Electrode plate and manufacturing method thereof, super-capacitor and lithium ion battery

Abstract

The embodiment of the invention provides an electrode plate and a manufacturing method thereof, a super-capacitor and a lithium ion battery. The electrode plate comprises a current collector, a basicconductive layer positioned on the current collector, and a functional layer positioned on the basic conductive layer, wherein the functional layer is an active layer or a laminated structure of the active layer and a functional conductive layer; when the functional layer is the laminated structure, the number of the active layers is one greater than that of the functional conductive layers, and the active layers and the functional conductive layers are alternately laminated on the basic conductive layer in sequence; except the active layer adjacent to the basic conductive layer, one side, close to the current collector, of each of the functional conductive layers and other active layers in the functional layer comprises a plurality of bulges, and the bulges are embedded into at least onefilm layer, close to one side of the current collector, of the film layer to which the bulges belong and do not penetrate through the current collector. According to the technical scheme provided by the embodiment of the invention, the impedance value of the electrode plate can be obviously reduced, the longitudinal conductivity of the electrode plate is enhanced, and the power characteristic andcycle life of a device are improved.

Description

technical field [0001] The embodiments of the present invention relate to the field of electrochemical technology, in particular to an electrode sheet and a manufacturing method thereof, a supercapacitor, and a lithium-ion battery. Background technique [0002] At present, new energy-related industries represented by lithium-ion batteries have become representatives of high-paying manufacturing industries. In recent years, the energy density of batteries has continued to increase. The energy density of electric vehicle (Electric Vehicle, EV) battery samples has exceeded 300Wh / kg, almost reaching The limit of energy density for liquid batteries. [0003] In the prior art, through research on electrode materials, diaphragms, electrolytes, conductive agents, etc., the process of making batteries is continuously improved, in which the conductivity of the electrode sheet is improved by increasing the thickness of the pole piece or reducing the longitudinal impedance of the pole p...

AI Technical Summary

Problems solved by technology

[0004] In the existing technical scheme, because the thickness of the electrode sheet is inconsistent with the impedance value, it is impossible to reduce the impedance on the basis of increasing the thickness to improve the conductivity of the electrode sheet Performance, thus making batteries with higher energy and higher power density

Images