Conductive adhesive, composite current collector with conductive adhesive, battery and object

Abstract

The invention discloses a conductive adhesive, a composite current collector with the conductive adhesive, a battery and an object, and relates to the technical field of secondary batteries. The conductive adhesive comprises an adhesive and a nano conductive material, and the nano conductive material is linear; and when the conductive adhesive forms a film, the nano conductive materials are mutually lapped to form a net-shaped conductive layer. According to the invention, the linear nano conductive material is added into the adhesive, the adhesive is smeared on the surface of the current collector base material, the nano conductive materials are mutually lapped to form the net-shaped conductive layer after film formation, the surface resistance is small, the conductivity is good, and the subsequent electroplating process is convenient to implement. Meanwhile, the adhesive is deposited in the pores of the reticular conductive layer and is tightly combined with the current collector base material, so that the adhesive force between the current collector base material and the conductive layer can be improved.

Description

technical field [0001] The present application relates to the technical field of secondary batteries, and in particular to a conductive glue and a composite current collector, battery and object with the conductive glue. Background technique [0002] Traditional lithium-ion battery negative electrode current collector is copper foil, positive electrode current collector is aluminum foil. With the development of technology, lithium-ion batteries have higher and higher requirements in terms of energy density, light weight, and flexibility. At present, the minimum thickness of copper foil mass production is 6 microns, and the minimum thickness of aluminum foil is 8 microns. Although the thinning of copper foil and aluminum foil can effectively reduce the weight of lithium-ion batteries and increase the energy density, due to the bottleneck of technical capabilities, the reduction of thickness will lead to a significant decrease in mechanical strength, which is difficult to pro...

AI Technical Summary

Problems solved by technology

[0005] The purpose of this application is to provide a conductive adhesive and a composite current collector and battery with the conductive adhesive to solve the problem of poor adhesion between the existing composite current collector substrate and the conductive layer

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