(IO)  Patent No.:  US 7,118,821 B2  (45)  Date of Patent:  Oct. 10, 2006  c12)  United States Patent  Hong et al.  (54)  HYDROPHILIC  POLYMER-OXIDE-PHOSPHORIC ACID  COMPOSITIONS FOR PROTON  CONDUCTING MEMBRANES  (75)  Inventors:  Wenbin Hong,  Goleta, CA (US);  Galen  D. Stucky,  Santa Barbara, CA (US);  Ken Tasaki,  Goleta, CA (US)  (73)  Assignee:  The Regents of the University of  California,  Oakland, CA (US)  ( *)  Notice:  Subject to any disclaimer, the term of this  patent is extended or adjusted under 35  U.S.C. 154(b) by  O  days.  (21)  Appl. No.:  11/083,067  (22)  Filed:  Mar. 16, 2005  (65)  Prior Publication Data  US 2006/0148953 Al  Jul. 6, 2006  Related U.S. Application Data  (60)  Provisional application No. 60/641,722, filed on Jan.  5, 2005, provisional application No. 60/656,604, filed  on Feb. 24, 2005.  (51)  Int. Cl.  HOJM 8/10  (2006.01)  (52)  U.S. Cl.  ........................  429/33;  429/314; 429/316;  252/62.2  (58)  Field of Classification Search  .................. 429/33,  429/314, 316; 252/62.2  See application file for complete search history.  (56)  References Cited  U.S. PATENT DOCUMENTS  6,878,475 Bl  *  4/2005 Wixom et al ................. 429/33  * cited by examiner  Primary Examiner-Robert  D. Harlan  (74)  Attorney, Agent, or Firm-James  M. Ritchey  (57)  ABSTRACT  27 Claims, 7 Drawing Sheets  An organic-inorganic hydrophilic polymer-oxide hybrid  proton conducting membrane (PCM) is produced from a  host organic polymer, a filler inorganic oxide, and a proton› source with a pKa less than about 5. Usually, the subject  invention comprises PCMs containing host polymer-x› strong acid-y-filler oxide, wherein xis between about 1 and  about 10 (with "x" as the molar ratio of acid anion to  polymer repeat unit) and y~about 50% (with "y" the weight  percentage of filler oxide in the composite).  US007118821B2 