Magnesium electrode for magnesium battery and preparation method thereof

A technology of magnesium electrodes and magnesium batteries, applied in battery electrodes, electrode manufacturing, active material electrodes, etc., can solve the problems of weak matrix bonding, the appearance of passivation films, unsuitable high current discharge, etc., to achieve easy high current discharge, Good quality and good discharge performance

Inactive Publication Date: 2011-03-30
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the existing magnesium electrode is not very firmly bonded to the substrate, and a passivation film will appear on the surface, which is not suitable for high-current discharge.

Method used

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  • Magnesium electrode for magnesium battery and preparation method thereof
  • Magnesium electrode for magnesium battery and preparation method thereof
  • Magnesium electrode for magnesium battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. Ultrasonic cleaning of the base material nickel foam in acetone solution, just clean it;

[0034] 2. Electroplating the copper layer on the bottom layer of the base material, the electroplating conditions are about 55°C, and the current density is 15mA / cm 2 , plating time is 3min.

[0035] Among them: the formula of copper electroplating solution: potassium pyrophosphate 350g / L, ammonium nitrate 20g / L, copper sulfate 90g / L, pH value is controlled at 8.2-8.8.

[0036] 3. Electrodeposition of magnesium on the surface of the base material, constant current electrodeposition, the current density is 1.0mA·cm -2 , The electrodeposition time is 1h.

[0037] The electrode area of ​​the electrode substrate is 0.26cm 2 , both the counter electrode and the reference electrode use magnesium strips (purity 99.99%), and the electrolyte is 1.0M EtMgBr / THF solution, thus obtaining a magnesium electrode with a double-layer structure, and its surface morphology is as follows figur...

Embodiment 2

[0042] The base material is copper foil, and the electrodeposition of magnesium is directly carried out.

[0043] All the other are identical with embodiment 1.

[0044] Repeat the above test, the results are recorded in Table 1, the surface SEM image is as follows figure 2 b) as shown.

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Abstract

The invention relates to a magnesium electrode for a magnesium battery and a preparation method thereof, which belong to the technical field of magnesium batteries. The magnesium electrode preparation method comprises the following steps of: depositing an electrode material in a dual-layer structure on a base material, wherein the base layer is a copper layer, and the surface layer is a magnesiumor magnesium alloy layer; adopting an electroplating method for preparing a copper transition layer, and then electrodepositing magnesium in THF (Tetrahydrofolic Acid) solution of Grignard reagents. The dual-layer magnesium electrode prepared via the electrodepositing method in the invention has the advantages of firm and compact combination of the magnesium layer and the base material, good discharge performance and the like, in addition, the electrode surface does not have passive films, and magnesium plating layers have good quality.

Description

technical field [0001] The invention belongs to the technical field of batteries, and relates to a magnesium battery, in particular to a magnesium electrode for a magnesium battery and a preparation method thereof. Background technique [0002] Magnesium metal is rich in resources, low in price, friendly to the environment, has low density, negative electrode potential, and large theoretical specific capacity (2205mAh·g -1 ) characteristics. As a new type of green chemical power source, magnesium battery also has the characteristics of high specific energy, safety, and no pollution. It is considered to be one of the ideal replacement products for replacing traditional batteries in the future. However, the traditional magnesium electrode is prepared by calendering, and the surface has a very thick passivation film, which reduces the utilization rate of magnesium, and there is a voltage hysteresis phenomenon during discharge; although the passivation film on the surface is su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/02H01M4/62H01M4/66H01M4/04
CPCY02E60/12Y02E60/10
Inventor 刘兴江郑伟伟张晶丁飞徐强
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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