According to the calculation of GGII

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At the same time, the neutralization speed between them cannot keep up with the migration speed of electrons in the external circuit. Under the effect of this "fast outside but slow inside", electrons begin to accumulate on the electrode, which causes the electrode potential to deviate from the equilibrium potential, which is known as polarization.



The accumulation of polarization phenomenon causes problems such as lithium deposition, capacity loss and heating in the negative electrode, which limits the development of fast charging. At present, there are three targeted solutions: secondary granulation, surface carbon coating and silicon-carbon negative electrodes.

The function of conductive additives is to collect microcurrents between active materials and between active materials and conductors to reduce the contact resistance of electrodes and accelerate the costa rica number data flow speed of electrons. At present, carbon conductive agents can be divided into five types: conductive graphite, conductive carbon black, chopped carbon fiber, carbon nanotubes and graphene. The mixture of conductive additives with carbon black and carbon nanotubes is the most ideal form of use. According to GGII, in 2021, conductive carbon black accounts for 60% of the conductive agents for power batteries in my country, carbon nanotubes account for 27%, graphene and conductive graphite account for 8% and 4%, respectively.