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Alkaline anion exchange membrane, preparation method thereof and preparation method of formate fuel cell

An anion exchange membrane and alkaline anion technology, applied in fuel cells, circuits, electrical components, etc., can solve the problems of poor chemical stability, dimensional stability, low ion conductivity, poor mechanical properties, etc., and achieve good chemical stability, Effect of high ionic conductivity and good hydrophilicity

Inactive Publication Date: 2019-08-16
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the anion exchange membrane prepared by this method has the problems of poor mechanical properties and brittleness. At the same time, due to the inevitable pores between the nanosheets, fuel leakage may occur, thus limiting the use of this anion exchange membrane. scope of application
[0009] At present, alkaline anion exchange membranes generally have high fuel permeability, low ion conductivity, poor chemical stability and poor dimensional stability.

Method used

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  • Alkaline anion exchange membrane, preparation method thereof and preparation method of formate fuel cell
  • Alkaline anion exchange membrane, preparation method thereof and preparation method of formate fuel cell
  • Alkaline anion exchange membrane, preparation method thereof and preparation method of formate fuel cell

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The process of preparing the basic anion exchange membrane of this example is:

[0048] 1) Preparation of magnesium-aluminum layered double hydroxide

[0049] Measure 4.6 mL of formamide and 15.4 mL of deionized water to prepare a formamide solution with a volume fraction of 23 vol%, add 17 mg of sodium nitrate to dissolve, and stir magnetically at 80°C until uniform.

[0050] Prepare 20mL of a mixed aqueous solution of 0.040M magnesium nitrate and 0.010M aluminum nitrate.

[0051] Add the mixed solution of magnesium nitrate and aluminum nitrate dropwise to the solution of formamide and sodium nitrate. The solution is magnetically stirred at 80°C. At the same time, 0.25M sodium hydroxide solution is added dropwise to adjust the pH of the system to 9-10.

[0052] The reaction time of the solution was 10 minutes.

[0053] The reacted product was centrifuged and washed three times with deionized water to obtain a transparent magnesium-aluminum double hydroxide colloid. ...

Embodiment 2

[0068] The process of preparing the basic anion exchange membrane of this example is:

[0069] 1) Preparation of magnesium-aluminum layered double hydroxide

[0070] Measure 4.6 mL of formamide and 15.4 mL of deionized water to prepare a formamide solution with a volume fraction of 23 vol%, add 15 mg of sodium nitrate to dissolve, and stir magnetically at 80 degrees Celsius to make it even.

[0071] Prepare 20 mL of a mixed aqueous solution of 0.040M magnesium nitrate and 0.010M aluminum nitrate.

[0072] Add the mixed solution of magnesium nitrate and aluminum nitrate dropwise to the solution of formamide and sodium nitrate. The solution is magnetically stirred at 85°C. At the same time, 0.25M sodium hydroxide solution is added dropwise to keep the pH of the system at 9-10.

[0073] The reaction time was 10 minutes.

[0074] The reacted product is centrifuged and washed 2-3 times with deionized water to obtain a transparent magnesium-aluminum double hydroxide colloid.

[0...

Embodiment 3

[0089] The process of preparing the basic anion exchange membrane of this example is:

[0090] 1) Preparation of magnesium-aluminum layered double hydroxide

[0091] Measure 4.6mL of formamide and 15.4mL of deionized water to prepare a formamide solution with a volume fraction of 23vol%, add 20mg of sodium nitrate to dissolve, and stir magnetically at 80°C until uniform.

[0092] Prepare 20mL of a mixed aqueous solution of 0.040M magnesium nitrate and 0.010M aluminum nitrate.

[0093] The mixed solution of magnesium nitrate and aluminum nitrate was added dropwise to the formamide and sodium nitrate solution, and the solution was magnetically stirred at 80°C. At the same time, 0.25M sodium hydroxide solution was added dropwise to keep the pH of the system at 10.

[0094] The reaction time was 10 minutes.

[0095] The reacted product is centrifuged and washed 2-3 times with deionized water to obtain a transparent magnesium-aluminum double hydroxide colloid.

[0096] The produ...

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Abstract

The invention relates to an alkaline anion exchange membrane, a preparation method thereof and a preparation method of a formate fuel cell. In the alkaline anion exchange membrane, polybenzimidazole is used as the basal body of an alkaline membrane, and layered bimetal hydroxide nanoparticles are introduced to improve the ionic conductivity of the membrane. Polybenzimidazole has excellent high temperature resistance and corrosion resistance, good hydrophilicity, good thermal stability and good mechanical properties. The imidazole ring in the molecular structure of polybenzimidazole has two functional groups of -N= and -NH-, and has good hydroxyl conduction properties after alkali doping. The layered bimetal hydroxide layer has exchangeable anions between sheet-like structures, has good hydroxyl conductivity after the exchange of hydroxyl ions, and thus is widely used as an ion exchange carrier. Since the layered bimetal hydroxide has good alkali stability because of being synthesized in an alkaline environment.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and relates to an alkaline anion exchange membrane and its preparation method and a preparation method of a formate fuel cell, in particular to an alkaline membrane composited with a layered double metal hydroxide and a polybenzimidazole polymer. Anion exchange membrane and preparation method and direct formate fuel cell assembled based on the membrane. Background technique [0002] A fuel cell is a device that directly converts chemical energy in fuel into electrical energy through electrochemical reactions. Compared with traditional power technologies, fuel cells have high energy conversion efficiency, are not limited by the Carnot cycle, and have good reliability and operability. , a wide range of fuel choices, low noise, clean and environmentally friendly, etc., have received more and more attention in recent years. [0003] There are many types of fuel cells, among which polymer electrol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1048H01M8/1069H01M8/1009
CPCH01M8/1009H01M8/1048H01M8/1069Y02E60/50
Inventor 陈福义刘华振
Owner NORTHWESTERN POLYTECHNICAL UNIV
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