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Porous copper current collector, preparation method thereof and application of porous copper current collector in zinc/sodium ion battery

A zinc-ion battery and current collector technology, which is applied in secondary batteries, electrode carriers/current collectors, circuits, etc., can solve the problems of excessive use of metal zinc, large volume, and low Coulombic efficiency, and achieve uniform deposition and growth effects

Pending Publication Date: 2022-04-05
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of uncontrollable growth of zinc dendrites, low coulombic efficiency, excessive use of metal zinc, low energy density, and large volume in the prior art, the purpose of the present invention is to provide a porous copper current collector and its preparation method and in Application in zinc / sodium ion batteries, the porous copper current collector provided by the invention can induce the uniform deposition of metal zinc, and improve the deposition and stripping efficiency of zinc

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  • Porous copper current collector, preparation method thereof and application of porous copper current collector in zinc/sodium ion battery
  • Porous copper current collector, preparation method thereof and application of porous copper current collector in zinc/sodium ion battery
  • Porous copper current collector, preparation method thereof and application of porous copper current collector in zinc/sodium ion battery

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Embodiment approach

[0028] A typical embodiment of the present invention provides a method for preparing a porous copper current collector, which is obtained by using a bronze alloy as a precursor in an acidic solution by electrochemical dealloying;

[0029] The acidic solution is one or a mixture of two or more of hydrochloric acid, acetic acid, sulfuric acid, citric acid, and oxalic acid;

[0030] The concentration of the acidic solution is 0.01~5mol L -1 .

[0031] The bronze alloy of the present invention is used as a raw material, and is prepared by an electrochemical dealloying method under acidic conditions, which can regulate the microscopic appearance and tin content in the bronze alloy, thereby inducing the uniform deposition of metal zinc and improving the deposition and stripping efficiency of zinc . In addition, the present invention adopts specific acid and concentration to ensure the control of tin content in the porous copper current collector.

[0032] Among them, the pickling...

Embodiment 1

[0048]A kind of preparation method of porous copper current collector:

[0049] Take a 2cm*2cm piece of bronze and dip it into 0.125moL L -1 Hydrochloric acid solution, using electrochemical dealloying method, the current density is 1mA cm -2 , the time is 2h. After the reaction is completed, the porous copper-based current collector can be prepared after washing with deionized water and drying.

[0050] Battery assembly: the above product is used as a current collector, the negative electrode is made of zinc foil, the electrolyte is made of 2M zinc sulfate aqueous solution, and the diaphragm is made of glass fiber.

[0051] The parameters for testing Coulombic efficiency are: the discharge current is 0.5mA, the discharge time is 1h, the charge current is 0.5mA, and the charge voltage is 0.5V.

[0052] The parameters of the test cycle are: the charge and discharge current is 0.5mA, and the charge and discharge time is 1h.

[0053] figure 1 The XRD pattern of the porous cop...

Embodiment 2

[0059] A kind of preparation method of porous copper current collector:

[0060] Take a 2cm*2cm piece of bronze and dip it into 0.05moL L -1 In the sulfuric acid solution, the electrochemical dealloying method was adopted, and the current density was 0.5mA cm -2 , the time is 4h. After the reaction is completed, the porous copper-based current collector can be prepared after washing with deionized water and drying.

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Abstract

The invention belongs to the technical field of advanced non-ferrous metal materials, and relates to a high-performance copper alloy for electronics, in particular to a porous copper current collector, a preparation method thereof and application of the porous copper current collector in a zinc / sodium ion battery, and the preparation method comprises the following steps: taking bronze alloy as a precursor, and obtaining the porous copper current collector in an acid solution by adopting an electrochemical dealloying method; the acidic solution is one or a mixture of more than two of hydrochloric acid, acetic acid, sulfuric acid, citric acid and oxalic acid; the concentration of the acid solution is 0.01 to 5 mol L <-1 >. The porous copper current collector provided by the invention can induce uniform deposition of metal zinc, and the deposition stripping efficiency of zinc is improved. And after the negative-electrode-free zinc battery is assembled, metal zinc is not used, so that the energy density of the battery can be greatly improved, the volume and the weight of the battery are reduced, and the application range of the battery is widened.

Description

technical field [0001] The invention belongs to the technical field of advanced non-ferrous metal materials, relates to a high-performance copper alloy for electronics, in particular to a porous copper current collector, a preparation method thereof and an application in a zinc / sodium ion battery. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] According to the inventor's research, the defects of the target zinc-ion battery include: 1. Uncontrollable dendrite growth will aggravate the generation of side reactions, resulting in low Coulombic efficiency; 2. During the deposition and stripping process of zinc, a large volume will be generated. Changes will further aggravate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/80H01M10/36C25F3/02
CPCY02E60/10
Inventor 冯金奎安永灵
Owner SHANDONG UNIV
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