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Preparation method of additive for electrolytic copper foil, product and application thereof

A technology of electrolytic copper foil and additives, applied in the direction of electrolysis, electroforming, etc., can solve the problems of increasing the crystallization density of grains, reducing the roughness of electrolytic copper roughness, and unsatisfactory problems, so as to increase the crystal density and reduce the roughness. Surface roughness, the effect of increasing the tensile strength

Active Publication Date: 2011-11-30
安徽华威铜箔科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent "200710200119.3" discloses an organic additive for the preparation of electrolytic copper foil. ~3g / L, cellulose 1~5g / L, diisopropanolamine 2~10ml / L, its function is to reduce the roughness of electrolytic copper roughness, increase the crystallization density of grains, and increase the tensile strength, Peel strength, which is mainly suitable for current production above 8500A, and needs to be used in combination with complex processes and specific electrolytes, especially failing to meet the requirements for manufacturing ultra-thin electrolytic copper foil with a thickness of 6 μm

Method used

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  • Preparation method of additive for electrolytic copper foil, product and application thereof

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Embodiment 1

[0030] A method for preparing an additive for electrolytic copper foil provided by the invention comprises the following process steps:

[0031] (1) Weighing: Weigh 100mg thiourea, 500mg polyethylene glycol, 50mg 3-(benzothiazole-2-mercapto)-propanesulfonate sodium, 100mg gloss additive;

[0032] (2) Dissolving: Add the weighed thiourea, polyethylene glycol, 3-(benzothiazole-2-mercapto)-propanesulfonate sodium, The gloss additive was heated at a constant temperature of 45°C, stirred for 60 minutes, and fully dissolved to obtain a mixed solution;

[0033] (3) Dilution: dilute the mixed liquid in step (2) to 10 L with water to obtain an additive for electrolytic copper foil.

[0034] The gloss additive is a fluorocarbon surfactant, specifically: anionic, cationic, nonionic, and amphoteric fluorocarbon surfactants. In this embodiment, an ethoxylated nonionic fluorocarbon surfactant is selected.

Embodiment 2

[0036] (1) Weighing: Weigh 200mg thiourea, 1000mg polyethylene glycol, 100mg 3-(benzothiazole-2-mercapto)-propanesulfonate sodium, 200mg nonionic fluorocarbon surfactant;

[0037] (2) Dissolving: Add the weighed thiourea, polyethylene glycol, 3-(benzothiazole-2-mercapto)-propanesulfonate sodium, The non-ionic fluorocarbon surfactant was heated at a constant temperature of 45°C, stirred for 60 minutes, and fully dissolved to obtain a mixed solution;

[0038] (3) Dilution: dilute the mixed liquid in step (2) to 10 L with water to obtain an additive for electrolytic copper foil.

Embodiment 3

[0040] (1) Weighing: Weigh 300mg thiourea, 1500mg polyethylene glycol, 150mg 3-(benzothiazole-2-mercapto)-sodium propanesulfonate, 300mg nonionic fluorocarbon surfactant;

[0041] (2) Dissolving: Add the weighed thiourea, polyethylene glycol, 3-(benzothiazole-2-mercapto)-propanesulfonate sodium, The non-ionic fluorocarbon surfactant was heated at a constant temperature of 45°C, stirred for 60 minutes, and fully dissolved to obtain a mixed solution;

[0042] (3) Dilution: dilute the mixed liquid in step (2) to 10 L with water to obtain an additive for electrolytic copper foil.

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Abstract

The invention provides a preparation method of an additive for an electrolytic copper foil, which comprises the following steps of: respectively weighing thiocarbamide, polyethylene glycol, 3-(benzothiazole-2-thiol)-sodium sulfopropyl and gloss additive according to a weight percentage of 1:5:0.5:1, then heating in 3L of de-ionized water at a constant temperature of 45 DEG C, dissolving while stirring for 60min, and then diluting with water to 37L to obtain the additive for electrolyzing a copper foil. The invention also provides the` additive for the electrolytic copper foil, which is used for preparing a cathode current collector of a 6 mu lithium ion battery. For the copper foil prepared by using the additive, the rough-surface roughness Rz is less than 2 mu m, the polished-surface roughness Ra is less than 0.35 mu m, the thickness is 6+ / -1 mu m, the surface density is 57+ / -1.5g / m<2>, the hydrophilicity is more than 35, the normal-temperature tensile strength is more than 30kg / mm<2>, and the normal-temperature extensibility is more than 2%.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to an additive for preparing an electrolytic copper foil of a negative electrode collector of a lithium ion battery and a preparation method thereof. Background technique [0002] As an electronic basic material, electrolytic copper foil is mainly used on printed circuit boards (PCBs). However, with the successful development of lithium-ion batteries by Sony in the early 1990s, another use of electrolytic copper foil is lithium-ion negative electrode current collectors. Lithium-ion batteries are mainly used in electronic products such as notebook computers, mobile phones, digital cameras, and MP3 players. At present, lithium batteries have gradually expanded to the fields of electric bicycles and electric vehicles. The development of new energy vehicles has been mentioned to an unprecedented height by various countries. The thickness is required to be less than 10μ to increase th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D1/04C25D3/38
Inventor 陈韶明
Owner 安徽华威铜箔科技有限公司
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