Conductive agent is used to ensure that the electrode has good charge and discharge performance. A certain amount of conductive material is usually added during the production of the electrode plate, which plays the role of collecting micro-current between the active material and between the active material and the fluid collector, so as to reduce the contact resistance of the electrode and accelerate the movement rate of electrons, and also effectively improve the migration rate of lithium ion in the electrode material, thus improving the charge and discharge efficiency of the electrode.