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Poly(arylene ether benzimidazole) ion exchange membrane and preparation thereof and all-vanadium redox flow battery

An ion exchange membrane and benzimidazole technology, applied in the field of polyaryl ether benzimidazole ion exchange membrane and its preparation, can solve the problems of harsh operating conditions, high requirements, lack of toughness, etc., and achieve excellent mechanical properties, good Toughness, the effect of simple process operation steps

Active Publication Date: 2013-04-10
DALIAN RONGKE POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The film forming process has higher requirements on experimental equipment and harsh operating conditions
Moreover, the film rigidity prepared by the poly[2,2'-(m-phenylene)-5,5'-bibenzimidazole] of the whole aromatic structure is too strong and lacks toughness.

Method used

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  • Poly(arylene ether benzimidazole) ion exchange membrane and preparation thereof and all-vanadium redox flow battery
  • Poly(arylene ether benzimidazole) ion exchange membrane and preparation thereof and all-vanadium redox flow battery
  • Poly(arylene ether benzimidazole) ion exchange membrane and preparation thereof and all-vanadium redox flow battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Will P 2 o 5 and CH 3 SO 3 H was mixed with heating and stirring at a weight ratio of 1:10 to form a uniform and transparent solution. Take 200ml and add it to a dry three-necked flask, then add 4.56g 3,4-diaminobenzoic acid, 18.1g 4,4 '-Hydroxydibenzoic acid and 15.0g 3,3,4,4'-tetraaminobiphenyl were added into a three-necked flask to fully dissolve, slowly heated to 140°C, and then reacted for 60 minutes to obtain a viscous polymer solution, which was polymerized The solution was poured on a flat glass plate, flattened with a mold knife, dried at 60°C for 20h, and then vacuum-dried at 110°C for 10h. The membrane was removed from the glass plate and washed with deionized water and ethanol to remove residual CH 3 SO 3 H, taking out and drying to obtain a dry polymer film. Dissolve in dimethyl sulfoxide to make 0.5gL -1 solution, its intrinsic viscosity measured with a rotational viscometer is 2.4dL g -1 , the tensile curve of the dry polymer film is shown in fi...

Embodiment 2

[0034] As in Example 1, the membrane was soaked at room temperature for 3 days with 6M phosphoric acid instead of sulfuric acid, taken out and dried to obtain a polyarylether benzimidazole ion exchange membrane with a thickness of 45 μ. The tensile strength of the film was 90 MPa, and the elongation at break was 28%.

Embodiment 3

[0036] As in Example 1, the membrane was soaked at room temperature for 3 days with 12M phosphoric acid instead of sulfuric acid, taken out and dried to obtain a polyaryl ether benzimidazole ion exchange membrane with a thickness of 80 μ. The tensile strength of the film was 35 MPa, and the elongation at break was 95%.

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Abstract

A polymer ion exchange membrane for acidic electrolyte flow battery. The membrane is nitrogen heterocycles aromatic polymer, especially polybenzimidazole type polymer. A nitrogen heterocycles in the membrane interact with acid in the electrolyte to form donor-receptor proton transport network, so as to keep the proton transport performance of the membrane. The preparation condition for the membrane is mild, and the process is simplicity. The preparation method is suitable for mass production. The membrane is used in acidic electrolyte flow battery, especially in vanadium flow energy storage battery. The membrane has excellent mechanical stability and thermostability. In vanadium redox flow battery, the membrane has excellent proton conduct performance and excellent resistance to the permeation of vanadium ions.

Description

technical field [0001] The invention relates to a polyaryl ether benzimidazole ion exchange membrane and a preparation method thereof, in particular to the application of the polyaryl ether benzimidazole ion exchange membrane in an all-vanadium redox flow battery. Background technique [0002] The all-vanadium redox flow battery is a new type of energy storage battery with vanadium ion sulfuric acid solutions in different valence states as the electrolyte and an ion-exchange membrane as the diaphragm. It has adjustable capacity and power, high-current non-destructive deep discharge, long service life, and easy It has the advantages of operation and maintenance. By "shaving peaks and filling valleys" on the existing power grid system, the unstable power input can be changed into continuous, safe and reliable power output, and the safety and reliability of the power grid can be improved. It is ideal in the field of wind power and solar power generation. The energy storage syst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/16H01M8/02H01M8/18H01M10/36C08G61/12C08L65/00C08J5/22
CPCY02E60/521H01M8/1048Y02E60/528H01M8/188H01M8/103C08G73/18H01M8/1027H01M8/1032H01M8/1051Y02E60/50
Inventor 张华民代化毕成肖少华麦振声
Owner DALIAN RONGKE POWER
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