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Modified sulfonated poly ether ether ketone (SPEEK) membrane applied to direct methanol fuel cell (DMFC) and preparation method of SPEEK membrane

A technology of sulfonated polyetheretherketone and fuel cells, which is applied in fuel cell parts, fuel cells, electrochemical generators, etc., can solve the problem of reducing methanol penetration, which is difficult to achieve, and the unified inorganic nano Material loss and other issues, to achieve the effect of low cost, high proton conductivity, and reduce methanol permeability

Inactive Publication Date: 2011-04-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Chinese invention patent CN200410027559.x discloses a proton exchange membrane with sulfonated resin as raw material, adding inorganic nanomaterials and its preparation process. The main problem is that it is difficult to achieve the unity of reducing methanol permeation and maintaining proton conductivity and Loss of inorganic nanomaterials during long-term use

Method used

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  • Modified sulfonated poly ether ether ketone (SPEEK) membrane applied to direct methanol fuel cell (DMFC) and preparation method of SPEEK membrane
  • Modified sulfonated poly ether ether ketone (SPEEK) membrane applied to direct methanol fuel cell (DMFC) and preparation method of SPEEK membrane

Examples

Experimental program
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Embodiment 1

[0024] Example 1: Dissolving sulfonated polyetheretherketone (SPEEK) in N,N-dimethylacetamide (DMAc) to prepare a 10wt% solution. The sulfonation degree of sulfonated polyetheretherketone resin is 50-55%; then add tetraphenylporphyrin according to the mass ratio of sulfonated polyether ether ketone resin to tetraphenylporphyrin at 1:0.01, and stir at 60°C 1h, and then cast on a clean glass plate to form a film. Dry at 60°C for 24 hours, and remove the film after cooling to room temperature. Place the peeled membrane in 1M H 2 SO 4 Soak in aqueous solution for 24h. Take it out for washing and soak it in deionized water for later use. A tetraphenylporphyrin-modified sulfonated polyether ether ketone proton exchange membrane is obtained.

Embodiment 2

[0025] Example 2: Dissolving sulfonated polyetheretherketone (SPEEK) in N,N-dimethylacetamide (DMAc) to prepare a 10 wt.% solution. The degree of sulfonation of the sulfonated polyetheretherketone resin is 60-65%; then add tetraphenylporphyrin according to the ratio of sulfonated polyetheretherketone resin: tetraphenylporphyrin = 1:0.001, stir at 60°C for 1 hour, and then Films were cast on clean glass plates. Dry at 60°C for 24 hours, and remove the film after cooling to room temperature. Place the peeled membrane in 1M H 2 SO 4 Soak in aqueous solution for 24h. Take it out for washing and soak it in deionized water for later use. A tetraphenylporphyrin-modified sulfonated polyether ether ketone proton exchange membrane is obtained.

Embodiment 3

[0026] Example 3: Dissolving sulfonated polyetheretherketone (SPEEK) in N,N-dimethylacetamide (DMAc) to prepare a 10 wt.% solution. The degree of sulfonation of the sulfonated polyetheretherketone resin is 65-70%; then add tetraphenylporphyrin according to the ratio of sulfonated polyetheretherketone resin: tetraphenylporphyrin = 1:0.05, stir at 60°C for 1 hour, and then Films were cast on clean glass plates. Dry at 60°C for 24 hours, and remove the film after cooling to room temperature. Place the peeled membrane in 1M H 2 SO 4 Soak in aqueous solution for 24h. Take it out for washing and soak it in deionized water for later use. The tetrasulfophenylporphyrin-modified sulfonated polyether ether ketone proton exchange membrane is obtained.

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Abstract

The invention discloses a modified sulfonated poly ether ether ketone (SPEEK) membrane applied to a direct methanol fuel cell (DMFC) and a preparation method of the SPEEK membrane. The preparation method comprising the following steps: dissolving a polyether-ether-ketone (PEEK) resin in N, N-dimethylacetylamide or N, N-dimethyl formamide to form an SPEEK resin solution; adding a porphyrin compound to the SPEEK resin solution based on mass ratio of 1-50:1000 of the porphyrin compound to the SPEEK resin solution; and carrying out membrane-forming method such as a tape casting method, a pasting method and a gumming method on the obtained SPEEK resin solution of the porphyrin compound so as to prepare into the modified proton exchange membrane (PEM). In the preparation method, the porphyrin compound which does not penetrate through the methanol and can conduct protons is embedded or bonded to the ion channel of the SPEEK membrane so as to form a hydrogen ion sieve structure, thus maintaining higher proton transmissibility while greatly reducing transmissivity of the methanol, and simultaneously reducing the preparation cost of the proton exchange membrane.

Description

technical field [0001] The invention relates to a proton exchange membrane, in particular to a modified sulfonated polyether ether ketone membrane applied to a direct alcohol fuel cell and a preparation method thereof. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is an electrochemical device that can directly convert chemical energy into electrical energy. It has the characteristics of high energy conversion efficiency, environmental friendliness, high specific energy (compared to batteries), low operating temperature, and fast start-up. , has aroused widespread attention from all over the world. Proton exchange membrane fuel cells that directly use liquid alcohol as fuel are commonly known as direct alcohol fuel cells (Direct alcohol fuel cell, DAFC). Its outstanding advantages are that the source of alcohol is abundant and easy to obtain, the price is cheap, and it is easy to carry and store. At the same time, compared with general hydrogen-ox...

Claims

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Application Information

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IPC IPC(8): C08J5/22C08L61/16C08K5/3415C08K5/42H01M2/16H01M8/02H01M8/1025H01M8/1069H01M8/1088
CPCY02E60/12Y02E60/50
Inventor 于非张果戈周震涛
Owner SOUTH CHINA UNIV OF TECH
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