In the battery, Teflon PTFE is solid or liquid, and the kind of adhesive with a better effect.
CMC solution can produce evaporation of water in the process of pole forming. It can increase the void fraction of the electrode, increase the real surface area of the electrode, effectively reduce the electrochemical polarization, and increase the discharge capacity. From experience, the amount of 60%ptfe emulsion is suitable for 1.5-2.5 parts. The CMC concentration ratio is the most stable at 2%.
The network formed by the PTFE emulsion can accommodate the active material very well, but the amount of the single additive is too large, which will lead to higher impedance and influence the charging and discharging performance. It has been proved by experiment that PTFE emulsion and sodium carboxymethyl cellulose CMC can make up for this shortcoming.
The application of polytetrafluoroethylene PTFE in batteries is 60% solid content of PTFE emulsion. Mainly used in nickel metal hydride, nickel cadmium, super capacitor, fuel cell.
