{"product_id":"clibeacsftfsi","title":"CsFTFSI {[Cesium (Fluorosulfonyl)(trifluoromethanesulfonyl)imide,], \u003e99.9%} Powder as Electrolyte Additive for Lithium-Ion Battery, 10-50 g\/bottle, CLIBEACsFTFSI","description":"\u003cp\u003eCsFTFSI (Cesium (fluorosulfonyl)(trifluoromethanesulfonyl)imide, CsN(SO2F)(SO2CF3)) is an asymmetric heavy alkali-metal imide salt utilized as a high-performance functional additive in non-aqueous electrolytes for lithium-metal, lithium-sulfur, and high-voltage battery systems. It pairs the Cs+ cation—the largest stable non-radioactive alkali ion—with the asymmetric FTFSI- hybrid anion, delivering dual-action protection for high-energy-density cells.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaximum Electrostatic Shielding \u003c\/strong\u003e(Cs+): The Cs+ cation provides an effective Self-Healing Electrostatic Shield (SHES): The standard reduction potential of Cs+ (~ -2.92 V vs. SHE) is slightly less negative than that of Li+ (~ -3.04 V). During fast charging, electric fields concentrate at microscopic peaks\/dendrite tips on the lithium anode. Cs+ ions rapidly migrate to these high-field regions and accumulate without being reduced into metallic cesium. This accumulation forms a localized positive electrostatic buffer that repels incoming Li+ ions toward surrounding valleys, driving uniform, planar lithium electrodeposition across the anode surface.\u003c\/p\u003e\n\u003cp\u003eThe asymmetric FTFSI- anion addresses the key limitations of both pure FSI- and TFSI- anions: (1) \u003cstrong\u003eInorganic-Rich SEI (LiF\/Li2S)\u003c\/strong\u003e: The weaker S–F bond on the fluorosulfonyl arm decomposes rapidly under reductive potentials at the anode, yielding a dense inner Solid Electrolyte Interphase (SEI) rich in lithium fluoride (LiF) and lithium sulfide (Li2S). This layer provides high mechanical modulus and fast Li+ interfacial diffusion. (2) \u003cstrong\u003eSuppressed Aluminum Corrosion\u003c\/strong\u003e: Pure FSI- can severely corrode the aluminum current collector at potentials above 3.8 V vs. Li\/Li+. The presence of the fluorinated -CF3 tail in FTFSI- stabilizes the cathode surface and forms a protective passivating film on aluminum, enabling higher voltage operation. (3) \u003cstrong\u003eThermal \u0026amp; Hydrolytic Stability\u003c\/strong\u003e: The asymmetric structure increases thermal decomposition resistance relative to pure FSI- while lowering electrolyte viscosity compared to pure TFSI-.\u003c\/p\u003e\n\u003ctable width=\"100%\" style=\"width: 100%; height: 296px;\"\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\u003eCLIBEACsFTFSI (C-LIB-EA-CsFTFSI)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 150px;\"\u003e\n\u003ctd style=\"width: 33.6331%; height: 150px;\"\u003e\u003cem\u003eChemical Formula\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.0072%; height: 150px;\"\u003e\n\u003cp\u003eCsCF4NO4S2\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CLIBEACsFTFSI_02_100x100.jpg?v=1785770733\" 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\u003eWhite Powder\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\u003ePurity\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.0072%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e\u0026gt;99.9% (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\u003e363.03 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\u003ePackage Size\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.0072%; height: 19.6px;\"\u003e10 g, 25 g, and 50 g\/bottle\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 CsFTFSI powder 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\n\u003ca href=\"https:\/\/pubs.rsc.org\/eb\/article\/doi\/10.1039\/d6eb00050a\/1244564\/Secondary-alkali-metal-salts-in-supporting\"\u003e\u003cspan\u003eT. J. Leckie, et al. Secondary alkali-metal salts in supporting electrolytes for lithium polysulfide flow batteries, EES Batteries, 2026, DOI: 10.1039\/d6eb00050a.\u003c\/span\u003e\u003c\/a\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/pubs.rsc.org\/cc\/article-abstract\/61\/68\/12618\/882698\/Rational-engineering-of-electrolytes-for-lithium\"\u003e\u003cspan\u003eK. Rajsundar, et al., Rational engineering of electrolytes for lithium–sulfur batteries, Chemical Communications, 2025, 61, 12618–12642\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"DDDC","offers":[{"title":"10 g","offer_id":48105192292582,"sku":"CLIBEACsFTFSI10","price":169.0,"currency_code":"USD","in_stock":true},{"title":"25 g","offer_id":48105192325350,"sku":"CLIBEACsFTFSI25","price":379.0,"currency_code":"USD","in_stock":true},{"title":"50 g","offer_id":48105192358118,"sku":"CLIBEACsFTFSI50","price":729.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CLIBEACsFTFSI_main.jpg?v=1785770733","url":"https:\/\/echemsupplies.com\/products\/clibeacsftfsi","provider":"EChem Supplies","version":"1.0","type":"link"}