Co(II)tetramethoxyphenylporphyrin additive to PFSA PEMs for improved fuel cell durability

Patent metadata

Field	Value
Publication number	US-9325026-B2
Application number	US-201313852674-A
Country	US
Kind code	B2
Filing date	Mar 28, 2013
Priority date	Aug 31, 2009
Publication date	Apr 26, 2016
Grant date	Apr 26, 2016

Abstract

An ion conducting membrane for fuel cell applications includes an ion conducting polymer and a porphyrin-containing compound at least partially dispersed within the ion conducting polymer. The ion conducting membranes exhibit improved performance over membranes not incorporating such porphyrin-containing compounds.

First claim

What is claimed is:

1. An ion conducting membrane for fuel cell applications, the ion conducting membrane comprising:
an ion conducting polymer comprising a perfluorocyclobutyl moiety; and
a compound having the following formula:

wherein:
R 1 , R 2 , R 3 , R 4 are each independently hydrogen, substituted or unsubstituted alkyl or substituted or unsubstituted phenyl wherein the substituted alkyl and the substituted aryl have substitutions with halogens or methoxy or ethoxy; and
R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , R 12 are each independently hydrogen.

2. The ion conducting membrane of claim 1 wherein R 1 , R 2 , R 3 , R 4 , are each phenylmethoxy.

3. An ion conducting membrane for fuel cell applications, the ion conducting membrane comprising:
an ion conducting polymer comprising a perfluorocyclobutyl moiety; and
a porphyrin-containing compound having the following formula:

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+ ; and
R 1 , R 2 , R 3 , R 4 are each independently hydrogen, substituted or unsubstituted alkyl, or substituted or unsubstituted phenyl wherein the substituted alkyl and the substituted aryl have substitutions with halogens or methoxy or ethoxy; and
R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , R 12 are each independently hydrogen.

4. The ion conducting membrane of claim 3 wherein the porphyrin-containing compound is Co(II)tetramethoxyphenylporphyrin.

Assignees

• Gm Global Tech Operations Inc

Inventors

• Schoeneweiss Michael R
• Fuller Timothy J
• Coms Frank
• Mackinnon Sean M

Classifications

• H01M8/1048

  Ion-conducting additives, e.g. ion-conducting particles, heteropolyacids, metal phosphate or polybenzimidazole with phosphoric acid · CPC title

• H01M2300/0082

  Organic polymers · CPC title

• C08J2327/18

  Homopolymers or copolymers of tetrafluoroethylene · CPC title

• C07D487/22 Primary

  in which the condensed system contains four or more hetero rings · CPC title

• H01M2008/1095

  Fuel cells with polymeric electrolytes · CPC title