Hybrid thin film/thick film solid oxide fuel cell and method of manufacturing the same
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01M-008/10
출원번호
US-0839956
(2001-04-19)
발명자
/ 주소
Kearl, Daniel A.
출원인 / 주소
Hewlett-Packard Development Company, L.P.
인용정보
피인용 횟수 :
71인용 특허 :
22
초록▼
A SOFC providing higher power densities than PEM-based cells; the possibility of direct oxidation and/or internal reforming of fuel; and reduced SOFC operating temperatures. The SOFC comprises a thin film electrolyte layer. A thick film anode layer is disposed on one surface of the electrolyte layer
A SOFC providing higher power densities than PEM-based cells; the possibility of direct oxidation and/or internal reforming of fuel; and reduced SOFC operating temperatures. The SOFC comprises a thin film electrolyte layer. A thick film anode layer is disposed on one surface of the electrolyte layer; and a thick film cathode layer is disposed on the opposite surface of the electrolyte layer. A method of making the SOFC comprises the steps of: creating a well in one side of a dielectric or semiconductor substrate; depositing a thin film solid oxide electrolyte layer on the surface of the well; applying a thick film electrode layer in the electrolyte coated well; creating a counter well in the opposite side of the substrate, the counter well abutting the electrolyte layer; and applying a thick film counter electrode layer in the counter well.
대표청구항▼
A SOFC providing higher power densities than PEM-based cells; the possibility of direct oxidation and/or internal reforming of fuel; and reduced SOFC operating temperatures. The SOFC comprises a thin film electrolyte layer. A thick film anode layer is disposed on one surface of the electrolyte layer
A SOFC providing higher power densities than PEM-based cells; the possibility of direct oxidation and/or internal reforming of fuel; and reduced SOFC operating temperatures. The SOFC comprises a thin film electrolyte layer. A thick film anode layer is disposed on one surface of the electrolyte layer; and a thick film cathode layer is disposed on the opposite surface of the electrolyte layer. A method of making the SOFC comprises the steps of: creating a well in one side of a dielectric or semiconductor substrate; depositing a thin film solid oxide electrolyte layer on the surface of the well; applying a thick film electrode layer in the electrolyte coated well; creating a counter well in the opposite side of the substrate, the counter well abutting the electrolyte layer; and applying a thick film counter electrode layer in the counter well. further comprising a plurality of sequenced continuous cells, continuous separator plates, interconnects, fuel supply members, oxidant gas supply members, and two continuous end plates. 16. The fuel cell stack of claim 3, wherein each of the fuel and oxidant gas supply members is comprised of a distribution section and a tube section. 17. The fuel cell stack of claim 16, wherein the distribution section is a chamber defined by a side wall enclosed by upper and lower surfaces, and wherein a first end of the tube is connected to the side wall so as to establish fluid communication with the distribution section. 18. The fuel cell stack of claim 17, wherein the side wall is a porous side wall allowing oxidant gas or fuel passage from the chamber. 19. The fuel cell stack of claim 17, wherein the side wall is a circular side wall. 20. The fuel cell stack of claim 16, wherein the distribution section is a porous gas diffuser. 21. The fuel cell stack of claim 19, wherein the distribution section of the fluid supply member is placed into the inner cavity of the first interconnect layer. 22. The fuel cell stack of claim 21, wherein the tube of the fuel supply member is radially extended between the distribution section and the outer edge where a second end of the tube of the fuel supply member is connected to the external fuel supply manifold, thereby establishing fluid communication between the distribution section and the external fuel manifold so that the fuel from the fuel manifold is distributed by the distribution section into the first interconnect layer over essentially 360°. 23. The fuel cell stack of claim 19, wherein the distribution section of the oxidant gas supply member is placed into the inner cavity of the second interconnect layer. 24. The fuel cell stack of claim 23, wherein the tube of the oxidant gas supply member is radially extended between the distribution section and the outer edge where a second end of the tube of the oxidant gas supply member is connected to the external oxidant gas supply manifold, thereby establishing fluid communication between the distribution section and the external oxidant gas manifold so that the oxidant gas from the oxidant gas manifold is distributed by the distribution section into the second interconnect layer over essentially 360°. 25. The fuel cell stack of claim 1, wherein the first and second interconnect layers comprise circular shapes and wherein the first and the second inner cavities comprise circular shapes. 26. The fuel cell stack of claim 3, wherein the first interconnect is for the anode side of each cell in the stack system, and wherein the first interconnect is made of nickel foam. 27. The fuel cell stack of claim 17, wherein the tube is made of metal. 28. The fuel cell stack of claim 27, wherein the metal tube is electrically insulated with an insulation material. 29. The fuel cell stack of claim 26 wherein the insulation material is tubular ceramic. 30. A process for forming a fuel cell stack, comprising: providing a first interconnect layer having a first inner cavity; disposing a continuous cell over the first interconnect layer; disposing a second interconnect layer having a second inner cavity on the continuous cell; connecting the first inner cavity of the first interconnect layer to a fuel manifold located external to the fuel cell stack; and connecting the second inner cavity of the second interconnect layer to an oxidant gas manifold located external to the fuel cell stack. 31. The process of claim 30, further comprising disposing a first continuous end plate to the first interconnect. 32. The process of claim 30, further comprising disposing a second continuous end plate on the second interconnect layer. 33. The process of claim 31, further comprising: placing a fuel supply member in the first inner cavity of the first interconnect layer; and connecting the fuel supply member to the fuel manifold located external to the fuel cell stack, wher ein the fuel supply member radially extends between the first inner cavity of the first interconnect layer and the fuel manifold. 34. The process of claim 33, further comprising supplying fuel to a distribution section of the fuel supply member, wherein the distribution section is fluid permeable. 35. The process of claim 34, further comprising distributing the fuel into the first interconnect layer through the distribution section of the fuel supply member. 36. The process of claim 31, further comprising: placing an oxidant gas supply member in the second inner cavity of the second interconnect layer; and connecting the oxidant gas supply member to the oxidant gas manifold located external to the fuel cell stack, wherein the oxidant gas supply member radially extends between the inner cavity of the second interconnect layer and the oxidant gas manifold. 37. The process of claim 36, further comprising supplying oxidant gas into a distribution section of the oxidant gas supply member, wherein the distribution section is fluid permeable. 38. The process of claim 37, further comprising distributing the oxidant gas into the second interconnect layer through the distribution section of the oxidant gas supply member.
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