Porous carbon body for a fuel cell having an electronically conductive hydrophilic agent
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01J-021/18
B01J-031/00
C01B-031/00
D01F-009/12
C01D-003/00
출원번호
US-0034884
(2001-12-27)
발명자
/ 주소
Hertel, Christopher J.
Bett, John A. S.
Lamm, Foster P.
Reiser, Carl A.
출원인 / 주소
UTC Fuel Cells, LLC
대리인 / 주소
Chisholm, Jr., Malcolm J.
인용정보
피인용 횟수 :
6인용 특허 :
13
초록▼
The invention is a porous carbon body for a fuel cell having an electronically conductive hydrophilic agent and method of manufacture of the body. The porous carbon body comprises an electronically conductive graphite powder in an amount of between 60%-80% by weight of the body; a carbon fiber in an
The invention is a porous carbon body for a fuel cell having an electronically conductive hydrophilic agent and method of manufacture of the body. The porous carbon body comprises an electronically conductive graphite powder in an amount of between 60%-80% by weight of the body; a carbon fiber in an amount of between 5%-15% by weight of the body; a thermoset binder in an amount of between 6%-18% by weight of the body; and, a modified carbon black electronically conductive hydrophilic agent in an amount of between 2%-20% by weight of the body. The body provides for increased wettability without any decrease in electrical conductivity, and also provides for an efficient manufacture without any need for high temperature, costly steps to graphitize the body, or to incorporate post molding hydrophilic agents into pores of the body.
대표청구항▼
1. A porous carbon body having an electronically conductive hydrophilic agent for use in an electrochemical cell, the body comprising: a. an electronically conductive graphite powder in an amount of between 67%-87% by weight of the body; b. a thermoset binder in an amount of between 6%-18% by w
1. A porous carbon body having an electronically conductive hydrophilic agent for use in an electrochemical cell, the body comprising: a. an electronically conductive graphite powder in an amount of between 67%-87% by weight of the body; b. a thermoset binder in an amount of between 6%-18% by weight of the body; and, c. a modified carbon black electronically conductive hydrophilic agent in an amount of between 2%-20% by weight of the body, the modified carbon black being carbon having attached at least one organic group, the organic group comprising i.) at least one aromatic group or a C 1-C12alkyl group, and ii.) at least one ionic group, one ionizable group, or a mixture of an ionic group and an ionizable group wherein the ionic or the ionizable group is a sulfonic acid or a salt thereof, wherein the at least one aromatic group or C1-C12alkyl of the organic group is directly attached to the carbon, and the organic group is present at a level of from about 0.10 to about 4.0 micromoles/m2of the carbon used based on the nitrogen surface area of the carbon.2. The porous carbon body of claim 1, wherein the body has a mean pore size of greater than 2.0 microns, and an open porosity of greater than 25% of the body.3. The porous carbon body of claim 1, wherein the body has a bubble pressure of greater than 5 pounds per square inch.4. The porous carbon body of claim 1, wherein the thermoset binder is a thermoset binder selected from the group consisting of a phenolic resin, a vinyl ester resin, an epoxy resin, a diallylphthalate resin, and a urethane resin.5. The porous carbon body of claim 1, wherein the pores of the body are sufficiently hydrophilic to wick fill to greater than 70% of a vacuum filled level.6. A porous carbon body having an electronically conductive hydrophilic agent for use in an electrochemical cell comprising: a. an electronically conductive graphite powder in an amount of between 60%-80% by weight of the body; b. a carbon fiber in an amount of between 5%-15% of the body; c. a thermoset binder in an amount of between 6%-18% by weight of the body; d. a modified carbon black electronically conductive hydrophilic agent in an amount of between 2%-20% by weight of the body, the modified carbon black being carbon having attached at least one organic group, the organic group comprising i.) at least one aromatic group or a C 1-C12alkyl group, and ii.) at least one ionic group, one ionizable group, or a mixture of an ionic group and an ionizable group wherein the ionic or the ionizable group is a sulfonic acid or a salt thereof, wherein the at least one aromatic group or C1-C12alkyl of the organic group is directly attached to the carbon, and the organic group is present at a level of from about 0.10 to about 4.0 micromoles/m2of the carbon used based on the nitrogen surface area of the carbon.7. The porous carbon body of claim 6 wherein the body has a mean pore size of greater than 2.0 microns, and an open porosity of greater than 25% of the body.8. The porous carbon body of claim 6, wherein the body has a bubble pressure of greater than 5 pounds per square inch.9. The porous carbon body of claim 6, wherein the thermoset binder is a thermoset binder selected from the group consisting of a phenolic resin, a vinyl ester resin, an epoxy resin, a diallylphthalate resin, and a urethane resin.10. The porous carbon body of claim 6, wherein the pores of the body are sufficiently hydrophilic to wick fill to grater than 70% of a vacuum filled level.11. A method of forming a porous carbon body having an electronically conductive hydrophilic agent for use in an electrochemical cell, the method comprising the steps of: a. mixing together an electronically conductive graphite powder in an amount of between 67%-87% by weight of the mixture, a thermoset binder in an amount of between 6%-18% by weight of the mixture, and a modified carbon black electronically conductive hydrophilic agent in a amount of between 2% an d 20% by weight of the mixture, the modified carbon black being carbon having attached at least one organic group, the organic group comprising i.) at least one aromatic group or a C 1-C12alkyl group, and ii.) at least one ionic group, one ionizable group, or a mixture of an ionic group and an ionizable group wherein the ionic or the ionizable group is a sulfonic acid or a salt thereof, wherein the at least one aromatic group or C1-C12alkyl of the organic group is directly attached to the carbon, and the organic group is present at a level of from about 0.10 to about 4.0 micromoles/m2of the carbon used based on the nitrogen surface area of the carbon; and, b. then simultaneously compressing and heating the mixture in a mold at a pressure of between 250-1,000 pounds per square inch and at a temperature of between 300-450 degrees Fahrenheit to form a body having a mean pore size of greater than 2.0 microns and an open porosity of greater than 25%. 12. The method of claim 11, wherein the mixing together step further comprises mixing with the electronically conductive graphite powder, thermoset binder, and modified carbon black, a carbon fiber in an amount of between 5%-15% by weight of the mixture.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (13)
Nguyen, Lang H.; McElwain, Thomas E.; Shields, Jr., Samuel N.; Nagel, John F.; Smith, David D.; Menashi, Jameel, Coating compositions comprising high t-area carbon products.
Bolster Mary-Elizabeth (Clarence NY) Mazur Duane J. (Amherst NY) Weinberg Norman L. (East Amherst NY), Modified carbons and electrochemical cells containing the same.
Shaw Brenda R. (Storrs CT) Creasy Kenneth E. (Storrs CT), Modified composite electrodes with renewable surface for electrochemical applications and method of making same.
Resnick, Gennady; Allen, Glenn M.; Vance, Jr., Zebulon D.; Cipollini, Ned E., Method of treating a material to achieve sufficient hydrophilicity for making hydrophilic articles.
Hampden-Smith, Mark J.; Atanassova, Paolina; Rice, Gordon L.; Caruso, James; Brewster, James; Bhatia, Rimple; Napolitano, Paul; Gurau, Bogdan, Modified carbon products, their use in electrocatalysts and electrode layers and similar devices and methods relating to the same.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.