Proton-conducting polymer with acid groups in side chains,...

Details Proton-conducting polymer with acid groups in side chains,... Proton-conducting polymer with acid groups in side chains,...

2005-10-18

2005-10-18

Woodward, Ana (Department: 1711)

Gas separation: apparatus

Apparatus for selective diffusion of gases

Membrane having ring containing organic compound

C429S006000, C429S006000, C525S434000, C525S436000

Reexamination Certificate

active

06955712

ABSTRACT:
A proton-conducting polymer, a preparation method thereof, a polymer membrane manufactured from the proton-conducting polymer, and a fuel cell having the polymer membrane are provided. The proton-conducting polymer contains an acid-bearable aromatic group covalently bonded to its polyimide backbone and a proton-conducting acid group attached to the aromatic group. A polymer membrane manufactured from the proton-conducting polymer has greater mechanical strength and ionic (protonic) conductivity than existing sulfonated polyimide membranes and thus improves the performance of fuel cells. In addition, the proton-conducting polymer membrane is low cost, enabling automobile fuel cells to be commercialized. Since the proton-conducting polymer membrane is less permeable to methanol, it can be used effectively for DMFCs without causing cell performance degradation.

REFERENCES:
patent: 6245881 (2001-06-01), Faure et al.
patent: 2002121281 (2002-04-01), None

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