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Ion exchange hybrid membrane for vanadium battery and preparation method thereof

A technology for ion exchange and vanadium batteries, applied in the field of ion exchange membranes, can solve the problems of limited number of functional functional groups, easy aggregation of silica particles, incompatibility and dispersion of polymers, etc., to achieve good chemical stability and improve The effect of proton transport density and low cost

Active Publication Date: 2022-02-18
杭州德海艾科能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an ion-exchange hybrid membrane for vanadium batteries and its preparation method, which solves the problem that the number of functional functional groups introduced in the prior art is limited, and silicon dioxide particles are easy to aggregate and cannot be well combined with polymers. Compatibility and Dispersion Issues

Method used

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  • Ion exchange hybrid membrane for vanadium battery and preparation method thereof
  • Ion exchange hybrid membrane for vanadium battery and preparation method thereof
  • Ion exchange hybrid membrane for vanadium battery and preparation method thereof

Examples

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Effect test

Embodiment 1

[0030] A method for preparing an ion-exchange hybrid membrane for a vanadium battery, comprising the following steps:

[0031] S1: Dry sulfonated polyether ether ketone with a sulfonation degree of 65% in a vacuum oven at 80°C for 6 hours to obtain pretreated sulfonated polyether ether ketone, and dissolve 10 g of pretreated sulfonated polyether ether ketone In 90g N,N-dimethylformamide, it is configured as a sulfonated polyether ether ketone solution with a mass concentration of 10%;

[0032] S2: Weigh 10g of nano-silica particles and disperse them into 70g of aqueous solution, add 2g of sodium persulfate, heat up to 80°C, stir and activate for 10 minutes to obtain pretreated nano-silica; detect nano-silica and obtain TEM images ,Such as figure 1 shown;

[0033] S3: adding 10 g of acrylic acid and 8 g of acrylamide monomer to the pretreated nano-silica, reacting for 8 hours, cooling and filtering, and drying in a vacuum oven at 60° C. for 6 hours to obtain polymer-modified ...

Embodiment 2

[0037] A method for preparing an ion-exchange hybrid membrane for a vanadium battery, comprising the following steps:

[0038] S1: Dry sulfonated polyether ether ketone with a sulfonation degree of 60% in a vacuum oven at 100°C for 4 hours to obtain pretreated sulfonated polyether ether ketone, and dissolve 5 g of pretreated sulfonated polyether ether ketone In 95g dimethyl sulfoxide, it is configured into a sulfonated polyether ether ketone solution with a mass concentration of 5%;

[0039] S2: Weigh 5g of nano-silica particles and disperse them into 80g of aqueous solution, add 1.5g of potassium persulfate, heat up to 86°C, stir and activate for 5min to obtain pretreated nano-silica;

[0040] S3: Add 8.5g of acrylic acid and 5g of acrylamide monomer to the pretreated nano-silica, react for 6h, cool down and filter, and dry in a vacuum oven at 60°C for 8h to obtain polymer-modified silica core-shell particles ;

[0041] S4: Add 3 g of polymer-modified silica core-shell part...

Embodiment 3

[0044] A method for preparing an ion-exchange hybrid membrane for a vanadium battery, comprising the following steps:

[0045] S1: Dry sulfonated polyether ether ketone with a sulfonation degree of 75% in a vacuum oven at 90°C for 6.5 hours to obtain pretreated sulfonated polyether ether ketone. 10 g of pretreated sulfonated polyether ether ketone Dissolved in 90g N,N-dimethylformamide, configured as a sulfonated polyether ether ketone solution with a mass concentration of 10%;

[0046] S2: Weigh 8g of nano-silica particles and disperse them into 65g of aqueous solution, add 2g of ammonium persulfate, heat up to 90°C, stir and activate for 5min, and obtain pretreated nano-silica;

[0047] S3: Add 15 g of acrylic acid and 10 g of acrylamide monomer to the pretreated nano-silica, react for 4 hours, cool down and filter, and dry in a vacuum oven at 80°C for 8 hours to obtain polymer-modified silica core-shell particles;

[0048] S4: Add 4g of polymer-modified silica core-shell par...

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Abstract

The invention discloses an ion-exchange hybrid membrane for a vanadium battery and a preparation method thereof, which is composed of silicon dioxide particles coated with acrylic acid and acrylamide copolymer and sulfonated polyether ether ketone, and is formed by casting process. The membrane also includes the following steps: S1: preparing a sulfonated polyether ether ketone solution; S2: preparing pretreated nano-silica; S3: preparing polymer-modified silica core-shell particles; S4: preparing sulfonated polyether ether Ketone / polymer modified silica solution; S4: The ion-exchange hybrid membrane for vanadium battery was prepared. The invention can reduce the cost of the membrane, effectively improve the vanadium blocking ability, and at the same time, the polymer coated on the surface of the silicon dioxide contains a large amount of carboxyl groups and amino groups, which can increase the proton transmission density and maintain its high proton conductivity.

Description

technical field [0001] The invention relates to the technical field of an ion-exchange membrane for an all-vanadium redox flow battery, in particular to an ion-exchange hybrid membrane for a vanadium battery and a preparation method thereof. Background technique [0002] Under the tide of global "green economy", the demand for distribution and storage of renewable energy has increased significantly. As an electrochemical energy storage technology, flow batteries have attracted much attention due to their advantages of large capacity, high safety, long-term energy storage, and long life. Among them, all-vanadium redox flow batteries (referred to as vanadium batteries) have higher safety performance due to the characteristics of water-based energy storage media. At the same time, vanadium batteries have obvious advantages in terms of cycle life, resource sustainability and resource recovery. competitive advantage. However, the commercial development of vanadium batteries has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/22C08L61/16C08K9/10C08K3/36H01M8/1051H01M8/1069H01M8/18
CPCC08J5/2256H01M8/1051H01M8/1069H01M8/188C08J2361/16C08K9/10C08K3/36Y02E60/50
Inventor 熊仁海王宇陈广新郭勇
Owner 杭州德海艾科能源科技有限公司
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