content_image/935728.jpg
# 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 

(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) 

## Related U.S. Application Data 

<img src='content_image/935728.jpg'>

# (IO) Patent No.: US 7,118,821 B2 

# (45) Date of Patent: Oct. 10, 2006 

(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 

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 

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 

## U.S. PATENT DOCUMENTS 

## 27 Claims, 7 Drawing Sheets 

