PVDF Binder for Li-ion Battery Electrodes

PVDF Binder for Li-ion Battery Electrodes

Polyvinylidene fluoride (PVDF) is a highly non-reactive thermoplastic fluoropolymer produced by the polymerization of vinylidene difluoride. PVDF is a specialty plastic used in applications needing the highest purity, as well as resistance to solvents, acids and hydrocarbons. PVDF is used as piping products, sheet, tubing, films, plate and an insulator for premium wire. PVDF is used in many different areas like in semiconductors, madical and defense industries. One of the important area that PVDF is used is lithium ion batteries as binder.

In lithium ion batteries the binder can be considered as a key component . The major function of the binders in lithium ion batteries is to act as an effective dispersion agent to connect the electrode species together and then steadily adhere them to the current collectors.

PVDF is one of the most commonly binders used for cathode of lithium ion batteries because of its superior electrochemical and thermal stability and good adhesion between the current collectors and electrode films.

By the adhesion between the current collectors and electrode films obtained by PVDF Binder for Li-ion Battery Electrodes the longer cycle life and higher energy density can be obtained at even lower PVDF binder addition. Also the polar functional groups in PVDF binder result in lower internal energy. Long‐term stability can be ensured by the PVDF’s excellent chemical resistance in the aggressive environment of lithium ion batteries, which includes organic carbonates and lithium salts.