Production method for lithium ion current collector copper-nickel alloy foil

Abstract

The invention discloses a production method for a lithium ion current collector copper-nickel alloy foil. The method is characterized by comprising the following steps of: depositing an electrolytic copper foil by a special anode plate; adopting titanium-coated iridium as an electrolytic anode plate; pickling the lithium copper foil to eliminate the influence of copper oxide on the surface of theelectrolytic copper foil; conducting cleaning with RO membrane reverse osmosis water, and conducting cleaning through an atomizing nozzle; mixing analytically pure nickel sulfate and analytically pureboric acid to prepare a pure nickel sulfate solution as an electrolyte; and diluting the solution by RO membrane plasma water. Due to the adoption of the process method, the production method provided by the invention effectively solves phenomenon that the lithium ion current collector is broken during the charging and discharging process; and a nickel layer deposited by the lithium ion current collector has compact and uniform crystal structure, neat distribution, and uniform thickness deviation of less than 0.01 [mu]m; and the lithium ion current collector copper-nickel alloy foil has tensile strength and elongation reaching the use standard of the lithium ion battery, excellent surface weldability, good conductivity, high temperature resistance and excellent corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of electrolytic copper foil production, and in particular relates to a production method of copper-nickel alloy foil of a lithium ion current collector. Background technique [0002] In recent years, with the improvement of the cruising range of new energy vehicles and the development of long-time working hours of aircraft models, electric tools and electric toys, the requirements for the rate discharge performance of lithium-ion batteries are also getting higher and higher. It is difficult for the battery to achieve continuous discharge at a rate above 20C. The main reason is that when the battery is discharged at a high rate, the lithium-ion battery generates serious heat, and the overall temperature of the battery is too high, which makes the battery prone to thermal runaway and damages the lithium-ion current collector, resulting in The rate discharge performance and cycle performance of the battery dete...

AI Technical Summary

Problems solved by technology

Therefore, how to make the electrons collected by the current collector output in a safe manner, and at the same time ensure that the electrolyte of the lithium-ion battery does not corrode the pole piece and the pole piece breaks when the lithium-ion battery is charged and discharged, is costly and battery safety. there are certain problems

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