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Solid alkaline fuel cell comprising ion exchange membrane

An anion-exchange membrane and fuel cell technology, applied in the field of ion-exchange membranes, can solve problems such as unsatisfactory performance

Inactive Publication Date: 2007-07-11
SOLVAY SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] State-of-the-art SAFCs, such as those described in Agel et al. (2001) Journal of Power Source 101, 267, do not exhibit a satisfactory compromise between these desired properties

Method used

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  • Solid alkaline fuel cell comprising ion exchange membrane
  • Solid alkaline fuel cell comprising ion exchange membrane
  • Solid alkaline fuel cell comprising ion exchange membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0171] Example 1 : N,N,2,2-tetramethyl-1,3-propanediamine-ETFE-g-St carrier

[0172] 50 μm ETFE membranes were modified by radiation grafting using a mixture of styrene / divinylbenzene (3% vol) up to a degree of grafting of 50%w.

[0173] The grafted copolymer ETFE-g-St (50%w) was then treated as follows:

[0174] 1. Chlorosulfonation was performed by immersing the membrane in a large excess of 5% vol chlorosulfonic acid (CAS) in 1,2-dichloroethane. The reaction was carried out at 60°C for 4 hours.

[0175] 2. Extract unreacted CSA with diethyl ether at room temperature.

[0176] 3. Amination of chlorosulfonyl functional groups by contacting the membrane with a large excess of 5% vol N,N,2,2-tetramethyl-1,3-propanediamine in acetonitrile, the reaction was carried out at 60 °C for 16 Hour.

[0177] 4. Wash the aminated membrane sequentially with (1) 1 N NaOH solution, (2) ethanol at 60°C.

[0178] 5. Final quaternization by exposing the membrane to a large excess of 1 M so...

Embodiment 2

[0180] Example 2: N,N,2,2-tetramethyl-1,3-propanediamine-ETFE-g-St carrier

[0181] A 30 μm ETFE membrane was modified by radiation grafting using a mixture of styrene / divinylbenzene (3% vol) up to a degree of grafting of 42%w.

[0182] The grafted copolymer ETFE-g-St (42%w) was then treated as follows:

[0183] 1. Chlorosulfonation was performed by immersing the membrane in a large excess of 5% vol chlorosulfonic acid (CAS) in 1,2-dichloroethane. The reaction was carried out at 60°C for 2 hours.

[0184] 2. Extract unreacted CSA with diethyl ether at room temperature.

[0185] 3. Amination of chlorosulfonyl functional groups by contacting the membrane with a large excess of 5% vol of N,N,2,2-tetramethyl-1,3-propanediamine in acetonitrile, the reaction was carried out at 60 °C 6 hours.

[0186] 4. Wash the aminated membrane sequentially with (1) 1 N NaOH solution, (2) ethanol at 60°C.

[0187] 5. Final quaternization by exposing the membrane to a large excess of 1 M sol...

Embodiment 3

[0189] Example 3 : N-methylpiperazine-ETFE-g-St carrier

[0190] A 30 μm ETFE membrane was modified by radiation grafting using a mixture of styrene / divinylbenzene (3% vol) up to a degree of grafting of 42%w.

[0191] The grafted copolymer ETFE-g-St (42%w) was then treated as follows:

[0192] 1. Chlorosulfonation was performed by immersing the membrane in a large excess of 5% vol chlorosulfonic acid (CAS) in 1,2-dichloroethane. The reaction was carried out at 60°C for 2 hours.

[0193] 2. Extract unreacted CSA with diethyl ether at room temperature.

[0194] 3. Amination of the chlorosulfonyl functional group by contacting the membrane with a large excess of 5% vol N-methylpiperazine in acetonitrile, the reaction was carried out at 60°C for 16 hours.

[0195] 4. Wash the aminated membrane sequentially with (1) 1 N NaOH solution, (2) ethanol at 60°C.

[0196] 5. Final quaternization by exposing the membrane to a large excess of 1 M solution of methyl chloride in a mixtur...

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PUM

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Abstract

The present invention provides solid alkaline fuel cells comprising anion exchange membranes which comprise diamines or polyamines coupled to a support polymer via a sulfonamide linkage. At least one nitrogen atom of the diamine or polyamine is a quaternized nitrogen atom acting as an anion exchange group. The anion exchange membrane exhibits favourable properties that render it suitable for use in a solid alkaline fuel cell.

Description

technical field [0001] The present invention relates to solid alkaline fuel cells comprising specific ion exchange membranes. The present invention also relates to ion exchange membranes particularly suitable for solid alkaline fuel cells. Background technique [0002] In recent years, fuel cell technology has attracted considerable interest. In the simplest case, a fuel cell comprises two electrically conductive electrodes separated from each other by an ion-conducting membrane, and reaction media such as hydrogen and oxygen are fed through integrated gas or liquid feed tubes. [0003] Since the electrolyte operates at typical temperatures below 100°C, most polymer electrolyte membranes currently used in fuel cells are proton exchange membranes and are based on perfluorosulfonic acid (PFSA) polymers. A typical example of such a perfluorosulfonic acid (PFSA) polymer membrane is the product Nafion(R), which is widely used in fuel cells. Examples of perfluorinated polymers ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/10B01D67/00C08J5/22
CPCB01D71/32H01M8/1072B01D71/26H01M2300/0082C08J5/2218B01D67/0088H01M8/1009H01M8/1023H01M8/106H01M8/083H01M8/1088Y02E60/522Y02P70/50Y02E60/50B01D71/262B01D71/261H01M8/10B01D67/00C08J5/22
Inventor 拉希德·埃尔·穆萨维罗兰德·马丁
Owner SOLVAY SA
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