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Structure controllable phosphorylated polymer composite film used for vanadium battery and preparation method thereof

A technology of polymer and vanadium batteries, which is applied in fuel cell parts, structural parts, regenerative fuel cells, etc., can solve the problems of high vanadium ion permeability, short service life, and high price, and achieve high voltage efficiency and Energy conversion efficiency, cost reduction, and the effect of promoting the commercialization process

Inactive Publication Date: 2011-07-06
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the VRB diaphragms that have been commercialized include the perfluorosulfonic acid membrane Nafion117 membrane of Du Dont Company in the United States, the homogeneous ion exchange membrane PE-01 diaphragm of Zhejiang Qianqiu Industrial Co., Ltd., etc., and the commercialized perfluorosulfonic acid Nafion117 membrane has a strong Excellent mechanical strength and chemical stability, but the use of vanadium ions in VRB has high permeability, and the positive and negative electrodes have obvious water migration during charging and discharging, and the price is too expensive
The PE-01 diaphragm has the advantages of high ion permeability, but it has poor stability and short service life during application.

Method used

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  • Structure controllable phosphorylated polymer composite film used for vanadium battery and preparation method thereof
  • Structure controllable phosphorylated polymer composite film used for vanadium battery and preparation method thereof
  • Structure controllable phosphorylated polymer composite film used for vanadium battery and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] (1) Add 10g trifluoroethyl methacrylate, 10g trimethylchlorosilane-terminated hydroxyethyl methacrylate, 0.2g 2-bromoisobutyric acid propynyl alcohol, 0.3g pentafluoroethyl methacrylate to a 100ml round bottom flask Methyldiethylenetriamine and 50ml N,N-dimethylformamide, the mixed system was dissolved and argon was bubbled for 30min, then deoxygenated, and then the solution was transferred to a 100ml round bottom flask containing 0.2g cuprous chloride Polymerization reaction was carried out at 75°C for 8h, the reaction product was precipitated in water, washed with water and then washed with n-hexane, and then vacuum-dried at 55°C for 12h to constant weight to obtain an alkynyl-containing copolymer; the structure of an alkynyl-containing copolymer Such as figure 1 shown;

[0045] (2) Add 14.88g polysulfone and 750ml chloroform in a 1000ml round bottom flask, stir at room temperature to dissolve the polysulfone, then add 10g paraformaldehyde, 0.8ml tin tetrachloride an...

Embodiment 2

[0055] Same as Example 1, except that 35 g of trifluoroethyl methacrylate and 30 g of trimethylchlorosilane-terminated hydroxyethyl methacrylate were added in the reaction of step (1). The phosphorylated polymer composite membrane obtained in this embodiment has a structure as shown in formula (I), wherein m is 18, x is 22, and n is 65.

Embodiment 3

[0057] Same as Example 1, except that 30 g of trifluoroethyl methacrylate and 10 g of trimethylchlorosilane-capped hydroxyethyl methacrylate were added to the reaction in step (1). The phosphorylated polymer composite membrane obtained in this embodiment has a structure as shown in formula (I), wherein m is 6, x is 18, and n is 65.

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Abstract

The invention discloses a structure controllable phosphorylated polymer composite film used for a vanadium battery and a preparation method thereof. The polymer composite film has the structure shown in the formula (I). The preparation method of the polymer composite film comprises the steps of: preparing a copolymer containing an alkynyl; preparing polysulfone containing an azide group; preparing a polymer; preparing a polymer containing an oxhydryl; dissolving the polymer containing the oxhydryl in dioxane, adding triethylamine and cuprous chloride, dropping diethyl chlorophosphate, filtering after reaction, adding filtrate in normal hexane to be precipitated, dissolving the precipitate in chloroform again, adding the solvent in the normal hexane to be precipitated again, and washing and drying the precipitate to obtain a phosphorus-esterificated polymer; dissolving the phosphorus-esterificated polymer in a high-boiling-point solvent to obtain a phosphorus-esterificated polymer solution; forming a film on a glass plate, and demolding in water to obtain a phosphorus-esterificated polymer film; and putting the film in concentrated hydrochloric acid for back flow and hydrolysis, taking the film out, washing and drying the film to obtain a product. The composite film has low permeability of vanadium ions, good proton conductivity, stable mechanical performance and chemical performance, and low cost.

Description

technical field [0001] The invention belongs to the field of polymer functional battery membrane materials, and relates to an ion exchange membrane for an all-vanadium redox flow battery, in particular to a phosphorylated polymer composite membrane with controllable structure for a vanadium battery and a preparation method thereof. Background technique [0002] Today, as environmental and energy issues are increasingly troubling the world, the use of renewable energy such as solar energy and wind energy has become the direction of development for various countries. In order to make better use of these renewable energy sources, the development of energy storage systems has become more and more important. . The all-vanadium redox battery (VRB) is prepared based on the principle of electrochemical oxidation and reduction of two completely soluble redox couples on an inert electrode, and the redox couple is composed of different valences of the same metal vanadium. composed of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M2/16C08L87/00C08G81/02H01M8/18
CPCY02E60/12Y02E60/50
Inventor 胡继文张干伟卢汝烽肖定书胡美龙
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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