Methods of making membrane electrode assemblies
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01M-004/88
H01M-008/10
H01M-008/02
출원번호
US-0321466
(2009-01-20)
등록번호
US-9093685
(2015-07-28)
발명자
/ 주소
Kim, Yu Seung
Lee, Kwan-Soo
Rockward, Tommy Q. T.
출원인 / 주소
LOS ALAMOS NATIONAL SECURITY, LLC
대리인 / 주소
Borkowsky, Samuel L.
인용정보
피인용 횟수 :
0인용 특허 :
9
초록▼
Method of making a membrane electrode assembly comprising: providing a membrane comprising a perfluorinated sulfonic acid; providing a first transfer substrate; applying to a surface of the first transfer substrate a first ink, said first ink comprising an ionomer and a catalyst; applying to the fir
Method of making a membrane electrode assembly comprising: providing a membrane comprising a perfluorinated sulfonic acid; providing a first transfer substrate; applying to a surface of the first transfer substrate a first ink, said first ink comprising an ionomer and a catalyst; applying to the first ink a suitable non-aqueous swelling agent; forming an assembly comprising: the membrane; and the first transfer substrate, wherein the surface of the first transfer substrate comprising the first ink and the non-aqueous swelling agent is disposed upon one surface of the membrane; and heating the assembly at a temperature of 150° C. or less and at a pressure of from about 250 kPa to about 3000 kPa or less for a time suitable to allow substantially complete transfer of the first ink and the second ink to the membrane; and cooling the assembly to room temperature and removing the first transfer substrate and the second transfer substrate.
대표청구항▼
1. A method of making a membrane electrode assembly, the method comprising steps of: applying a first ink to a surface of a first transfer substrate, the first ink comprising a protonated ionomer and a catalyst;drying the applied first ink by baking;applying to the dried first ink a suitable non-aqu
1. A method of making a membrane electrode assembly, the method comprising steps of: applying a first ink to a surface of a first transfer substrate, the first ink comprising a protonated ionomer and a catalyst;drying the applied first ink by baking;applying to the dried first ink a suitable non-aqueous swelling agent selected from the group consisting of n-propanol, 1,5-pentanediol, and dimethyl acetamide;forming an assembly of the first transfer substrate and a membrane by contacting a first surface of the membrane with the first ink via the applied swelling agent, the membrane comprising a protonated perfluorinated sulfonic acid;hot-pressing the assembly at a temperature in a range from about 30° C. to about 90° C. and at a pressure of from about 250 kPa to about 3000 kPa for a length of time resulting in substantially complete transfer the first ink to the membrane;cooling the hot-pressed assembly to room temperature; andremoving the first transfer substrate. 2. The method of claim 1, further comprising: applying a second ink to a surface of a second transfer substrate, the second ink comprising a protonated ionomer and a catalyst;drying the applied second ink by baking;applying to the dried second ink a suitable non-aqueous swelling agent selected from the group consisting of n-propanol, 1,5-pentanediol, and dimethyl acetamide;prior to said hot-pressing, forming the assembly to also comprise the second transfer substrate by contacting an opposing second surface of the membrane with the second ink via the applied non-aqueous swelling agent; andafter said hot-pressing, also removing the second transfer substrate after cooling the assembly to room temperature. 3. The method of claim 2, further comprising applying a releasing agent to the first transfer substrate, the second transfer substrate, or both. 4. The method of claim 2, wherein the non-aqueous swelling agent applied to each of the dried first and second inks is n-propanol and the hot-pressing temperature is 30° C. 5. The method of claim 2, wherein the non-aqueous swelling agent applied to each of the dried first and second inks is dimethyl acetamide and the hot-pressing temperature is 70° C. 6. The method of claim 2, wherein the non-aqueous swelling agent applied to each of the dried first and second inks is 1,5-pentanediol and the hot-pressing temperature is 90° C. 7. The method of claim 2, wherein one of the first and second inks is a cathode ink and the other of the first and second inks is an anode ink. 8. The method of claim 1, wherein the non-aqueous swelling agent is n-propanol and the hot-pressing temperature is about 30° C. 9. The method of claim 1, wherein the non-aqueous swelling agent is 1,5-pentanediol and the hot-pressing temperature is about 90° C. 10. The method of claim 1, wherein the non-aqueous swelling agent is dimethyl acetamide and the hot-pressing temperature is 70° C. 11. The method of claim 1, wherein the hot-pressing time is about 6 minutes. 12. The method of claim 1, wherein the hot-pressing pressure is about 500 kPa to about 3000 kPa. 13. A method of making a membrane electrode assembly, the method comprising steps of: applying a first ink to a surface of a first transfer substrate, the first ink comprising an ionomer salt and a catalyst;drying the applied first ink by baking;applying to the dried first ink a suitable non-aqueous swelling agent selected from the group consisting of n-propanol, 1,5-pentanediol, acetone, dimethyl acetamide, and N-methyl pyrrolidone;forming an assembly of the first transfer substrate and a membrane by contacting a first surface of the membrane with the first ink via the applied non-aqueous swelling agent, the membrane comprising a salt of perfluorinated sulfonic acid;hot-pressing the assembly at a temperature in a range from about 30° C. to about 125° C. and at a pressure of from about 250 kPa to about 3000 kPa for a length of time resulting in substantially complete transfer the first ink to the membrane;cooling the hot-pressed assembly to room temperature; andremoving the first transfer substrate. 14. The method of claim 13, further comprising: applying a second ink to a surface of a second transfer substrate, the second ink comprising an ionomer salt and a catalyst;drying the applied second ink by baking;applying to the dried second ink a suitable non-aqueous swelling agent selected from the group consisting of n-propanol, 1,5-pentanediol, acetone, dimethyl acetamide, and N-methyl pyrrolidone;prior to said hot-pressing, forming the assembly to also comprise the second transfer substrate by contacting an opposing second surface of the membrane with the second ink via the applied swelling agent; andafter said hot-pressing, also removing the second transfer substrate after cooling the assembly to room temperature. 15. The method of claim 14, wherein the non-aqueous swelling agent applied to each of the dried first and second inks is n-propanol and the temperature is 40° C. 16. The method of claim 14, wherein the non-aqueous swelling agent applied to each of the dried first and second inks is 1,5-pentanediol and the hot-pressing temperature is 100° C. 17. The method of claim 14, wherein the non-aqueous swelling agent applied to each of the dried first and second inks is acetone and the hot-pressing temperature is 30° C. 18. The method of claim 14, wherein the non-aqueous swelling agent applied to each of the dried first and second inks is dimethyl acetamide and the hot-pressing temperature is 30° C. 19. The method of claim 14, wherein the non-aqueous swelling agent applied to each of the dried first and second inks is N-methyl pyrrolidone and the hot-pressing temperature is 125° C. 20. The method of claim 14, wherein one of the first and second inks is a cathode ink and the other of the first and second inks is an anode ink. 21. The method of claim 14, further comprising applying a releasing agent to the first transfer substrate, the second transfer substrate, or both. 22. The method of claim 13, wherein the non-aqueous swelling agent is acetone and the hot-pressing temperature is from about 30° C. to about 50° C. 23. The method of claim 13, wherein the salt of the perfluorinated sulfonic is a sodium salt, a potassium salt, or combinations thereof. 24. The method of claim 13, wherein the non-aqueous swelling agent is n-propanol and the hot-pressing temperature is from about 30° C. to about 50° C. 25. The method of claim 13, wherein the non-aqueous swelling agent is n-propanol and the hot-pressing temperature is about 40° C. 26. The method of claim 13, wherein the non-aqueous swelling agent is 1,5-pentanediol and the hot-pressing temperature is from about 80° C. to about 120° C. 27. The method of claim 13, wherein the non-aqueous swelling agent is 1,5-pentanediol and the hot-pressing temperature is 100° C. 28. The method of claim 13, wherein the non-aqueous swelling agent is acetone and the hot-pressing temperature is 30° C. 29. The method of claim 13, wherein the non-aqueous swelling agent is dimethyl acetamide and the hot-pressing temperature is 30° C. 30. The method of claim 13, wherein the non-aqueous swelling agent is N-methyl pyrrolidone and the hot-pressing temperature is 125° C. 31. The method of claim 13, wherein the hot-pressing time is in a range from about 6-10 minutes. 32. The method of claim 13, wherein the hot-pressing pressure is about 1000 kPa.
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