Film-forming additivesare chemical compounds used as performance enhancing components in lithium-ion batteries.
During the reaction, the material of the electrode together with the electrolyte form an SEI layer covering its surface. The process of discharging and charging a battery takes place as a result of intercalation and disconnection of lithium cations passing through the resulting membrane. The use of film-forming additives ensures better inter-phase properties and uniform deposition of lithium, as a result increasing the efficiency and safety of the product.
There are many types of compounds used in the production of lithium-ion batteries, including: sulphur dioxide (SO2), vinylene carbonate (VC), ethylene sulphite (ES), fluoroethylene carbonate (FEC) or lithium difluorophosphate (LiPO2F2).
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