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Method for electrodepositing metal zinc in ionic liquid with 1,2-dichloroethane as additive

A technology of dichloroethane and ionic liquids, applied in the field of electrodeposited metal zinc, to achieve the effects of wide electrochemical window, improved morphology, and increased content

Active Publication Date: 2020-09-04
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for electrodepositing smooth and smooth metal zinc in ionic liquids containing organic additives to address the defects in the existing technology of electrodepositing metal zinc in ionic liquids

Method used

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  • Method for electrodepositing metal zinc in ionic liquid with 1,2-dichloroethane as additive
  • Method for electrodepositing metal zinc in ionic liquid with 1,2-dichloroethane as additive
  • Method for electrodepositing metal zinc in ionic liquid with 1,2-dichloroethane as additive

Examples

Experimental program
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Effect test

Embodiment 1

[0021] 1. First weigh 4.41 g of 1-butyl-3-methylimidazolium tetrafluoroborate and 0.304 g of zinc tetrafluoroborate and add them to a 250 ml round bottom flask respectively. Seal the water removal device with raw tape and sealing film, the water removal temperature is 110°C, and the water removal time is 12h. After dehydration, place in a glove box filled with nitrogen.

[0022] 2. Use a three-electrode electrolytic cell with a Lujin capillary, use the above solution as the electrolyte, and use high-purity platinum sheets that have undergone electrochemical cleaning, high-purity water cleaning and vacuum drying in sequence as the cathode (the effective area is 0.5cm 2 ), using a zinc sheet that has been sanded, washed with high-purity water and dried naturally as the anode (the effective area is 1cm 2 ), silver / silver trifluoromethanesulfonate as a reference electrode to form an electrodeposition system, fixed in the electrolyte.

[0023] In this embodiment, a high-purity pl...

Embodiment 2

[0030] 1. First weigh 4.24 g of 1-butyl-3-methylimidazolium tetrafluoroborate and 0.304 g of zinc tetrafluoroborate and add them to a 250 ml round bottom flask respectively. Seal the water removal device with raw tape and sealing film, the water removal temperature is 110°C, and the water removal time is 12h. After the dehydration is completed, it is placed in a glove box full of nitrogen, and the amount of 1,2-dichloroethane with a concentration of 0.5mol / L is added to the above-mentioned round bottom flask solution.

[0031] 2. Use a three-electrode electrolytic cell with a Lujin capillary, use the above solution as the electrolyte, and use high-purity platinum sheets that have undergone electrochemical cleaning, high-purity water cleaning and vacuum drying in sequence as the cathode (the effective area is 0.5cm 2 ), using a zinc sheet that has been sanded, washed with high-purity water and dried naturally as the anode (the effective area is 1cm 2 ), silver / silver trifluoro...

Embodiment 3

[0035] 1. First weigh 4.0635 grams of 1-butyl-3-methylimidazolium tetrafluoroborate and 0.304 grams of zinc tetrafluoroborate into a 250-milliliter round-bottomed flask. Seal the water removal device with raw tape and sealing film, the water removal temperature is 110°C, and the water removal time is 12h. After the dehydration is completed, it is placed in a glove box full of nitrogen, and the amount of 1,2-dichloroethane with a concentration of 1mol / L is added to the above-mentioned round bottom flask solution.

[0036] 2. Use a three-electrode electrolytic cell with a Lujin capillary, use the above solution as the electrolyte, and use high-purity platinum sheets that have undergone electrochemical cleaning, high-purity water cleaning and vacuum drying in sequence as the cathode (the effective area is 0.5cm 2 ), using a zinc sheet that has been sanded, washed with high-purity water and dried naturally as the anode (the effective area is 1cm 2 ), silver / silver trifluoromethan...

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Abstract

The invention relates to a method for electrolytic deposition of metal zinc in ionic liquid with 1,2-dichloroethane as an additive. According to the method, zinc tetrafluoroborate is firstly added into 1-butyl-3-methylimidazole tetrafluoroborate, then vacuum heating is carried out to remove water, then 1,2-dichloroethane is added into a solution with water impurities removed, and electroplating liquid is formed; and an electrodeposition reaction is implemented, a cathode is taken out, acetone and ethyl alcohol are sequentially utilized for cleaning, drying is carried out, and metal zinc is obtained. According to the method, 1,2-dichloroethane is adopted as the additive to be added into the ionic liquid. The morphology of the metal zinc in the ionic liquid can be greatly improved, the zincdeposition morphology becomes smooth and level, and the zinc deposition content is increased. In addition, the reason of selecting the ionic liquid of 1-butyl-3-methylimidazole tetrafluoroborate is that the 1-butyl-3-methylimidazole tetrafluoroborate has a wide electrochemical window, excellent electrical conductivity and low viscosity under room temperature. The electroplating liquid is simple incomposition and easy to control.

Description

technical field [0001] The invention belongs to the technical field of electrodeposited zinc metal, in particular to a method for electrodeposited zinc metal in an ionic liquid with 1,2-dichloroethane as an additive. Background technique [0002] my country is the country with the largest zinc reserves. In recent years, my country's zinc production ranks first in the world. Electrodeposition of zinc and zinc alloys has a wide variety of uses. The technology of electrodepositing zinc is widely used to protect steel from corrosion and to develop new chemical energy devices. Traditional zinc electrodeposition baths usually contain cyanide, and zinc chloride baths are formed in cyanide-containing alkaline baths and acids. This electrolyte is highly toxic, highly corrosive, and seriously pollutes the environment. In addition, in the traditional zinc electrodeposition, due to the existence of hydrogen evolution reaction, hydrogen embrittlement and other problems affecting the q...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/66
CPCC25D3/665
Inventor 吴新虎周尉成旦红
Owner SHANGHAI UNIV