Dramatically reducing surface tension to improve wetting of electrode sheets and separatorsConventional carbonate electrolytes for lithium-ion batteries suffer from high surface tension, leading to insufficient wetting on porous electrode plates and microporous separators, which further triggers multiple defects such as dry spots inside battery cells, inconsistent charge-discharge performance and excessive polarization. Possessing an amphiphilic structure composed of hydrophobic perfluorocarbon chains and hydrophilic functional groups, 1630 fluorocarbon surfactant can rapidly align directionally at the electrolyte interface and cut the electrolyte surface tension from 35–40 mN/m down to 18–22 mN/m. This remarkably accelerates the infiltration and diffusion rate of electrolyte, achieves full and uniform wetting across electrode sheets and separators, eliminates risks of partial electrolyte shortage in cells, and improves battery capacity utilization as well as charge-discharge uniformity.

Superior electrochemical stability compatible with high-voltage lithium battery systemsDifferent from conventional hydrocarbon surfactants, the fluorocarbon skeleton of 1630 has low electron cloud density and extremely strong chemical bond energy, with its resistant electrochemical oxidation voltage exceeding 5.5 V, far above the operating voltage of mainstream nickel-cobalt-manganese ternary and lithium iron phosphate power batteries. It remains chemically inert without decomposition or impurity generation during repeated charge-discharge cycles and high-voltage polarization, and causes no damage to the stability of electrolyte solvents and lithium salts. It effectively prevents gas evolution induced by electrolyte oxidative decomposition and subsequent cell bulging, fitting the application requirements of high-voltage power lithium batteries and energy storage lithium batteries.

Modulating SEI film structure to extend battery cycle lifespan1630 fluorocarbon surfactant participates in film-forming reactions on anode surfaces; trace fluorine elements are uniformly doped into the passivating SEI film to form a denser, thinner and more stable film layer. The optimized SEI layer effectively inhibits persistent side reactions between electrolyte and anode active materials, curtails lithium salt consumption and electrode corrosion, lowers interfacial impedance, boosts lithium-ion intercalation/deintercalation efficiency, and prominently enhances the cycle life under high and low temperatures as well as rate capability of batteries.

Foam suppression and salt precipitation inhibition for enhanced electrolyte system stabilityTiny bubbles tend to form during electrolyte preparation and liquid injection, and slight lithium salt crystallization may occur after long-term storage. With excellent foam inhibiting and anti-crystallization capabilities, 1630 fluorocarbon surfactant eliminates residual microbubbles to maintain homogeneous and transparent electrolyte systems. It avoids increased internal resistance and partial short-circuit hazards derived from bubbles and precipitated salts, raising production yield and long-term storage stability of finished lithium-ion batteries.