331%; height: 35.6px;\"\u003e\n\u003cstrong\u003e \u003c\/strong\u003e\u003cem\u003ePurity\u003c\/em\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 66.0072%; 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: 33.6331%; height: 19.6px;\"\u003e\u003cem\u003eMolecular Weight\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.0072%; height: 19.6px;\"\u003e\u003cspan\u003e182.06 g\/mol\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 33.6331%; height: 19.6px;\"\u003e\u003cem\u003eBoiling Point\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.0072%; height: 19.6px;\"\u003e\u003cspan\u003e~62-63 °C (lit.)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 33.6331%; height: 19.6px;\"\u003e\u003cem\u003eDensity\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.0072%; height: 19.6px;\"\u003e\u003cspan\u003e1.404 g\/mL at 25 °C (lit.)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 33.6331%; height: 19.6px;\"\u003e\u003cem\u003ePackage Size\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.0072%; height: 19.6px;\"\u003e\u003cspan\u003e10 g, 25 g, and 50 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 try to store the BTFE liquid in a 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:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0378775322012769\"\u003e\u003cspan\u003eR. May, et al. Fluorinated ether decomposition in localized high concentration electrolytes, Journal of Power Sources, 2023, 553, 232299.\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/pubs.acs.org\/aamick\/article-abstract\/6\/11\/8006\/1473490\/Bis-2-2-2-trifluoroethyl-Ether-As-an-Electrolyte?redirectedFrom=fulltext\"\u003e\u003cspan\u003eM. L. Gordin, et al. Bis(2,2,2-trifluoroethyl) Ether As an Electrolyte Co-solvent for Mitigating Self-Discharge in Lithium–Sulfur Batteries, ACS Appl. Mater. Interfaces (2014) 6 (11): 8006–8010. \u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"DDDC","offers":[{"title":"10 g","offer_id":48109831389414,"sku":"CBESBTFE10","price":109.0,"currency_code":"USD","in_stock":true},{"title":"25 g","offer_id":48109831422182,"sku":"CBESBTFE25","price":239.0,"currency_code":"USD","in_stock":true},{"title":"50 g","offer_id":48125643391206,"sku":"CBESBTFE50","price":429.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CBESBTFE_main.jpg?v=1785791979","url":"https:\/\/echemsupplies.com\/products\/cbesbtfe","provider":"EChem Supplies","version":"1.0","type":"link"}