IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0592643
(2000-06-13)
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발명자
/ 주소 |
- Frank, David
- Chen, Xuesong
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
13 인용 특허 :
5 |
초록
▼
A fuel cell has a proton exchange membrane. In known manner, the fuel cell includes inlets and outlets for flow of an oxidant and for flow of a fuel gas, commonly hydrogen. To deal with the issue of humidification, the invention provides a recirculation conduit including a pump connected between the
A fuel cell has a proton exchange membrane. In known manner, the fuel cell includes inlets and outlets for flow of an oxidant and for flow of a fuel gas, commonly hydrogen. To deal with the issue of humidification, the invention provides a recirculation conduit including a pump connected between the anode inlet and the anode outlet. A water separator is provided in the recirculation conduit, for separating water from fuel gas exiting the anode. A main fuel inlet is connected to the recirculation conduit, for supply of fuel. A branch conduit can be provided, to enable purge cycles and other options to be provided.
대표청구항
▼
A fuel cell has a proton exchange membrane. In known manner, the fuel cell includes inlets and outlets for flow of an oxidant and for flow of a fuel gas, commonly hydrogen. To deal with the issue of humidification, the invention provides a recirculation conduit including a pump connected between the
A fuel cell has a proton exchange membrane. In known manner, the fuel cell includes inlets and outlets for flow of an oxidant and for flow of a fuel gas, commonly hydrogen. To deal with the issue of humidification, the invention provides a recirculation conduit including a pump connected between the anode inlet and the anode outlet. A water separator is provided in the recirculation conduit, for separating water from fuel gas exiting the anode. A main fuel inlet is connected to the recirculation conduit, for supply of fuel. A branch conduit can be provided, to enable purge cycles and other options to be provided. nd cathodes are selected from the group consisting of LiNiO2,LiMn2O4,LiCoO2,LiCo0.92 Sn0.08 O2,LiCo1-xNixO2,and mixtures thereof. 10. The electrochemical cell of claim 2 wherein both the first and second cathodes comprise from between about 80 weight percent to about 98 weight percent of the respective first and second lithium-retention materials. 11. The electrochemical cell of claim 2 wherein at least one of the first and second cathodes further comprises a binder material and conductive additives. 12. The electrochemical cell of claim 11 wherein the binder material is a thermoplastic material. 13. The electrochemical cell of claim 11 wherein the conductive additives are selected from the group consisting of carbon black, graphite powder, acetylene black, aluminum powder, stainless steel powder, and mixtures thereof. 14. The electrochemical cell of claim 2 wherein the first and second cathodes comprise about 1 to 5 weight percent of a conductive additive, about 1 to 5 weight percent of a binder material and about 80 to 98 weight percent of the respective first and second lithium-retention materials. 15. The electrochemical cell of claim 2 wherein the first and second cathodes are in the form of plates, each having a thickness in the range of from about 0.001 inches to about 0.020 inches. 16. The electrochemical cell of claim 15 wherein a first electrochemical couple comprises portions of the anode disposed adjacent to opposite sides of the first cathode and wherein a second electrochemical couple comprises portions of the anode disposed adjacent to opposed sides of the second cathode. 17. The electrochemical cell of claim 2 wherein a casing houses the anode and the associated first cathode as a first electrochemical couple dischargeable under a substantially constant discharge application, the first couple comprising: i) the anode comprising a carbonaceous material; and ii) the first lithium-retention material of the first cathode selected from the group consisting of LiNiO2,LiMn2O4,LiCoO2,LiCo0.92 Sn0.08 O2,LiCo1-xNixO2,and mixtures thereof; and wherein the casing further houses the anode and the associated second cathode as a second electrochemical couple dischargeable under a current pulse discharge application, the second couple comprising: i) the anode; and ii) the second lithium-retention material of the second cathode selected from the group consisting of LiNiO2,LiMn2O4,LiCoO2,LiCo0.92 Sn0.08 O2,LiCo1-xNixO2,and mixtures thereof. 18. The electrochemical cell of claim 1 wherein the first region contributes greater than 10% of the total energy density of the cell while the first structure of the second electrode provides less than 50% of the total surface area of the second electrode. 19. The electrochemical cell of claim 1 wherein the first electrode is the anode and the second electrode is the cathode. 20. The electrochemical cell of claim 1 wherein the first region of the cell has greater than 10% of the total energy density of the cell while the first structure of the second electrode provides less than 30% of the total surface area of the second electrode. 21. The electrochemical cell of claim 1 including a conductive casing serving as a terminal for the first electrode and wherein the first structure of the second electrode is connected to a first terminal lead and the second structure of the second electrode is connected to a second terminal lead, the first and second terminal leads being insulated from the casing and from each other. 22. The electrochemical cell of claim 1 wherein the first electrode is a carbonaceous anode and the second electrode is a lithium-retention cathod
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