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Proton conduction film

A proton-conducting membrane and ion-conducting technology, applied in the field of proton-conducting membranes, can solve problems such as ion conductivity decline

Inactive Publication Date: 2007-01-03
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the ion conductivity is greatly reduced due to the drying of water under low humidity conditions, or the freezing of water under low temperature conditions, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0181] (modulation of oligomers)

[0182] Add 67.3g (0.20 moles) of 2,2-bis(4-hydrobenzene)-1,1 to a 1L three-necked Erlenmeyer flask equipped with a stirrer, a thermometer, a cooling pipe, a Dean-Stark pipe, and a three-way valve for introducing nitrogen, 1,3,3,3-hexafluoropropane, 60.3g (0.24 mol) of 4,4'-dichlorobenzophenone (4,4'-DCBP), 71.9g (0.52 mol) of potassium carbonate, 300mL of N , N-dimethylacetamide (DMAc), and 150 mL of toluene were heated and stirred in an oil bath under a nitrogen atmosphere, and the reaction was carried out at 130° C. When the water and toluene generated by the reaction were azeotropically removed from the reaction system through the Dean-Stark tube to carry out the reaction, it was confirmed that almost no water was generated after about 3 hours. The reaction temperature was slowly increased from 130 to 150°C. Then, in the process of slowly increasing the reaction temperature to 150°C, remove most of the toluene, and continue the reaction ...

Synthetic example 2

[0188] Modulation of Polyarene Polymer Using Neopentyl as Protecting Group

[0189] Add 39.58g (98.64mmol) of 3-(2,5-Di Neopentyl benzenesulfonate, and 15.23 g (1.36 mmol) of the BCPAF oligomer (Mn=11200) prepared in Synthesis Example 1, 1.67 g (2.55 mmol) of Ni(PPh 3 ) 2 Cl 2 , 10.49g (40 mmol) of PPh 3 , 0.45 g (3 mmol) of NaI, 15.69 g (240 mmol) of zinc powder, 390 mL of dry NMP. Under the condition of stirring the reaction system, it was heated (finally heated to 75° C.) for 3 hours. Dilute the polymerization reaction liquid with 250 mL of THF, stir for 30 minutes, use celite as a filter aid, filter, and pour the filtered liquid into excess 1500 mL of methanol to make it solidify. The coagulum was collected by filtration, air-dried and redissolved in THF / NMP (200 / 300mL, respectively), and coagulated and precipitated with an excess of 1500mL methanol. After air-drying, 47.0 g (recovery rate 99%) of the desired yellow fibrous, neopentyl-protected, sulfone derivative co...

Synthetic example 3

[0195] (synthesis of oligomers)

[0196]Use 103.7g (0.48mol) of 4,4'-dihydrobenzophenone (4,4'-DHBP), 148.2g (0.52mol) of 4,4'-dichlorodiphenylsulfone (4,4'-DCDS ), 86.9g (0.63mol) of potassium carbonate, 500mL of 1,3-dimethyl-2-imidazolethane (DMI), 200mL of toluene, and the same steps as in Synthesis Example 1 to carry out the reaction operation to obtain the target compound 180g ( Recovery rate 78%).

[0197] The number average molecular weight of the obtained polymer was 13,700 in terms of polyethylene as determined by GPC (THF solvent). In addition, the obtained polymer is soluble in NMP, DMAc, DMI, etc., has a Tg of 159°C, and a thermal decomposition temperature of 500°C.

[0198] The obtained compound is presumed to be an oligomer having a structure represented by formula (III) (hereinafter will be referred to as "C oligomer").

[0199] "Chemical 23"

[0200]

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Abstract

(Object) A proton conductive membrane capable of sufficient proton conductivity even at low humidities and low temperatures is provided. (Means for solution) The proton conductive membrane includes a copolymer including an ion conductive polymer segment (A) and an ion nonconductive polymer segment (B), the membrane absorbing water when it is soaked in 90°C water for 30 minutes of which the quantity of water showing freezing temperatures in the range of -30 to 0°C is 0.01 to 3.0 gbasedon 1 g of the copolymer. The copolymer has a structure in which main chain skeletons of the copolymer are covalently bound at aromatic rings thereof through binding groups.

Description

technical field [0001] The present invention relates to a proton conducting membrane suitable for use as an electrolyte of a solid polymer fuel cell. Background technique [0002] A fuel cell basically consists of two catalyst electrodes and a solid electrolyte membrane sandwiched between the electrodes. Hydrogen as fuel is electrolyzed by one electrode, and the hydrogen ions diffuse through the solid electrolyte membrane and combine with oxygen at the other electrode. At this time, if the two electrodes are connected in an external circuit, a current is generated to supply power to the external circuit. Here, the solid electrolyte membrane plays a role of physically separating hydrogen and oxygen in the fuel gas and blocking the flow of electrons while diffusing hydrogen ions. [0003] Such a solid electrolyte membrane diffuses hydrogen ions through water bundles formed in hydrophilic channels (ion-conducting channels). Therefore, there is a problem that ion conductivity...

Claims

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Application Information

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IPC IPC(8): C08J5/22C08G61/00H01B1/06H01B13/00H01M8/02H01M8/10C08L101/00C08G61/02H01B1/12
CPCH01M8/1027H01M8/1039H01M8/1032H01B1/122C08G61/02H01M8/1067H01M8/0291C08J5/2256H01M8/103Y02E60/523C08G61/00C08J2365/02H01M8/1025H01M8/0289C08J5/22H01M8/02
Inventor 川井淳司椎桥透后藤幸平
Owner JSR CORPORATIOON
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