US 6,680,138 B1 · Proton-conducting membrane, method for producing the same, and fuel cell using the same

Abstract

It is an object of the present invention to provide a proton-conducting membrane excellent in resistance to heat and durability and showing excellent proton conductivity at high temperature. It is another object of the present invention to provide a method for producing the same and fuel cell using the same. The present invention provides a proton-conducting membrane, comprising an organic material (A), three-dimensionally crosslinked structure (B) containing a specific metal-oxygen bond, agent (C) for imparting proton conductivity, and water (D), wherein the organic material (A) has a number-average molecular weight of 56 to 30,000, and at least 4 carbon atoms connected in series in the main chain, and the organic material (A) and three-dimensionally crosslinked structure (B) are bound to each other via a covalent bond.

Claims22

Dependent claims

A proton-conducting membrane, comprising:

(A) an organic material having a main chain, which comprises a polytetramethylene oxide or a polymethylene;
(B) a three-dimensionally crosslinked structure containing a specific metal-oxygen bond;
(C) an agent for imparting proton conductivity;
and
(D) water, wherein:
(i) said organic material (A) has a number-average molecular weight of 56 to 30,000, and at least 4 carbon atoms connected in series in the main chain;
and
(ii) said organic material (A) and three-dimensionally crosslinked structure (B) are bound to each other via a covalent bond.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

09/662,909Filed 15 Sep 2000

Granted

20 Jan 2004

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

C08J 5/2256
Synthetic macromolecular compounds: based on macromolecular compounds obtained by reactions other than those involving carbon-to-carbon bonds,…
H01M 8/1023
Characterised by the chemical structure of the main chain of the ion-conducting polymer: having only carbon, e.g. polyarylenes, polystyrenes or…
H01M 8/1025
Characterised by the chemical structure of the main chain of the ion-conducting polymer: having only carbon and oxygen, e.g. polyethers,…
H01M 8/1037
Characterised by the chemical structure of the main chain of the ion-conducting polymer: having silicon, e.g. sulfonated crosslinked…

Proton-conducting membrane, method for producing the same, and fuel cell using the same

Life of this patent

Proton-conducting membrane, method for producing the same, and fuel cell using the same

Life of this patent

Abstract

Claims22