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Blend membranes based on sulfonated poly (phenylene ether) for enbanced polymer electrochemical cells

A technology of polymer film and polyphenylene ether, which is applied in the field of solid polymer electrolyte fuel cells, zinc halide batteries, ion exchange membranes, and electrolyte double-layer capacitors, can solve the scientific method of electrochemical cells without predictable blend polymer films And other issues

Inactive Publication Date: 2001-09-12
THE RES FOUND OF STATE UNIV OF NEW YORK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is little scientific way to predict which blend polymer membranes are suitable for electrochemical cells

Method used

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  • Blend membranes based on sulfonated poly (phenylene ether) for enbanced polymer electrochemical cells
  • Blend membranes based on sulfonated poly (phenylene ether) for enbanced polymer electrochemical cells
  • Blend membranes based on sulfonated poly (phenylene ether) for enbanced polymer electrochemical cells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Li at room temperature + Type light yellow sulfonated PPO polymer (Mw = 50,000) was immersed in 1N HCl solution for several hours. This step uses H + Exchange SO 3 - Li in the group + . The polymer was then carefully washed in deionized water to rinse excess acid. will wet H + Type sulfonated PPO was placed in a vacuum oven at 40°C for 24 hours. The sulfonated PPO was then dissolved in dimethylformamide (DMF) to form a 20% by weight solution. Separately prepare polyvinylidene fluoride PVF 2 (Mw=60,000) 20% by weight solution in DMF. Then 2.55 g of sulfonated PPO-DMF solution and 0.45 g of PVF 2 - The DMF solution was mixed for 1 hour at room temperature for blending. The blend of sulfonated PPO:PVF 2The weight ratio is 85:15. The blend solution was poured onto a clean glass plate surface and cast with a spatula. The glass plate was then placed in a chamber with a flow of dry air for 48 hours to evaporate most of the DMF. The final film was a dry, transluce...

Embodiment 2

[0063] Respectively, 20% (weight) of Li + Type sulfonated PPO polymer (Mw=50,000) was dissolved in DMF, and 20% (weight) of PVF 2 (Mw=60,000) was dissolved in DMF. Then, with sulfonated PPO and PVF 2 The two solutions were mixed in a weight ratio of 80:20. The resulting mixed solution was stirred at room temperature for 1 hour. The blend solution was poured onto a clean glass plate surface and cast with a spatula. The casting solution was then placed in a chamber under a flow of dry air for 48 hours. After the membrane was dried, it was placed in 0.5N HCl solution to exchange Li + to convert to the proton form. The thickness of the cast film was 55 µm, and the electric conductivity at 45° C. in a wet state was 0.22 S / cm. The film is suitable for electrolytic double layer capacitors and rechargeable zinc halide batteries.

Embodiment 3

[0065] 25% by weight of Li + A type sulfonated PPO polymer (Mw=50,000) was dissolved in isopropanol. No second polymer was added. The above solution was cast on the surface of a clean glass plate with a spatula to form a sulfonated PPO film. The film was dried under a dry air atmosphere for 48 hours and then placed in an oven at 70°C for 24 hours. The sulfonated membrane is transparent with a light yellow-brown color. The film thickness is 120 micrometers. Then, the membrane was placed in 0.1N HCl solution for 1 hour. The ICD of the film was measured to be 3.0 meq / g. The swelling ratio of the film in water was 25% at 30°C and 31% at 80°C. The conductivity of the film at 45°C was 0.016 S / cm.

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Abstract

Solid polymer membranes comprised of a high charge density sulfonated poly (phenylene oxide) blended with poly(vinylidene fluoride) in varied ratios have improved membrane characteristics. These membranes are inexpensive and possess very high ionic conductivity, and thus are suitable for solid polymer electrolytes in electrochemical applications, especially for the polymer electrolyte membrane (PEM) fuel cell, the electrolyte double-layer capacitor, and the rechargeable zinc-halide cell. These membranes enhance the performance of these devices.

Description

field of invention [0001] The present invention relates to homogeneous blends of sulfonated polyphenylene ether and polyvinylidene fluoride for use as ions in electrochemical applications such as solid polymer electrolyte fuel cells, electrolyte double layer capacitors, and rechargeable zinc halide batteries. exchange membrane. In addition, the present invention relates to improved solid polymer electrolyte fuel cells comprising novel blend membranes. The present invention also relates to improved electrolytic double layer capacitors comprising the novel blend films. Additionally, the present invention relates to rechargeable zinc halide batteries containing the novel blend membranes. Background of the invention [0002] A fuel cell is an electrochemical device in which part of a chemical reaction is directly converted into direct current electrical energy. The direct conversion of energy to DC power eliminates the inevitability of converting energy to heat, thereby avoid...

Claims

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Application Information

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IPC IPC(8): H01M8/02B01D71/52C08G65/334C08G65/48C08J5/22C08L27/16C08L71/12H01G9/025H01M8/10H01M10/36H01M12/08H01M50/414H01M50/426
CPCY02E60/521C08J5/2281C08J5/2268H01M8/1025H01M2/1653Y02E60/12H01M8/1039H01M8/1018C08G65/485C08J2327/16H01M10/36B01D71/52C08J2471/12H01M10/365C08J5/2256H01M8/1004H01M8/1044H01M2300/0082Y02E60/10H01M50/414H01M50/426B01D71/5223
Inventor I·卡巴索袁又欣C·米特尔斯特德
Owner THE RES FOUND OF STATE UNIV OF NEW YORK
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