Three-dimensional current collector/Zn/Zn-E composite negative electrode, preparation thereof and application of composite negative electrode in aqueous zinc ion battery

A current collector, three-dimensional technology, applied in the direction of electrode carrier/current collector, battery electrode, secondary battery, etc., can solve the problems of dendrite zinc body utilization, zinc body side reactions, hydrogen evolution corrosion, etc., to improve the electrochemical reaction Rate, Utilization Improvement, Effect of Utilization Improvement

Pending Publication Date: 2022-08-09
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the dendrite problem of the negative electrode material of the water-based zinc ion battery and the low utilization rate of the zinc body of the current three-dimensional current collector / zinc composite negative electrode, and the side reactions and hydrogen evolution corrosion caused by the zinc body being exposed to the electrolyte, the first method of the present invention The purpose is to provide a three-dimensional current collector / Zn / Zn-E composite negative electrode, aiming to provide a zinc negative electrode with high utilization rate of zinc body and stable cycle

Method used

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  • Three-dimensional current collector/Zn/Zn-E composite negative electrode, preparation thereof and application of composite negative electrode in aqueous zinc ion battery
  • Three-dimensional current collector/Zn/Zn-E composite negative electrode, preparation thereof and application of composite negative electrode in aqueous zinc ion battery
  • Three-dimensional current collector/Zn/Zn-E composite negative electrode, preparation thereof and application of composite negative electrode in aqueous zinc ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0096] (1) Three-dimensional current collector copper mesh (pore size 0.1-1 mm, porosity 90%, thickness 0.5 mm) was pretreated, the copper mesh was placed in a 0.1M HCl solution for acidification for 3 minutes to obtain uniform nucleation sites, and then It was ultrasonically cleaned with deionized water for 5 minutes to remove the HCl solution and dried at room temperature; the acidified three-dimensional current collector was cut out to a size of 4.5 × 3.5 cm as the cathode

[0097] (2) Equipped with zinc bulk layer deposition electrolyte I, equipped with 0.5M zinc sulfate, 0.2M sodium sulfate, 0.5M sodium chloride aqueous solution;

[0098] Equipped with 0.4M zinc sulfate, 0.15M sodium phosphate, 0.08M boric acid, 0.28M sodium sulfate, 0.34M sodium chloride, 0.006M ethylenediaminetetraacetic acid aqueous solution as plating electrodeposition electrolyte II;

[0099] (3) The zinc foil is used as the anode, the three-dimensional current collector treated in the step (1) is th...

Embodiment 2

[0107] (1) Three-dimensional current collector copper mesh (pore size 0.1-1 mm, porosity 90%, thickness 0.5 mm) was pretreated, the copper mesh was placed in a 0.1M HCl solution for acidification for 3 minutes to obtain uniform nucleation sites, and then It was ultrasonically cleaned with deionized water for 5 minutes to remove the HCl solution and dried at room temperature; the acidified three-dimensional current collector was cut out to a size of 4.5 × 3.5 cm as the cathode

[0108] (2) Equipped with zinc body layer deposition electrolyte I, equipped with 0.3M zinc sulfate, 0.3M sodium sulfate, 0.8M sodium chloride aqueous solution;

[0109] Equipped with 0.1M zinc sulfate, 0.1M sodium phosphate, 0.01M boric acid, 0.1M sodium sulfate, 0.1M sodium chloride, 0.001M ethylenediaminetetraacetic acid aqueous solution as plating electrodeposition electrolyte II;

[0110] (3) The zinc foil is used as the anode, the three-dimensional current collector treated in the step (1) is the c...

Embodiment 3

[0114] (1) Three-dimensional current collector copper mesh (pore size 0.1-1 mm, porosity 90%, thickness 0.5 mm) was pretreated, the copper mesh was placed in a 0.1M HCl solution for acidification for 3 minutes to obtain uniform nucleation sites, and then It was ultrasonically cleaned with deionized water for 5 minutes to remove the HCl solution and dried at room temperature; the acidified three-dimensional current collector was cut out to a size of 4.5 × 3.5 cm as the cathode

[0115] (2) Equipped with zinc bulk layer deposition electrolyte I, equipped with 0.5M zinc sulfate, 0.2M sodium sulfate, 0.5M sodium chloride aqueous solution;

[0116] Equipped with 1M zinc sulfate, 0.5M sodium phosphate, 0.1M boric acid, 0.5M sodium sulfate, 1M sodium chloride, 0.01M ethylenediaminetetraacetic acid aqueous solution as plating electrodeposition electrolyte II;

[0117] (3) The zinc foil is used as the anode, the three-dimensional current collector treated in the step (1) is the cathode...

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Abstract

The invention belongs to the technical field of aqueous zinc ion batteries, and particularly discloses a three-dimensional current collector / Zn / Zn-E composite negative electrode which comprises a three-dimensional current collector substrate, a zinc body layer deposited on the surface of the three-dimensional current collector substrate and a Zn-E alloy layer deposited on the zinc surface. In addition, the invention also discloses a preparation method of the negative electrode and an application method of the negative electrode in an aqueous zinc ion battery. The composite zinc negative electrode has high utilization rate, the energy density of the battery is greatly improved, and the assembled aqueous zinc ion total battery has excellent cycle and rate performance. In addition, the preparation method is simple, efficient and low in cost, and further application of the water-based zinc ion battery is promoted.

Description

technical field [0001] The invention belongs to the technical field of electrochemical energy, and in particular relates to the technical field of water-based zinc battery materials. Background technique [0002] Compared with traditional lithium-ion batteries, aqueous zinc-ion batteries have high safety performance and low cost, and gradually become a new generation of energy storage devices. However, due to the main problems of zinc dendrite, hydrogen evolution corrosion, and side reactions in the zinc metal anode, the further development of aqueous zinc-ion batteries is limited. Among them, the hydrogen evolution overpotential of zinc is relatively large, and the hydrogen evolution corrosion is relatively small. At the same time, the zinc activity is relatively low, and the formation trend of side reactions is relatively low. Therefore, among these essential problems, the formation of zinc dendrites is the main problem that limits the further application of aqueous zinc-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/42H01M4/78H01M4/02H01M4/04H01M10/36
CPCH01M4/02H01M4/0452H01M4/42H01M4/78H01M4/628H01M10/36H01M2004/027H01M2300/0002Y02E60/10
Inventor 杨娟曹鹏辉周向阳刘卫平杨岳云唐晶晶刘敏
Owner CENT SOUTH UNIV
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