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Polymer electrolyte, polymer electrolyte membrane, membrane-electrode assembly, and solid polymer fuel cell

A polymer and electrolyte technology, applied in the direction of solid electrolyte fuel cells, fuel cells, fuel cell components, etc., can solve the problems of polymer electrolyte membrane, excellent durability and heat resistance, etc., and achieve excellent starting characteristics , excellent durability and heat resistance, the effect of excellent performance

Inactive Publication Date: 2010-03-24
KURARAY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Therefore, the actual situation is that in polymer electrolyte fuel cells, there has not been proposed a polymer electrolyte membrane for polymer electrolyte fuel cells that can operate stably under long-term operation, and has durability and heat resistance excellent

Method used

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  • Polymer electrolyte, polymer electrolyte membrane, membrane-electrode assembly, and solid polymer fuel cell
  • Polymer electrolyte, polymer electrolyte membrane, membrane-electrode assembly, and solid polymer fuel cell
  • Polymer electrolyte, polymer electrolyte membrane, membrane-electrode assembly, and solid polymer fuel cell

Examples

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Embodiment

[0119] The present invention is further specifically described below by reference examples, examples and comparative examples, but the present invention is not limited thereto at all. As chemicals (compounds, etc.) used in Reference Examples, Examples, and Comparative Examples, those with the highest purity available were used, and those that were sufficiently degassed were used for solvents.

[0120] Confirmation of the structure of the products (intermediate compounds, final compounds) obtained in the Reference Examples, determination of the number average molecular weight of the polymers obtained in the Examples and Comparative Examples, and measurement of the polymer electrolytes or polymers obtained in the Examples and Comparative Examples were performed as follows The ion exchange capacity, membrane strength, ionic conductivity, linear expansion coefficient and methanol permeation rate of the electrolyte membrane and the dynamic mechanical test of the polymer electrolyte ...

reference example 1

[0144] Preparation of 1-(4-vinylphenyl)adamantane

[0145] 1-(4-Vinylphenyl)adamantane (20 g) was synthesized in the same manner as described in JP-A-2006-96988.

Embodiment 1

[0147] (a) comprising polystyrene (polymer block (A)), hydrogenated polyisoprene (polymer block (B)) and poly[1-(4-vinylphenyl)adamantane] (polymer Synthesis of block copolymers of object block (C))

[0148] After putting 526ml of dehydrated cyclohexane and 2.89ml of sec-butyllithium (1.3M cyclohexane solution) into a 1,400ml autoclave, add 1-(4-vinylphenyl)adamantane in cyclohexane solution (1 -(4-vinylphenyl) adamantane: 27g, cyclohexane: 200ml), 27.5ml styrene and 70.4ml isoprene, make them each carry out polymerization at 45 ℃, then add phenyl benzoate in 35.3 ml of a 3% by mass solution in cyclohexane to perform a coupling reaction, thereby synthesizing poly(1-(4-vinylphenyl)adamantane)-b-polystyrene-b-polyisoprene- b-polystyrene-b-poly(1-(4-vinylphenyl)adamantane) (hereinafter abbreviated as AdSSISAdS). The number average molecular weight (measured by GPC, converted to polystyrene) of the obtained AdSSISAdS was 136,400, which was obtained by 1 H-NMR measurement determ...

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Abstract

The invention discloses a polymer electrolyte which comprises, as the main component, a block / graft copolymer comprising, as constituent components, polymer blocks (A), (B) and (C) which cause phase-separation from one another, wherein the polymer block (A) comprises a vinyl compound unit as the main repeating unit and has an ion-conductive group, the polymer block (B) comprises a vinyl compound unit capable of forming a flexible phase as the main repeating unit and forms a flexible phase, and the polymer block (C) comprises a styrene derivative unit carrying an alicyclic hydrocarbon group having a polycyclic structure as the main repeating unit and forms a restrained phase; a membrane; a membrane-electrode assembly; and a solid polymer fuel cell. The polymer electrolyte has excellent durability and heat resistance, and shows little change in properties, such as the change in dimension between a dried state and a wet state, the change in mechanical properties and the change in methanolcross-over before and after the immersion in a methanol solution. The polymer electrolyte can be used stably in a solid polymer fuel cell during the long-term operation of the solid polymer fuel celland enables excellent start-up performance of the solid polymer fuel cell.

Description

technical field [0001] The present invention relates to a polymer electrolyte excellent in durability and heat resistance, a polymer electrolyte membrane including the polymer electrolyte, and a membrane electrode assembly and a polymer electrolyte fuel cell in which the polymer electrolyte membrane is used. Background technique [0002] In recent years, fuel cell technology has attracted attention as a fundamental solution to energy and / or environmental problems, and further as a major energy conversion system in the future hydrogen era. In particular, the polymer electrolyte fuel cell (PEFC) has been tried to be used as a power source for electric vehicles, a power source for portable devices due to its miniaturization and light weight, and has been further applied to household stationary power devices that utilize both electricity and heat. . [0003] A polymer electrolyte fuel cell is generally constituted as follows. On both sides of a polymer electrolyte membrane hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02C08F297/04H01B1/06H01M8/10
CPCC08J2353/02H01M8/1027B01D71/80H01M8/04261H01M8/1034H01B1/128H01M8/1032H01B1/122C08F8/36C08J5/2231H01M2008/1095B01D71/78H01M8/103C08J2325/08Y02E60/523H01M2300/0082B01D71/28H01M8/102C08F297/046B01D71/26C08F8/04H01M8/04197Y02E60/50B01D71/281H01M8/02C08F297/04H01M4/86H01B1/06
Inventor 大木弘之小野友裕中井慎二仲野武史石曾根隆
Owner KURARAY CO LTD
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