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Cathode roller electrolytic polishing liquid and polishing method

An electrolytic polishing and cathode roller technology, applied in the field of titanium cathode roller polishing, can solve the problems of time-consuming and laborious, and achieve the effects of good thickness uniformity, prolonging service life, and increasing tensile strength and elongation.

Inactive Publication Date: 2018-04-20
XIAN TAIJIN INDAL ELECTROCHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the cathode roller is polished by grinding after running for a period of time. This method is time-consuming and laborious, and requires special grinding equipment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] 1) Preparation of electrolytic polishing solution: NH 4 HF 2 、HNO 3 The solutions are mixed, and the NH in the mixture 4 HF 2 The concentration is 80g / L, HNO 3 The concentration is 20ml / L.

[0009] 2) After the titanium cathode roller is cleaned and degreased, it is placed in an electrolytic polishing solution, and polished at 20° C. and a voltage of 50 V for 5 minutes.

Embodiment 2

[0011] 1) Preparation of electrolytic polishing solution: NH 4 HF 2 、H 2 SO 4 The solutions are mixed, and the NH in the mixture 4 HF 2 The concentration is 50g / L, the H in the mixture 2 SO 4 The concentration is 10ml / L;

[0012] 2) After the titanium cathode roller is cleaned and degreased, it is placed in an electrolytic polishing solution, and polished at 30° C. and a voltage of 40 V for 5 minutes.

Embodiment 3

[0014] 1) Preparation of electrolytic polishing solution: NH 4 HF 2 、NaNO 3 、HNO 3 The solutions are mixed, and the NH in the mixture 4 HF 2 The concentration is 50g / L, NaNO 3 The concentration is 20g / L, HNO 3 The concentration is 18ml / L;

[0015] 2) After the titanium cathode roller is cleaned and degreased, it is placed in an electrolytic polishing solution, and polished at 40° C. and a voltage of 30 V for 4 minutes.

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Abstract

The invention discloses cathode roller electrolytic polishing liquid and a polishing method. The electrolytic polishing liquid is formed by mixing two or more of the NH4HF2 solution, the NaNO3 solution, the HNO3 solution, the H2SO4 solution and the (CH2OH)2 solution, wherein the concentration of the NH4HF2 in mixed liquid ranges from 20 g / L to 100 g / L, the concentration of the NaNO3 in the mixed liquid ranges from 10 g / L to 50 g / L, the concentration of the HNO3 in the mixed liquid ranges from 10 ml / L to 20 ml / L, the concentration of the H2SO4 in the mixed liquid ranges from 10 ml / L to 20 ml / L,and the concentration of the (CH2OH)2 in the mixed liquid ranges from 5 ml / L to 10 ml / L. The cathode roller electrolytic polishing method comprises the steps that after a titanium cathode roller is cleaned and subjected to oil removal, the titanium cathode roller is placed in the electrolytic polishing liquid, and polishing is conducted for 3-5 min at the temperature of 20-50 DEG C and at the voltage of 20-50 V. According to the cathode roller electrolytic polishing liquid and the polishing method, operation is simple and convenient, the surface of the polished titanium cathode roller is bright and clean and has the mirror surface reflection effect, manufactured electrolytic copper foil has the beneficial effects of being small in thickness, fine and dense in crystal and easy to peel, theactually-measured copper foil thickness delta is smaller than or equal to 10 microns, and the lithium battery production requirement can be met. The thin copper foil excellent in performance is usedin a lithium battery, cost can be reduced, and meanwhile higher energy density can be provided.

Description

technical field [0001] The invention relates to a polishing method for a titanium cathode roller, in particular to an electrolytic polishing solution and a polishing method for a cathode roller. Background technique [0002] Titanium cathode roll is the core component of electrolytically manufactured copper foil. Titanium cathode roll is continuously corroded during the electrolytic production of copper foil. The oxide film on the surface of the cathode roll gradually thickens and the roughness continues to increase, resulting in copper ions on the surface of the cathode roll. The crystals are coarse and require regular polishing. At present, the cathode roller is polished by grinding after running for a period of time, which is time-consuming and labor-intensive, and requires special grinding equipment. Contents of the invention [0003] The object of the present invention is to provide a cathode roller electrolytic polishing solution and a polishing method which are sim...

Claims

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Application Information

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IPC IPC(8): C25F3/26
CPCC25F3/26
Inventor 张玉萍方媛任鹏徐尚元张苓唐飞飞
Owner XIAN TAIJIN INDAL ELECTROCHEM TECH