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Preparation method and application of zinc ion battery metal zinc negative electrode dynamic interface coating

A zinc-ion battery and interface coating technology, which is applied in electrode collector coating, electrode manufacturing, battery electrodes, etc., can solve problems such as low Coulombic efficiency, cycle life attenuation, negative electrode interface volume expansion, etc., and achieve simple and easy raw materials Obtain, improve cycle life, improve the effect of utilization

Active Publication Date: 2021-10-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems of dendrite growth in the zinc metal negative electrode, which causes negative electrode interface volume expansion, low coulombic efficiency and cycle life attenuation, and provides a preparation method and application of the dynamic interface coating for the metal zinc negative electrode of a zinc ion battery

Method used

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  • Preparation method and application of zinc ion battery metal zinc negative electrode dynamic interface coating
  • Preparation method and application of zinc ion battery metal zinc negative electrode dynamic interface coating
  • Preparation method and application of zinc ion battery metal zinc negative electrode dynamic interface coating

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specific Embodiment approach 1

[0026] DETAILED DESCRIPTION OF THE INVENTION First: The present embodiment is a method of preparing a zinc ion battery metal zinc negative electrode dynamic interface coating, the method comprising the steps of:

[0027] Step 1, boric acid is added to dimethyl silicone oil, and mix well at high speed, then adding ferric chloride, catalytic crosslinking under high temperature conditions;

[0028] Step 2, Titanium Dioxide TiO 2 At a temperature of 400 ~ 450 ° C, the argon hydrogen gas volume ratio of 95: 5 is heat-treated to obtain an oxygen-containing defect TiO 2-x ;

[0029] Step three, dissolve the prepared PDMS with volatile ether organic solvent, then add organic salt Zn (TFSI) 2 ;

[0030] Step four, the preparative oxygenate defect TIO 2-x Add to step three solutions, oxygen-containing defect TiO 2-x With the mass ratio of steps of steps of 2% to 15%, high-speed stirring is mixed;

[0031] Step 5. Wash the surface of the zinc foil with sandpaper, then cleaning it with deioni...

specific Embodiment approach 2

[0035] DETAILED DESCRIPTION OF THE INVENTION 2: DETAILED DESCRIPTION OF THE INVENTION A method for preparing a zinc ion battery metal zinc negative electrode dynamic interface coating, in step one, the high temperature condition is 180 ° C ~ 220 ° C, the temperature is too low, and it will not The reaction is too high for the preparation.

specific Embodiment approach 3

[0036] DETAILED DESCRIPTION OF THE INVENTION 3: DETAILED DESCRIPTION OF THE INVENTION A method of preparing a zinc ion battery metal zinc negative electrode dynamic interface coating, wherein the boric acid, dimethyl silicone oil and iron chloride is 0.1 ~ 1g: 1 ml: 0.01g.

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Abstract

The invention discloses a preparation method and application of a dynamic interface coating of a metal zinc negative electrode of a zinc ion battery, and belongs to the technical field of energy materials. The surface of the metal zinc negative electrode of the zinc ion battery is modified with the interface layer dynamically adapting to the interface volume change through a spin coating method, and the synthesized polymer PDMS has extremely high viscoelastic characteristics and shows high dynamic adaptive capacity. And the prepared TiO<2-x> is rich in oxygen vacancies. The prepared dynamic interface coating can be applied to an aqueous zinc ion battery. The PDMS / TiO<2-x> interface coating dynamically adaptive to volume change is prepared, dendritic crystal growth is inhibited through dynamic buffer volume change, and meanwhile, the ionic conductivity of the interface layer is further improved through rapid and uniform transfer of Zn < 2 + > induced by rich oxygen vacancies, so that the Zn metal surface is stabilized, the utilization rate of a battery is increased, and the cycle life of the battery is prolonged.

Description

Technical field [0001] The present invention belongs to the technical field of energy material, and more particularly to the preparation method of metal zinc negative electrode dynamic interface coating of zinc ion battery and its application. Background technique [0002] Today's economy and technology are rapidly advanced, and the society is growing with the benefits of energy. The traditional primary energy reserves such as natural gas, coal and petroleum have gradually depleted, and the direct combustion of fossil fuel has led to deepening the greenhouse effect and the environmental problem is highlighted. Therefore, new energy systems such as solar energy, wind energy, geothermal energy and tidal energy have aroused a wide range of research. However, compared with the fossil energy, these new energy sources have large volatility and the drawbacks of continuous power generation, which limits its large-scale, long-term use. Therefore, development efficient energy storage syste...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/62H01M10/36
CPCH01M4/04H01M4/0404H01M4/628H01M10/36Y02E60/10
Inventor 张乃庆郭志坤范立双张宇尹肖菊
Owner HARBIN INST OF TECH
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