{"product_id":"clcsibsepchc","title":"Specific Electrolyte for Long-Cycling Sodium-Ion Battery (Polyanion Cathode + Hard Carbon), 200 g\/bottle, CLCSIBSEPCHC","description":"\u003cp\u003eFor a polyanion cathode—such as Na3V2(PO4)3 (NVP), Na3V2(PO4)2F3 (NVPF), or Na4Fe3(PO4)2(P2O7) (NFPP)—paired with a Hard Carbon (HC) anode, the electrolyte formulation differs significantly from layered oxide (NFM\/NMC) systems. Polyanion frameworks are covalently bonded via robust (PO4)^{3-} units, eliminating catastrophic transition-metal leaching and high-voltage oxygen evolution. Consequently, the bottleneck shifts to anode SEI passivity at low potentials (\u0026lt;0.1 V vs. Na\/Na+), suppressing parasitic gas evolution during high-voltage holds (\u0026gt;3.8–4.2 V for NVPF), and enabling ultra-long cycle life (\u0026gt;3,000–5,000 cycles).\u003c\/p\u003e\n\u003cp\u003eThe key formulation mechanics are: (1) \u003cstrong\u003eDual-Salt Synergy (NaPF6 + NaFSI) for NVP\/NFPP\u003c\/strong\u003e: Pure NaFSI causes anodic pitting corrosion of the aluminum current collector above 3.6 V vs. Na\/Na+. Keeping NaPF6 as the majority salt (0.8M) forms an impermeable, passivating AlF3 surface layer. The flexible, inorganic-rich decomposition products of FSI- (Na2S2O4, Na2S, NaF) lower the charge-transfer resistance (R_ct) at the hard carbon surface, preventing sodium metal plating during high-rate charging (\u0026gt;3C).  (2) \u003cstrong\u003eFEC Content Ceiling\u003c\/strong\u003e: Unlike layered oxides where FEC causes harmful transition metal crossover, polyanion full cells tolerate FEC better. However, in ultra-long-cycling cells (\u0026gt;3,000 cycles), excess FEC (\u0026gt;5 wt%) will continuously degrade and release CO2 gas, causing pouch cell swelling. Keep FEC strictly between 1.0 and 2.0 wt% for NVP\/NFPP (3.4 V cutoff) and 2.5–3.5 % for NVPF (4.2 V cutoff). (3) \u003cstrong\u003eEther Electrolytes for NVP\/\/HC (High-Power Alternative)\u003c\/strong\u003e: If the application prioritizes ultra-high power, low-temperature performance (down to -40°C), and cycle life (\u0026gt;6,000 cycles) over high-temperature storage. \u003c\/p\u003e\n\u003ctable style=\"width: 100%; height: 118.6px;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 36.7054%; height: 35.6px;\"\u003e\u003cem\u003ePart Number\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 62.9736%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003eCLCSIBSEPCHC (C-LCSIB-SE-PCHC)\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: 36.7054%; height: 35.6px;\"\u003e\u003cem\u003eAppearance\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 62.9736%; 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: 27.8px;\"\u003e\n\u003ctd style=\"width: 36.7054%; height: 27.8px;\"\u003e\u003cem\u003eElectrolyte Composition\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 62.9736%; height: 27.8px;\"\u003e\n\u003cp\u003eUndisclosed recipe from leading manufacturer that has been well demonstrated in pilot-scale SIB. \u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 36.7054%;\"\u003e\u003cem\u003eHumidity Level\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 62.9736%;\"\u003e\n\u003cp\u003e\u0026lt;20 ppm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 36.7054%;\"\u003e\u003cem\u003eAcid Level\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 62.9736%;\"\u003e\n\u003cp\u003e\u0026lt;100 ppm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 36.7054%;\"\u003e\u003cem\u003ePerformance\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 62.9736%;\"\u003e\n\u003cp\u003e\u0026gt;90% capacity retention after 1,000 cycles at 1C (2.0–3.6 V) (\u003cspan style=\"color: rgb(255, 42, 0);\"\u003efor reference only\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: 36.7054%; height: 19.6px;\"\u003e\u003cem\u003ePackage Size\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 62.9736%; height: 19.6px;\"\u003e\u003cspan\u003e200 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 specific SIB electrolyte in the glovebox due to its sensitivity to humidity.\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\/aamick\/article-abstract\/9\/51\/44485\/705980\/Hard-Carbon-Wrapped-Na3V2-PO4-3-C-Porous-Composite?redirectedFrom=fulltext\"\u003e\u003cspan\u003eL. Cheng, et al. Hard Carbon Wrapped Na3V2(PO4)3@C Porous Composite Extending Cycling Lifespan for Sodium-Ion Batteries, ACS Appl. Mater. Interfaces (2017) 9 (51): 44485–44493.\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003ca href=\"https:\/\/pubs.rsc.org\/ee\/article\/18\/5\/2216\/849066\/Integrated-polyanion-layered-oxide-cathodes\"\u003eZ. Zou, et al. Integrated polyanion-layered oxide cathodes enabling 100 000 cycle life for sodium-ion batteries, Energy Environ. Sci. (2025) 18 (5): 2216–2230.\u003c\/a\u003e \u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"SZKJ","offers":[{"title":"Default Title","offer_id":48315685732582,"sku":"CLCSIBSEPCHC","price":349.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CLCSIBSEPCHC_main.jpg?v=1789071239","url":"https:\/\/echemsupplies.com\/products\/clcsibsepchc","provider":"EChem Supplies","version":"1.0","type":"link"}