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Production method of copper-zinc alloy foil for preventing lithium dendrite arm from being produced by lithium ions

A production method and technology of alloy foil, applied in the direction of electrode carrier/current collector, electrical components, battery electrodes, etc., can solve safety problems, combustion, explosion and other problems, and achieve the effect of improving distribution and reducing explosions

Inactive Publication Date: 2018-11-27
青岛昊月鑫电子材料有限公司
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AI Technical Summary

Problems solved by technology

[0004] Generally speaking, the safety problems of lithium-ion batteries are manifested as burning or even explosion. , extrusion, puncture, short circuit and other issues will also lead to safety issues

Method used

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Embodiment Construction

[0019] A copper-zinc alloy foil production method that prevents lithium ions from producing lithium dendrites mainly uses electroless deposition of metal zinc, so that metal lithium can form a solid solution with zinc atoms in advance, thereby greatly reducing the deposition interface energy between metal lithium and a current collector.

[0020] The method steps include: pickling, mixing analytically pure sulfuric acid with reverse osmosis water, hydrogen ions in the solution are 90g / L, and completely washing away copper oxide; washing, washing with atomizing nozzles, and cleaning to ensure no acid residue ;Copper-zinc alloy foil uses electrolyte: zinc sulfate 11g / L, sodium hydroxide 130g / L, potassium pyrophosphate 80g / L, add reverse osmosis water and stir with a stirrer, pass precision filtration, heat 30 degrees, PH13; By adding deposited zinc organic complexing agent MNX-2011 complexing agent 100ml / L, main light agent 3ml / L, softener 5ml / L, auxiliary agent 15ml / L, the reduc...

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Abstract

The invention discloses a production method of a copper-zinc alloy foil for preventing a lithium dendrite arm from being produced by lithium ions and belongs to the technical field of copper foil electrolysis. The method comprises the steps of carrying out acid pickling, washing, electric deposition, zinc deposition, washing and passivating, extruding and drying; a lithium dendrite arm copper-zincalloy foil of a lithium-ion battery can be prevented from being produced; zinc atom defects which are uniformly distributed in a current collector of the copper-zinc alloy foil can be used as induction crystal seeds to deposit metal lithium for nucleation, so that the distribution of the lithium ions on the surface of the current collector can be effectively improved; a zinc-layer crystal in thecopper-zinc alloy foil has tight and uniform tissue and the tissues are distributed orderly; the thickness is uniform and the deviation is less than 0.01mum; and the adhesive force is good, and the tensile strength and the elongation percentage reach utilization standards of the lithium-ion battery; and the copper-zinc alloy foil has good surface weldability and good high temperature resistance and corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of copper foil processing and production, and in particular relates to a production method of copper-zinc alloy foil for preventing lithium ions from generating lithium dendrites. Background technique [0002] With the popularity of mobile phones, digital products, and electric vehicles, lithium-ion batteries play an increasingly important role in people's lives. Use problems such as low energy density and limited cycle life are often criticized by people, but compared with these problems, battery safety is the focus of attention. [0003] In recent years, accidents caused by battery safety problems abound, and the consequences of many problems are shocking, such as the lithium battery fire incident of the Boeing 787 "Dream" airliner that shocked the industry, and the large-scale battery fire and explosion incident of Samsung Galaxy Note 7. The safety issue of lithium-ion batteries sounded the alarm again. ...

Claims

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Application Information

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IPC IPC(8): C25D3/22C25D7/06C25D5/48H01M4/66
CPCC25D3/22C25D5/48C25D7/0614H01M4/667Y02E60/10
Inventor 刘冰刘晓
Owner 青岛昊月鑫电子材料有限公司
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