{"product_id":"cbebpuad","title":"PU (Polyurethane) Aqueous Dispersion as Battery Electrode Binder, 20 g\/bottle, CBEBPUAD","description":"\u003cp\u003eAqueous polyurethane dispersions (PUDs) are emerging as highly effective, environmentally friendly alternative binders to traditional PVDF (polyvinylidene fluoride) for battery electrodes. They offer unique elastomeric properties that are particularly beneficial for next-generation chemistries undergoing large volume changes.\u003c\/p\u003e\n\u003cp\u003ePUDs are binary systems consisting of polyurethane particles dispersed in water. Because polyurethane is naturally hydrophobic, specific chemical modifications are required to make it dispersible in water without settling: (1) \u003cstrong\u003eInternal Emulsifiers\u003c\/strong\u003e: During synthesis, hydrophilic monomers—most commonly DMPA (dimethylolpropionic acid) for anionic dispersions or MDEA (N-methyldiethanolamine) for cationic dispersions—are incorporated into the polyurethane backbone. (2) \u003cstrong\u003eNeutralization\u003c\/strong\u003e: The carboxylic acid groups from DMPA are neutralized with a base (like triethylamine, TEA), creating ionic centers (-COO-HN+Et3) along the polymer chain. (3) \u003cstrong\u003eDispersion\u003c\/strong\u003e: When introduced to water under high shear, these ionic centers orient outward toward the aqueous phase, creating electrostatic repulsion that keeps the PU particles stably suspended without the need for external surfactants (which could degrade electrochemical performance).\u003c\/p\u003e\n\u003cp\u003eCompared to rigid binders like PVDF or standard CMC\/SBR (carboxymethyl cellulose \/ styrene-butadiene rubber) systems, PUDs offer distinct mechanical and processing advantages: (1) \u003cstrong\u003eHigh Elasticity and Toughness\u003c\/strong\u003e: Polyurethane possesses a segmented structure consisting of alternating hard segments (diisocyanates and chain extenders providing mechanical strength) and soft segments (polyols providing flexibility). This gives PUD binders excellent elongation-at-break, allowing the electrode matrix to accommodate severe volume expansion and contraction—such as in silicon-dominant anodes or high-capacity conversion\/alloying materials—without pulverization or delamination. (2) \u003cstrong\u003eExcellent Adhesion\u003c\/strong\u003e: The abundant urethane (-NH-COO-), urea (-NH-CO-NH-), and ionic groups form strong hydrogen and electrostatic bonds with both the current collector (copper\/aluminum) and the active material particles. (3) \u003cstrong\u003eTunable Chemistry\u003c\/strong\u003e: By varying the polyol type (ether, ester, carbonate, or butadiene-based) or the hard-to-soft segment ratio, the binder's mechanical strength, swelling behavior in organic electrolytes, and electrochemical window can be precisely engineered.\u003c\/p\u003e\n\u003ctable style=\"width: 100%; height: 173px;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 32.7338%; height: 35.6px;\"\u003e\u003cem\u003ePart Number\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 67.0863%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003eCBEBPUAD (C-BEB-PUAD)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 11px;\"\u003e\n\u003ctd style=\"width: 32.7338%; height: 11px;\"\u003e\u003cem\u003eCAS\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 67.0863%; height: 11px;\"\u003e\n\u003cp\u003e9009-54-5\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 32.7338%; height: 35.6px;\"\u003e\u003cem\u003eChemical Formula\/Structure\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 67.0863%; height: 35.6px;\"\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CBEBPU_molecular_structure_240x240.png?v=1765911768\"\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 32.7338%; height: 35.6px;\"\u003e\u003cem\u003eAppearance\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 67.0863%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003eMilky White Slurry\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 32.7338%;\"\u003e\u003cem\u003eSolid Content\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 67.0863%;\"\u003e\n\u003cp\u003e\u003cspan\u003e10.5 %\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: 32.7338%; height: 19.6px;\"\u003e\u003cem\u003ePackage Size\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 67.0863%; height: 19.6px;\"\u003e20 g\/bottle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eNotes\u003c\/strong\u003e: Please try to store the PU aqueous dispersion in a dry place.\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:\/\/iopscience.iop.org\/article\/10.1149\/2.0641514jes\/meta\"\u003eN. Loeffler, et al. Polyurethane Binder for Aqueous Processing of Li-Ion Battery Electrodes, J. Electrochem. Soc., 2015, 162, A2692\u003c\/a\u003e.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003ca href=\"https:\/\/pubs.acs.org\/doi\/abs\/10.1021\/acsapm.5c00401\"\u003eX. Liu, et al. Se–Se Bonds Involved Polyurethane-Based Binders for Enhanced Redox Kinetics in Lithium-Ion Batteries, ACS Appl. Polym. Mater. 2025, 7, 6, 4019–4028\u003c\/a\u003e. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"SZKJ","offers":[{"title":"Default Title","offer_id":47944514240742,"sku":"CBEBPUAD","price":189.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CBEBPUAD_main.jpg?v=1783064904","url":"https:\/\/echemsupplies.com\/products\/cbebpuad","provider":"EChem Supplies","version":"1.0","type":"link"}