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Preparation of proton conduction membrane

A proton-conducting membrane and proton-conducting technology, applied in the field of ion-exchange membrane preparation, can solve problems such as high cost, environmental pollution, and difficulty in large-scale mass production, and achieve high electrical conductivity, good toughness, and strong electrochemical corrosion resistance Effect

Active Publication Date: 2011-05-11
TSINGHUA UNIV
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

1) The preparation or modification of membrane materials often uses sulfonating agents with strong corrosive properties, which are costly and easy to cause environmental pollution; 2) The treatment process often includes multiple steps, which is difficult to apply to large-scale batch production

Method used

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Embodiment Construction

[0018] The implementation steps of the present invention are as follows.

[0019] 1) Use a chemical solvent to dissolve a polymer resin and a monomer containing a proton-conducting functional group, and use a casting method to coat a thin layer on a smooth solid surface, so that the solvent is volatilized to form a thin film; after that, a polymer resin containing a proton-conducting function is triggered The monomer of the group undergoes a polymerization reaction, and forms a proton-conducting membrane with a polymer chain interpenetrating network structure with the polymer resin;

[0020] 2) The chemical solvent described in 1) is dimethylsulfoxide, dimethylformamide, dimethylacetamide, methylpyrrolidone, and a mixture of two or more of the solvents;

[0021] 3) The polymer resin described in 1) is a fluorine-containing polymer compound, preferably polyvinylidene fluoride, and the concentration of the polymer resin in the solution is 3-45% (weight percent);

[0022] 4) The...

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Abstract

The invention relates to a preparation method for a proton-conducting membrane, and belongs to the technical field of ion exchange membranes. The preparation method is characterized in that dimethyl sulfoxide is adopted to dissolve polyvinylidene fluoride and sodium allylsulfonate monomer containing proton conducting functional group; a flow casting method is adopted to form a membrane on a smooth solid surface through flow casting; the sodium allylsulfonate monomer is initiated to carry out polyreaction; and the products of the polyreaction and polyvinylidene fluoride molecular chain are formed into the proton-conducting membrane of macromolecular interpenetrating network structure. The preparation method can obtain an ion exchange membrane material with ideal proton conductibility, and overcomes the disadvantage that the prior melting mould pressing process cannot prepare homogeneous phase ion exchange membranes; moreover, the preparation method has the advantages of simple technological process, easy industrial scaling up and the like.

Description

technical field [0001] The invention relates to the technical field of ion exchange membrane preparation, in particular to a method for preparing a proton conduction membrane used in a liquid flow battery. technical background [0002] The use of renewable energy such as solar energy, wind energy, and wave energy to generate electricity is one of the important ways for human beings to obtain energy in the future. Since solar energy and wind energy produce significant changes in power generation with day and night changes, it is difficult to maintain a stable power output. It needs to cooperate with a certain scale of power storage devices to form a complete power supply system to ensure continuous and stable power supply. The development of energy storage systems with high power conversion efficiency, large storage capacity and good economic performance has become the key to the development of renewable and clean energy. [0003] Vanadium Redox Battery (VRB) is a new type ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/22C08F259/08H01M2/16H01M50/403
CPCY02E60/10
Inventor 王保国龙飞范永生刘平
Owner TSINGHUA UNIV
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