Granted Patent B2

US 8,409,765 · App. 12/551,284 · Granted Apr 2, 2013

Abstract

Claims (12)

1. An ion conducting membrane for fuel cell applications, the ion conducting membrane comprising:

an ion conducting polymer including a sulfonated tetrafluoroethylene-based fluoropolymer-copolymer; and

a porphyrin-containing compound, wherein the porphyrin-containing compound includes a moiety having formula 1:

wherein:

R 1 , R 2 , R 3 , R 4 are each independently phenylmethoxy and R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , R 12 are each independently hydrogen, alkyl, or aryl.

2. The ion conducting membrane of claim 1 wherein R 1 , R 2 , R 3 , R 4 , are each independently substituted or unsubstituted alkyl or phenyl.

3. The ion conducting membrane of claim 1 wherein R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , R 12 are each hydrogen.

4. The ion conducting membrane of claim 1 wherein the porphyrin-containing compound has formula 2:

wherein M is Co 2+ , Co 3+ , Fe 2+ , Fe 3+ , Mg 1+ , Mg 2+ , Mn 1+ , Mn 2+ , Mn 3+ , ClMn 3+ , HOMn 3+ , Cu +1 , Cu 2+ ,Ni 1+ , Ni 2+ , Pd 1+ , Pd 2+ , Ru 1+ , Ru 2+ , Ru 4+ , Vn 4+ , Zn 1+ , Zn 2+ , Al 3+ , B, Si(OH) 2 2+ , Al 3+ , HOIn 3+ , HOIn 3+ , Pb 2+ , Ag + , Sn 2+ , Sn 4+ , Ti 3+ , Ti 4+ , VO + , Pt 2+ , Ce 3+ , or Ce 4+ .

5. The ion conducting membrane of claim 1 wherein the porphyrin-containing compound is Co(II)tetramethoxyphenylporphyrin.

6. The ion conducting membrane of claim 1 wherein the sulfonated tetrafluoroethylene-based fluoropolymer-copolymer includes a perfluorocyclobutyl moiety.

7. The ion conducting membrane of claim 1 wherein the porphyrin-containing compound is present in an amount from about 0.001 to 50 weight percent of the total weight of the ion conducting membrane.

Assignments (8)