Organic phosphonic acid high-temperature proton exchange membrane for fuel cell and preparation method thereof

A proton exchange membrane and organic phosphonic acid technology, which is applied in fuel cells, circuits, electrical components, etc., can solve the problems of mechanical strength decline, inorganic phosphoric acid loss, affecting membrane dimensional stability and service life, etc.

Active Publication Date: 2018-09-28
SHANGHAI INST OF ORGANIC CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the widely used high-temperature proton exchange membrane is PBI (polybenzimidazole) type proton exchange membrane. This membrane is used together with inorganic phosphoric acid, which has obvious disadvantages: (a) seri

Method used

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  • Organic phosphonic acid high-temperature proton exchange membrane for fuel cell and preparation method thereof
  • Organic phosphonic acid high-temperature proton exchange membrane for fuel cell and preparation method thereof
  • Organic phosphonic acid high-temperature proton exchange membrane for fuel cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] OSO 2 -PBI and [3-(trimethylsilyloxymethyl)-1-vinyltriazole-allyl phosphonic acid bis(triethylsilyl)] copolymer B 1 and organic polymer crosslinking agent C 1 Preparation of composite membrane

[0071]

[0072] (1) 3-(trimethylsiloxymethyl)-1-vinyltriazole-allylphosphonic acid bis(triethylsilyl)ester] copolymer B 1 (molar ratio 1:10) preparation

[0073] Under the protection of nitrogen, 3-(trimethylsiloxymethyl)-1-vinyltriazole (197.1mg, 1mmol) and allylphosphonic acid bis(triethylsilane) were successively added into the three-necked reaction flask ) ester (3501.9mg, 10mmol), deionized water (250mL) was used as solvent, and then a free radical chain initiator azobisisobutyronitrile (AIBN, 18.1mg, 0.11mmol) was added. Stir (mechanical stirring) and heat to 80°C for reaction. After reacting for 24h, the solution became viscous, the reaction was stopped, and it was cooled to room temperature. Pour the reaction solution into ethyl acetate, and keep stirring, solid...

Embodiment 2

[0077] f 6 -PBI and [2-(trimethylsilyloxymethyl)-1-vinylimidazole-vinylphosphonic acid bis(trimethylsilyl) ester] copolymer B 2 and organic polymer crosslinking agent C 2 Preparation of composite membrane

[0078]

[0079] (1) 2-(Trimethylsilyloxymethyl)-1-vinylimidazole-vinylphosphonic acid bis(trimethylsilyl) copolymer B 2 (molar ratio 1:8) preparation

[0080] Under nitrogen protection, 2-(trimethylsiloxymethyl)-1-vinylimidazole (196.1 mg, 1 mmol) and vinylphosphonic acid bis(trimethylsilyl) ester ( 2016.7mg, 8mmol), with deionized water (200mL) as the solvent, and then adding the radical chain initiator azobisisobutyronitrile (AIBN, 14.8mg, 0.09mmol). Stir (mechanical stirring) and heat to 80°C for reaction. After reacting for 24h, the solution became viscous, the reaction was stopped, and it was cooled to room temperature. Pour the reaction solution into ethyl acetate, and keep stirring, solids are precipitated, filtered, and vacuum-dried to obtain copolymer B 2...

Embodiment 3

[0084] Poly[2,6-[4′,4″-(diphenylmethane)]-benzodiimidazole] and [(5-vinyltriazole-1-)methanol—1,1-vinyldi Phosphonic acid] copolymer B 3 and organic polymer crosslinking agent C 3 Preparation of composite membrane

[0085]

[0086] (1) (5-vinyltriazole-1-)methanol-1,1-vinyl diphosphonic acid copolymer B 3 (molar ratio 1:6) preparation

[0087] Under nitrogen protection, (5-vinyltriazole-1-)methanol (125.1mg, 1mmol) and 1,1-vinyldiphosphonic acid (1127.9mg, 6mmol) were successively added to a three-necked reaction flask to remove Ionized water (200 mL) was used as a solvent, and then a free radical chain initiator, azobisisobutyronitrile (AIBN, 8.2 mg, 0.05 mmol), was added. Stir (mechanical stirring) and heat to 80°C for reaction. After reacting for 24h, the solution became viscous, the reaction was stopped, and it was cooled to room temperature. Pour the reaction solution into ethyl acetate, and keep stirring, solids are precipitated, filtered, and vacuum-dried to ob...

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Abstract

The invention provides an organic phosphonic acid high-temperature proton exchange membrane for a fuel cell and a preparation method thereof. Specifically, the invention provides the organic phosphonic acid high-temperature proton exchange membrane for the fuel cell compounded by taking (a) polybenzimidazole compound A, (b) an acid-alkali organic phosphonic acid polymer B containing hydroxyl functional group or hydroxyl protected by a protecting group, and (c) organic polymer cross-linking agent C; the organic phosphonic acid high-temperature proton exchange membrane has high proton conductivity, high mechanical strength, high thermal stability, and high anti-oxidation stability, and has long-time and stable life, and is especially suitable for the preparation of the high-temperature proton exchange membrane fuel cell.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to an organic phosphonic acid high-temperature proton exchange membrane for fuel cells and a preparation method thereof. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is an efficient and environment-friendly power generation device. It uses clean energy as fuel, and can directly and continuously convert the chemical energy of the fuel into electrical energy. Its power generation process does not involve combustion, so it is not limited by the Carnot cycle, the energy conversion rate is high, and its theoretical thermal efficiency can reach 86%, far exceeding the traditional heat engine (the thermal efficiency of the traditional heat engine is about 45%). At the same time, due to its advantages of high efficiency, low pollution, short construction time, good reliability and maintainability, it is very suitable for various purposes such as tr...

Claims

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Application Information

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IPC IPC(8): H01M8/102H01M8/1027H01M8/1072
CPCH01M8/102H01M8/1027H01M8/1072Y02E60/50
Inventor 胡金波何正标李铃春陈佳孝祝传贺邓玲
Owner SHANGHAI INST OF ORGANIC CHEM CHINESE ACAD OF SCI
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