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High-strength electrolytic copper foil, method for producing same, electrode, and secondary battery

A technology of electrolytic copper foil and a manufacturing method, applied in the field of electrolytic copper foil, can solve problems such as copper foil breakage, and achieve the effects of preventing tearing or wrinkling, excellent strength and elongation, and high charge and discharge capacity

Pending Publication Date: 2022-04-12
SK NEXILIS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the charge / discharge cycle of the secondary battery is repeated, the negative electrode current collector shrinks / expands, and the copper foil may break at this time

Method used

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  • High-strength electrolytic copper foil, method for producing same, electrode, and secondary battery
  • High-strength electrolytic copper foil, method for producing same, electrode, and secondary battery
  • High-strength electrolytic copper foil, method for producing same, electrode, and secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 4 and comparative example 1 to 5

[0208] Electrolytic copper foil is manufactured using a foil making machine including an electrolytic cell, a rotating cathode drum disposed in the electrolytic cell, and an anode plate disposed spaced apart from the rotating cathode drum. The electrolyte is copper sulfate solution. The concentration of copper ions in the electrolytic solution was set at 85 g / L, the concentration of sulfuric acid was set at 105 g / L, the average temperature of the electrolytic solution was set at 55° C., and the current density was set at 60 ASD.

[0209] In addition, the presence or absence of carbon filtration, the type and concentration of organic additives contained in the electrolyte, chloride ions (Cl - ) concentrations are shown in Table 1 below.

[0210] In Examples 1 to 4 and Comparative Examples 1, 3, 4, the organic additive was pretreated by carbon filtration before being added to the electrolytic solution. Granular carbon is used in carbon filtration. The added water-soluble organi...

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Abstract

One embodiment of the present invention provides an electrolytic copper foil comprising a copper layer having a (220) plane, the orientation index [M (220)] of the (220) plane being 1 or more. According to one embodiment of the present invention, it is possible to provide an electrolytic copper foil having excellent strength and elongation.

Description

technical field [0001] The present invention relates to an electrodeposited copper foil that is easy to handle in a manufacturing process and is used for improving the capacity retention of a secondary battery, an electrode including the electrodeposited copper foil, a secondary battery including the electrode, and a method for manufacturing the electrodeposited copper foil. Background technique [0002] A secondary battery is a type of energy converter that converts electrical energy into chemical energy and stores it, and then converts chemical energy into electrical energy to generate electricity when electricity is needed. Secondary batteries are not only used in mobile phones, notebooks, etc. Portable household appliances are also used as energy sources for electric vehicles. [0003] As secondary batteries that are economical and environmentally superior to disposable primary batteries, there are lead storage batteries, nickel-cadmium secondary batteries, nickel-hydrog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D1/04H01M4/66H01M10/0525
CPCC25D1/04C25D3/38C25D21/16C25D21/06H01M4/661H01M10/052Y02E60/10H01M4/13H01M4/0435H01M4/134
Inventor 金英泰全相炫金善花李颜娜
Owner SK NEXILIS CO LTD