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Preparation method of perfluorinated high-temperature proton-conductor composite membrane

A proton conductor and composite membrane technology, which is applied in fuel cell parts, fuel cells, structural parts, etc., can solve problems such as the decrease of methanol permeability, and achieve the effects of avoiding pollution, low cost of phosphoric acid, and good mechanical properties.

Inactive Publication Date: 2010-07-07
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, Jiang et al. used Nafion membrane as the substrate, and prepared a multilayer Nafion composite membrane through its self-assembly in polydiallyl dimethyl ammonium chloride and polystyrene sodium sulfonate, which is comparable to pure Nafion membrane. Compared with the composite membrane, the methanol permeability is significantly lower

Method used

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  • Preparation method of perfluorinated high-temperature proton-conductor composite membrane
  • Preparation method of perfluorinated high-temperature proton-conductor composite membrane
  • Preparation method of perfluorinated high-temperature proton-conductor composite membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Preparation of high temperature proton conductor composite membrane (Nafion-BMIM / H 3 PO 4 ) method steps are as follows.

[0036] (1) Pretreatment of Nafion membrane

[0037] The perfluorinated sulfonic acid membrane was sequentially placed in H 2 o 2 In aqueous solution, 80°C deionized water, H 2 SO 4 Soak in the aqueous solution for 1 hour, rinse with deionized water at room temperature, and soak the membrane in deionized water at room temperature for later use.

[0038] The perfluorinated sulfonic acid membrane adopts Nafion membrane. h 2 o 2 The volume concentration of the aqueous solution is 6%, and the temperature is 80°C; H 2 SO 4 The concentration of the aqueous solution is 0.6mol / L, and the temperature is 80°C.

[0039] (2) Put the pretreated Nafion membrane into an oven, dry it at 110°C for 7 hours, put the ionic liquid into the container, completely soak the Nafion membrane with constant weight after drying in the BMIMOH ionic liquid, and seal the ...

Embodiment 2

[0043] Preparation of high temperature proton conductor composite membrane (Nafion-BMIM / H 3 PO 4 ) method steps are as follows.

[0044] (1) Pretreatment of Nafion membrane

[0045] The perfluorinated sulfonic acid membrane was sequentially placed in H 2 o 2 In aqueous solution, 70°C deionized water, H 2 SO 4 Soak in the aqueous solution for 2 hours each, and then rinse with deionized water at room temperature, then soak the membrane in deionized water at room temperature for later use.

[0046] The perfluorinated sulfonic acid membrane adopts Nafion membrane. h 2 o 2 The volume concentration of the aqueous solution is 3%, and the temperature is 70°C; H 2 SO 4 The concentration of the aqueous solution is 0.3mol / L, and the temperature is 70°C.

[0047] (2) Put the pretreated Nafion membrane into an oven, dry it at 120°C for 6 hours, put the ionic liquid into the container, completely soak the Nafion membrane with constant weight after drying in the BMIMOH ionic liqui...

Embodiment 3

[0051] Preparation of high temperature proton conductor composite membrane (Nafion-BMIM / H 3 PO 4 ) method steps are as follows.

[0052] (1) Pretreatment of Nafion membrane

[0053] The perfluorinated sulfonic acid membrane was sequentially placed in H 2 o 2 In aqueous solution, 90°C deionized water, H 2 SO 4 Soak in the aqueous solution for 0.5h each, and then rinse with deionized water at room temperature, then soak the membrane in deionized water at room temperature for later use.

[0054] The perfluorinated sulfonic acid membrane adopts Nafion membrane. h 2 o 2 The volume concentration of the aqueous solution is 8%, and the temperature is 90°C; H 2 SO 4 The concentration of the aqueous solution is 0.8mol / L, and the temperature is 90°C.

[0055] (2) Put the pretreated Nafion membrane into an oven, dry at 100°C for 8 hours, put the ionic liquid into the container, completely soak the Nafion membrane with constant weight after drying in the BMIMOH ionic liquid, and...

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Abstract

The invention relates to a preparation method of a perfluorinated high-temperature proton-conductor composite membrane, belonging to the technical field of a fuel cell. A Nafion membrane is soaked in H2O2 water solution, deionized water and H2SO4 water solution sequentially and then is flushed and dried, and then the Nafion membrane is placed into BMIMOH ionic liquid for closed reaction at the temperature of 60-120 DEG C for 1-10h to obtain a Nafion-BMIM composite membrane. The ionic liquid at the surface of the Nafion-BMIM composite membrane is flushed by water and then placed into a vacuum drying chamber for drying. At the room temperature, the Nafion-BMIM composite membrane is completely soaked in phosphoric acid water solution for 12-48h for acid doping, so as to obtain the perfluorinated high-temperature proton-conductor composite membrane doped with phosphoric acid. The perfluorinated high-temperature proton-conductor composite membrane has good conductivity under the condition of no humidification at the temperature of 80-160 DEG C.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and relates to the membrane electrolyte technology of proton exchange membrane fuel cells, in particular to a preparation method of a perfluorinated high-temperature proton conductor composite membrane. Background technique [0002] A proton exchange membrane fuel cell uses a solid electrolyte membrane as the electrolyte that conducts current between the two electrodes of the battery. Proton exchange membrane is a kind of high molecular polymer. Polystyrene sulfonic acid membrane was used in the early stage. At present, perfluorinated sulfonic acid membrane is mainly used, such as the Nafion membrane series produced by DuPont. The carbon atoms in the main chain and side chains of this type of polymer membrane are all saturated by C-F bonds, and the end of the side chain is a sulfonic acid group, and protons can be transferred between these sulfonic acid groups so that the membrane has ions. c...

Claims

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Application Information

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IPC IPC(8): C08J7/12C08J7/14H01M8/02H01M2/16H01M8/1069
CPCY02E60/12Y02E60/50
Inventor 何荣桓杨景帅车全通靖莹莹
Owner NORTHEASTERN UNIV
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