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Electrolytic foil, electrical component containing electrolyte foil and battery

A technology of electrolytic copper foil and pores, applied in the direction of electrolysis, electroforming, etc., can solve the problems of weak mechanical strength, copper foil thickness limitation, etc., and achieve the effects of high gloss, process reduction, and high elongation

Inactive Publication Date: 2016-10-05
ILJIN MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since thin copper foil is limited in thickness, its mechanical strength is weak, and the frequency of defects such as wrinkles and bends increases when manufacturing printed circuit boards.

Method used

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  • Electrolytic foil, electrical component containing electrolyte foil and battery
  • Electrolytic foil, electrical component containing electrolyte foil and battery
  • Electrolytic foil, electrical component containing electrolyte foil and battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] In order to produce electrolytic copper foil by electrolysis, a 3L capacity electrolytic cell system that can circulate at 20L / min was used, and the temperature of the copper electrolyte was kept constant at 45°C. The anode uses a thickness of 5mm and a size of 10×10cm 2 The DSE (Dimentionally Stable Electrode) plate, the cathode uses a titanium plate with the same size and thickness as the anode.

[0089] To make Cu 2+ Smooth movement of ions at 35A / dm 2 Gold plating was performed at a current density of 18 μm to produce an electrolytic copper foil with a thickness of 18 μm.

[0090] The basic components of copper electrolyte are as follows:

[0091] CuSO 4 ·5H 2 O: 250~400g / L

[0092] h 2 SO 4 : 80~150g / L

[0093] Chloride ions and additives were added to the above-mentioned copper electrolytic solution, and the components of the added additives and chloride ions are shown in Table 1 below. In Table 1 below, ppm is the same concentration as mg / L.

[0094] A...

Embodiment 2 to 4 and comparative example 1 to 4

[0096] Electrolytic copper foil was produced in the same manner as in Example 1 except that the composition of the copper electrolytic solution was changed as shown in Table 1 below. Scanning electron micrographs of the deposition surface of the electrodeposited copper foil produced in Examples 2 to 4 and Comparative Examples 1 to 4 are shown in Figures 8 to 14 .

[0097] 【Table 1】

[0098]

[0099] In the above Table 1, the abbreviations represent the following compounds.

[0100] DET: Diethylthiourea

[0101] SPS: bis-(3-sulfopropyl)-disulfide disodium salt

[0102] MPS: 3-Mercapto-1-propanesulfonic acid

[0103] PEG: polyethylene glycol (kanto chemical Cas No. 25322-68-3)

[0104] ZPS: Sodium 3-(benzothiazolyl-2-mercapto)-propyl-sulfonate

[0105] JGB: Kenna Green B

[0106] 2M-SS: 2-Mercapto-5-benzimidazolesulfonic acid

[0107] DDAC: Diallyldimethylammonium chloride

[0108] PGL: Polyglycerol (KCI, PGL 104KC)

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Abstract

The invention relates to an electrolytic foil, an electrical component containing the electrolytic foil and a battery. The invention provides the electrolytic foil, wherein the average diameter of pores of an area among prominent surface elements of a separating-out surface is 1 nanometer to 100 nanometers. The electrolytic foil shows high elongation rate while maintaining low roughness and high strength, thus being applicable to semiconductor packaging substrates for tape automated bonding used in current collector and tape carrier package of large and medium lithium ion secondary batteries.

Description

technical field [0001] The present invention relates to electrolytic copper foil, electrical components and batteries containing electrolytic copper foil, and more specifically relates to low roughness, high strength and high elongation electrolytic copper foil which also has high tensile strength and elongation after high temperature heat treatment. Background technique [0002] Copper foil is generally used as a current collector of a secondary battery. The above-mentioned copper foil mainly uses a rolled copper foil by a rolling process, but its production cost is high and it is difficult to manufacture a wide copper foil. In addition, the rolled copper foil needs to use lubricating oil during the rolling process, and the contamination of the lubricating oil will reduce the adhesion with the active material, which may reduce the charge-discharge cycle characteristics of the battery. [0003] When charging and discharging a lithium battery, it is accompanied by heat gener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D1/04
Inventor 李先珩赵泰真朴瑟气宋基德
Owner ILJIN MATERIALS CO LTD
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