{"product_id":"cbesahfme","title":"HFME (Hexafluoroisopropyl Methyl Ether, HFPM, \u003e99.5%) as Battery Electrolyte Co-Solvent and Additive, 10-50 g\/bottle, CBESAHFME","description":"\u003cp\u003eHexafluoroisopropyl methyl ether (commonly designated as HFME or HFPM, and structurally related to HFE-356mmz) is a specialized hydrofluoroether featuring a compact methyl group paired with a strongly electron-withdrawing hexafluoroisopropyl moiety. It functions as an advanced semi-solvating co-solvent, diluent, and interphase-directing additive for next-generation lithium-metal, lithium-ion, and sodium-ion batteries.\u003c\/p\u003e\n\u003cp\u003eIts main functional roles in electrolyte engineering are: (1) \u003cstrong\u003eLocalized High-Concentration Electrolyte (LHCE) Diluent\u003c\/strong\u003e: HFME expands free-solvent volume and lowers bulk liquid viscosity, facilitating rapid separator wetting and ionic transport while keeping the primary salt-solvent cluster structure intact. (2) \u003cstrong\u003eExtreme Low-Temperature Performance\u003c\/strong\u003e: Because of its unique semi-solvating capacity, HFME-based LHCEs prevent desolvation freezing, enabling stable high-rate charge\/discharge operation down to -40 °C (retaining high room-temperature capacity retention where conventional carbonate\/ether blends fail). (3) \u003cstrong\u003eInterphase Passivation (SEI \/ CEI Engineering)\u003c\/strong\u003e: HFME undergoes preferential reductive decomposition during initial formation cycles, constructing a robust, inorganic-rich Solid Electrolyte Interphase (SEI) containing metal fluorides (LiF \/ NaF) that suppress dendrite nucleation on reactive lithium or sodium metal anodes. (4) \u003cstrong\u003eIntrinsic Non-Flammability\u003c\/strong\u003e: The dense local fluorine concentration suppresses vapor-phase radical propagation, significantly raising thermal abuse thresholds compared to conventional volatile hydrocarbons.  \u003c\/p\u003e\n\u003cp\u003eIts main electrochemical applications are: (1) \u003cstrong\u003eLow-Temperature \u0026amp; High-Rate Lithium-Metal Batteries\u003c\/strong\u003e: Deployed in demanding environments (such as cold-climate electric vehicles or high-altitude aerospace drones) requiring wide thermal operation windows from -40 °C to 60°C. (2) \u003cstrong\u003eHigh-Temperature Sodium-Ion Systems\u003c\/strong\u003e: Stabilizes sodium metal anode surfaces by forming a protective fluorine-containing organic\/inorganic passivation layer that mitigates exothermic decomposition.\u003c\/p\u003e\n\u003ctable width=\"100%\" style=\"width: 100%; height: 334.325px;\"\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\u003eCBESAHFME (C-BESA-HFME)\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\u003e13171-18-1\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 153.725px;\"\u003e\n\u003ctd style=\"width: 33.7019%; height: 153.725px;\"\u003e\u003cem\u003eChemical Formula\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.9772%; height: 153.725px;\"\u003e\n\u003cp\u003e\u003cspan\u003eC\u003c\/span\u003e\u003csub\u003e4\u003c\/sub\u003e\u003cspan\u003eH\u003c\/span\u003e\u003csub\u003e4\u003c\/sub\u003e\u003cspan\u003eF\u003c\/span\u003e\u003csub\u003e6\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\/CBESAHFME_Structure_100x100.jpg?v=1789890434\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 34.6px;\"\u003e\n\u003ctd style=\"width: 33.7019%; height: 34.6px;\"\u003e\u003cem\u003eAppearance\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.9772%; height: 34.6px;\"\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\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: 33.7019%; height: 19.6px;\"\u003e\u003cem\u003ePackage Size\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.9772%; height: 19.6px;\"\u003e\u003cspan\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 store the HFME 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\u003ca href=\"https:\/\/onlinelibrary.wiley.com\/doi\/abs\/10.1002\/anie.202506083\"\u003e\u003cspan\u003eC. Wang, et al. Localized High-Concentration Electrolytes With Semi-Solvated Hexafluoroisopropyl Methyl Ether Diluent for Wide-Temperature-Range Lithium Metal Batteries, Angew Chem Int Ed, 2025, 64, e202506083\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003ca href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0013468619314902\"\u003eW. Dai, et al. Localized concentrated high-concentration electrolyte enhanced stability and safety for high voltage Li-ion batteries, Electrochimica Acta, 2019, 320, 134633\u003c\/a\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"CHEMFISH","offers":[{"title":"10 g","offer_id":48412656107750,"sku":"CBESAHFME10","price":109.0,"currency_code":"USD","in_stock":true},{"title":"25 g","offer_id":48412656140518,"sku":"CBESAHFME25","price":229.0,"currency_code":"USD","in_stock":true},{"title":"50 g","offer_id":48412656173286,"sku":"CBESAHFME50","price":419.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CBESAHFME_main.jpg?v=1789890434","url":"https:\/\/echemsupplies.com\/products\/cbesahfme","provider":"EChem Supplies","version":"1.0","type":"link"}