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A kind of preparation method and application of zinc ion battery metal zinc negative electrode dynamic interface coating

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

Active Publication Date: 2022-04-01
HARBIN INST OF TECH
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  • Application Information

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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

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  • A kind of preparation method and application of zinc ion battery metal zinc negative electrode dynamic interface coating
  • A kind of preparation method and application of zinc ion battery metal zinc negative electrode dynamic interface coating
  • A kind of preparation method and application of zinc ion battery metal zinc negative electrode dynamic interface coating

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specific Embodiment approach 1

[0026] Specific embodiment one: what this embodiment records is a kind of preparation method of zinc ion battery metal zinc negative electrode dynamic interface coating, described method comprises the following steps:

[0027] Step 1. Add boric acid into simethicone oil, stir and mix evenly at high speed, then add ferric chloride, and catalyze cross-linking under high temperature to prepare PDMS;

[0028] Step 2, titanium dioxide TiO 2 At a temperature of 400-450°C, heat treatment in an atmosphere with an argon-hydrogen volume ratio of 95:5 to obtain oxygen-deficient TiO 2-x ;

[0029] Step 3. Dissolve the prepared PDMS with a volatile ether organic solvent, and then add the organic salt Zn(TFSI) 2 ;

[0030] Step 4, the prepared oxygen-deficient TiO 2-x Added to the solution in step 3, the oxygen-deficient TiO 2-x The mass ratio of the solution in step 3 is 2%-15%, and the mixture is evenly mixed with high-speed stirring;

[0031] Step 5. Polish the surface of the zinc ...

specific Embodiment approach 2

[0035] Specific embodiment 2: The preparation method of a dynamic interface coating for metal zinc negative electrode of zinc ion battery described in specific embodiment 1, in step 1, the high temperature condition is 180°C to 220°C, and the temperature is too low to prevent crossover Joint reaction, too high temperature is not conducive to the preparation.

specific Embodiment approach 3

[0036] Specific embodiment three: the preparation method of a kind of zinc ion battery metal zinc negative electrode dynamic interface coating described in specific embodiment one, in step one, the addition ratio of described boric acid, dimethyl silicone oil and ferric chloride is 0.1~ 1g: 1mL: 0.01g.

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Abstract

The invention discloses a preparation method and application of a dynamic interface coating for a metal zinc negative electrode of a zinc ion battery, belonging to the technical field of energy materials. In the present invention, an interface layer that dynamically adapts to interfacial volume changes is modified on the surface of the metal zinc negative electrode of the zinc ion battery by a spin coating method, and the synthesized polymer PDMS has extremely high viscoelastic properties and exhibits high dynamic adaptability. Prepared TiO 2‑x Contains abundant oxygen vacancies. The dynamic interface coating prepared above can be applied in aqueous zinc-ion batteries. The present invention prepares PDMS / TiO with dynamic self-adaptive volume change 2‑x Interfacial coating, dynamic buffer volume changes suppress dendrite growth while inducing Zn via abundant oxygen vacancies 2+ The rapid and uniform transfer further improves the ionic conductivity of the interfacial layer to stabilize the Zn metal surface, thereby enhancing the utilization and cycle life of the battery.

Description

technical field [0001] The invention belongs to the technical field of energy materials, and in particular relates to a preparation method and an application of a zinc-ion battery metal zinc negative electrode dynamic interface coating. Background technique [0002] Today's economy and technology are advancing rapidly, and society's dependence on available energy is also increasing day by day. Traditional primary energy reserves such as natural gas, coal, and oil are gradually depleted, and the direct combustion of fossil fuels has led to a deepening of the greenhouse effect, and environmental problems have become prominent. Therefore, new energy systems such as solar energy, wind energy, geothermal energy, and tidal energy have attracted extensive research. However, compared with fossil energy, these new energy sources have the disadvantages of greater volatility and unsustainable power generation, which limits their large-scale and long-term use. Therefore, the developme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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