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COMPOSITE POLYMER ELECTROLYTIC MEMBRANE, AND MEMBRANE ELECTRODE COMPOSITE AND SOLID POLYMER FUEL CELL USING the SAME

A polymer electrolyte and composite polymer technology, applied in fuel cells, fuel cell parts, conductive materials, etc., can solve the problem of large dimensional changes and achieve small dimensional change rates, high output, mechanical strength and chemical stability excellent effect

Active Publication Date: 2018-10-23
TORAY IND INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, hydrocarbon-based polymer electrolyte membranes tend to have large dimensional changes during dry-wet cycles, and it is required to reduce dimensional changes in order to improve physical durability.

Method used

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  • COMPOSITE POLYMER ELECTROLYTIC MEMBRANE, AND MEMBRANE ELECTRODE COMPOSITE AND SOLID POLYMER FUEL CELL USING the SAME
  • COMPOSITE POLYMER ELECTROLYTIC MEMBRANE, AND MEMBRANE ELECTRODE COMPOSITE AND SOLID POLYMER FUEL CELL USING the SAME
  • COMPOSITE POLYMER ELECTROLYTIC MEMBRANE, AND MEMBRANE ELECTRODE COMPOSITE AND SOLID POLYMER FUEL CELL USING the SAME

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0137] Hereinafter, the present invention will be described in more detail through examples, but the present invention is not limited thereto. In addition, various measurement conditions are as follows.

[0138] (1) Molecular weight of the polymer

[0139] The number average molecular weight and weight average molecular weight of the polymer solution were measured by GPC. HLC-8022GPC manufactured by TOSOH was used as an integrated device for ultraviolet detector and differential refractometer, and two TSK gelSuperHM-H (inner diameter 6.0 mm, length 15 cm) manufactured by TOSOH were used as GPC columns. The 2-pyrrolidone solvent (N-methyl-2-pyrrolidone solvent containing 10 mmol / L lithium bromide) was measured at a flow rate of 0.2 mL / min, and the number average molecular weight and weight average molecular weight were determined in terms of standard polystyrene.

[0140] (2) Ion exchange capacity (IEC)

[0141] Determined by neutralization titration. The measurement was ca...

Synthetic example 1

[0228] (Synthesis of 2,2-bis(4-hydroxyphenyl)-1,3-dioxolane (K-DHBP) represented by the following general formula (G1))

[0229] Put 49.5g of 4,4'-dihydroxybenzophenone, 134g of ethylene glycol, 96.9g of trimethyl orthoformate, and p-toluenesulfonic acid monohydrate into a 500ml flask equipped with a stirrer, a thermometer, and a distillation tube 0.50 g was dissolved. Then keep stirring at 78-82°C for 2 hours. Further, the internal temperature was gradually raised to 120° C., and heating was performed until the distillation of methyl formate, methanol, and trimethyl orthoformate completely stopped. After cooling the reaction solution to room temperature, the reaction solution was diluted with ethyl acetate, and the organic layer was washed and separated with 100 ml of a 5% potassium carbonate aqueous solution, and then the solvent was distilled off. 80 ml of dichloromethane was added to the residue to precipitate crystals, which were filtered and dried to obtain 52.0 g of 2...

Synthetic example 2

[0232] (Synthesis of 3,3'-disodium disulfonate-4,4'-difluorobenzophenone represented by the following general formula (G2))

[0233] Make 4,4'-difluorobenzophenone 109.1g (Aldrich reagent) in fuming sulfuric acid (50%SO 3 ) in 150mL (Wako Pure Chemical Chemicals) at 100°C for 10 hours. Thereafter, a small amount was poured into a large amount of water one by one, and after neutralizing with NaOH, 200 g of common salt (NaCl) was added to precipitate the composite. The obtained precipitate was separated by filtration and recrystallized from an aqueous ethanol solution to obtain 3,3'-disodium disulfonate-4,4'-difluorobenzophenone represented by the above general formula (G2). The purity is 99.3%.

[0234]

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Abstract

Provided are a composite polymer electrolytic membrane that has excellent proton conductivity even under low-humidification and low-temperature conditions, a small dimensional change rate, and excellent mechanical strength and chemical stability, and that is capable of achieving a high output and excellent physical durability when being used in a solid polymer fuel cell; and a membrane electrode composite and a solid polymer fuel cell using the composite polymer electrolytic membrane. This composite polymer electrolytic membrane has a composite layer formed by combining a polyazole-containingnanofiber unwoven fabric (A) and an ionic-group-containing polymer electrolyte (B), and is characterized in that the polyazole-containing nanofiber unwoven fabric (A) is basic.

Description

technical field [0001] The invention relates to a composite polymer electrolyte membrane with a composite layer (composite of polymer electrolyte and nanofiber non-woven fabric), a membrane-electrode complex using it, and a solid polymer fuel cell. Background technique [0002] A fuel cell is a power generation device that obtains electrical energy by electrochemically oxidizing fuels such as hydrogen and methanol, and has attracted attention as a source of clean energy in recent years. Among them, solid polymer fuel cells have a low standard operating temperature of about 100°C and high energy density, so they are expected to be widely used as power generation devices for small-scale distributed power generation facilities and mobile objects such as automobiles and ships. In addition, it is also attracting attention as a power source for small mobile devices and portable devices, and it is expected to be installed in mobile phones, personal computers, etc., instead of secon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1053H01M8/1067H01M8/1081H01M8/1086C08G65/40C08J5/04C08J5/20C08L71/08C08L79/04C08L101/12D04H1/4326D04H1/728H01B1/06H01B13/00
CPCD04H1/4326D04H1/728C08J5/046C08J5/2256C08J2371/10C08J2381/06H01B1/122H01B1/128C08G65/4056C08G65/4031C08G65/4025C09D171/10C08G73/18C08G73/22D01D5/0038D01F6/74H01M8/103H01M8/1044H01M8/1004H01M2008/1095C25B13/08C25B1/04C25B1/02C25B13/02C25B9/23Y02E60/50C01B3/50C08G65/4012H01M8/1069C08G65/40C08J5/04C08J5/20C08L71/08C08L79/04C08L101/12D04H1/4366D04H1/551H01B1/06H01B13/00H01M8/02H01M8/1081H01M8/1086Y02E60/36Y02P70/50
Inventor 冈本由明子出原大辅山口纯平白井秀典国田友之梅田浩明若元佑太伊藤达规道畑典子多罗尾隆
Owner TORAY IND INC
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