JP2022145221A5 - - Google Patents

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JP2022145221A5
JP2022145221A5 JP2021046530A JP2021046530A JP2022145221A5 JP 2022145221 A5 JP2022145221 A5 JP 2022145221A5 JP 2021046530 A JP2021046530 A JP 2021046530A JP 2021046530 A JP2021046530 A JP 2021046530A JP 2022145221 A5 JP2022145221 A5 JP 2022145221A5
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support
mixed layer
fuel cell
solid oxide
oxide fuel
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JP2021046530A
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JP2022145221A (en
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Priority to JP2021046530A priority Critical patent/JP2022145221A/en
Priority claimed from JP2021046530A external-priority patent/JP2022145221A/en
Priority to PCT/JP2022/000685 priority patent/WO2022196053A1/en
Publication of JP2022145221A publication Critical patent/JP2022145221A/en
Publication of JP2022145221A5 publication Critical patent/JP2022145221A5/ja
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酸化物イオン伝導性を有する固体酸化物を含む固体電解質層と、
前記固体電解質層の第1面に設けられ、電子伝導性セラミックスおよび酸化物イオン伝導性セラミックスを含む多孔体を有し、当該多孔体にアノード触媒を有するアノードと、
前記アノードの前記固体電解質層と反対側の面に設けられ、金属材料とセラミックス材料とが混合された構造を有する第1混合層と、
前記第1混合層の前記固体電解質層と反対側の面に設けられ、金属を主成分とする第1支持体と、
前記固体電解質層の第2面に設けられ、電子伝導性セラミックスおよび酸化物イオン伝導性セラミックスを含む多孔体を有し、当該多孔体にカソード触媒を有するカソードと、
前記カソードの前記固体電解質層と反対側の面に設けられ、金属材料とセラミックス材料とが混合された構造を有する第2混合層と、
前記第2混合層の前記固体電解質層と反対側の面に設けられ、金属を主成分とする第2支持体と、を備え
前記第1支持体における空隙率、前記第1混合層における空隙率、および前記アノードにおける空隙率の間には、前記第1支持体>前記第1混合層>前記アノードの関係が成立し、
前記第2支持体における空隙率、前記第2混合層における空隙率、および前記カソードにおける空隙率の間には、前記第2支持体>前記第2混合層>前記カソードの関係が成立することを特徴とする固体酸化物型燃料電池。
a solid electrolyte layer including a solid oxide having oxide ion conductivity;
an anode provided on a first surface of the solid electrolyte layer, the anode having a porous body including an electron conductive ceramic and an oxide ion conductive ceramic, the porous body having an anode catalyst;
a first mixed layer provided on a surface of the anode opposite to the solid electrolyte layer and having a structure in which a metal material and a ceramic material are mixed;
a first support body mainly composed of a metal, the first support body being provided on a surface of the first mixed layer opposite to the solid electrolyte layer;
a cathode provided on a second surface of the solid electrolyte layer, the cathode having a porous body including an electron conductive ceramic and an oxide ion conductive ceramic, the porous body having a cathode catalyst;
a second mixed layer provided on a surface of the cathode opposite to the solid electrolyte layer and having a structure in which a metal material and a ceramic material are mixed;
a second support body provided on a surface of the second mixed layer opposite to the solid electrolyte layer and mainly composed of a metal ;
a relationship of the first support>the first mixed layer>the anode is established among the porosity of the first support, the porosity of the first mixed layer, and the porosity of the anode,
A solid oxide fuel cell, characterized in that the relationship between the porosity of the second support, the porosity of the second mixed layer, and the porosity of the cathode is: second support > second mixed layer > cathode .
前記固体酸化物型燃料電池の反り量は、3%未満であることを特徴とする請求項1に記載の固体酸化物型燃料電池。 The solid oxide fuel cell according to claim 1, characterized in that the amount of warping of the solid oxide fuel cell is less than 3%. 前記第1支持体、前記第1混合層、前記アノード、前記固体電解質層、前記カソード、前記第2混合層および前記第2支持体の外周を覆う絶縁部材を備えることを特徴とする請求項1または請求項2に記載の固体酸化物型燃料電池。 The solid oxide fuel cell according to claim 1 or 2, characterized in that it is provided with an insulating member that covers the outer periphery of the first support, the first mixed layer, the anode, the solid electrolyte layer, the cathode, the second mixed layer, and the second support. 前記固体酸化物型燃料電池は、平面視で略矩形状を有し、
前記絶縁部材は前記第1支持体の前記第1混合層とは反対側の面および前記第2支持体の前記第2混合層とは反対側の面まで延在し、当該延在の距離を距離aとし、前記固体酸化物型燃料電池の1辺の長さを長さbとした場合に、a/bは、1/10以下であることを特徴とする請求項3に記載の固体酸化物型燃料電池。
The solid oxide fuel cell has a substantially rectangular shape in a plan view,
4. The solid oxide fuel cell according to claim 3, wherein the insulating member extends to a surface of the first support opposite the first mixed layer and a surface of the second support opposite the second mixed layer, and wherein, when the distance of the extension is distance a and the length of one side of the solid oxide fuel cell is length b, a/b is 1/10 or less.
前記絶縁部材は、ガラスであることを特徴とする請求項3または請求項4に記載の固体酸化物型燃料電池。 The solid oxide fuel cell according to claim 3 or 4, characterized in that the insulating member is glass. 前記絶縁部材は、前記第1支持体、前記第1混合層、前記アノード、前記カソード、前記第2混合層および前記第2支持体の外周から内方まで侵入していることを特徴とする請求項3から請求項5のいずれか一項に記載の固体酸化物型燃料電池。 A solid oxide fuel cell according to any one of claims 3 to 5, characterized in that the insulating member penetrates from the outer periphery to the inside of the first support, the first mixed layer, the anode, the cathode, the second mixed layer, and the second support. 前記アノード触媒は、NiおよびGDCであり、
前記カソード触媒は、PrO、LSM、LSC、GDCの少なくとも1種類を含むことを特徴とする請求項1から請求項6のいずれか一項に記載の固体酸化物型燃料電池。
the anode catalyst is Ni and GDC;
7. The solid oxide fuel cell according to claim 1, wherein the cathode catalyst contains at least one of PrOx , LSM, LSC, and GDC.
前記アノード触媒および前記カソード触媒のそれぞれの平均粒径は、100nm以下であることを特徴とする請求項1から請求項7のいずれか一項に記載の固体酸化物型燃料電池。 The solid oxide fuel cell according to any one of claims 1 to 7, characterized in that the average particle size of each of the anode catalyst and the cathode catalyst is 100 nm or less. 前記第1支持体の厚み、前記第1混合層の厚み、および前記アノードの厚みの間には、前記第1支持体>前記第1混合層>前記アノードの関係が成立し、
前記第2支持体の厚み、前記第2混合層の厚み、および前記カソードの厚みの間には、前記第2支持体>前記第2混合層>前記カソードの関係が成立することを特徴とする請求項1から請求項8のいずれか一項に記載の固体酸化物型燃料電池。
a thickness of the first support, a thickness of the first mixed layer, and a thickness of the anode satisfy the following relationship: first support>first mixed layer>anode;
9. The solid oxide fuel cell according to claim 1, wherein a relationship is established among a thickness of the second support, a thickness of the second mixed layer, and a thickness of the cathode : second support > second mixed layer > cathode.
前記第1支持体および前記第2支持体の金属成分の結晶粒径は、前記第1混合層および前記第2混合層の金属成分の結晶粒径よりも大きいことを特徴とする請求項1から請求項9のいずれか一項に記載の固体酸化物型燃料電池。 10. A solid oxide fuel cell according to claim 1, wherein the crystal grain size of the metal component of the first support and the second support is larger than the crystal grain size of the metal component of the first mixed layer and the second mixed layer. 前記アノードおよび前記カソードの断面積において、前記多孔体の空隙率は、20%以上であることを特徴とする請求項1から請求項10のいずれか一項に記載の固体酸化物型燃料電池。 11. The solid oxide fuel cell according to claim 1, wherein the porosity of the porous body in the cross-sectional area of the anode and the cathode is 20% or more. 前記アノードおよび前記カソードの厚みは、2μm以上であることを特徴とする請求項1から請求項11のいずれか一項に記載の固体酸化物型燃料電池。 12. The solid oxide fuel cell according to claim 1 , wherein the anode and the cathode have a thickness of 2 μm or more. 前記アノードおよび前記カソードの前記多孔体において、イオン伝導性セラミックスと電子伝導性セラミックスとの断面積比は、1:9~9:1であることを特徴とする請求項1から請求項12のいずれか一項に記載の固体酸化物型燃料電池。 13. The solid oxide fuel cell according to claim 1, wherein in the porous bodies of the anode and the cathode, the cross-sectional area ratio of the ion conductive ceramics to the electron conductive ceramics is 1:9 to 9:1. 酸化物イオン伝導性を有する固体酸化物材料粉末を含む電解質グリーンシートの両面に、電子伝導性セラミックス材料粉末および酸化物イオン伝導性セラミックス材料粉末を含む電極グリーンシートと、セラミックス材料粉末および金属材料粉末を含む混合層グリーンシートと、金属粉末を含む支持体グリーンシートとが積層された積層体を焼成する工程と、
前記電極グリーンシートの焼成によって得られる多孔体に、触媒を含浸する工程と、を含むことを特徴とする固体酸化物型燃料電池の製造方法。
a step of firing a laminate in which an electrode green sheet containing an electron conductive ceramic material powder and an oxide ion conductive ceramic material powder, a mixed layer green sheet containing a ceramic material powder and a metal material powder, and a support green sheet containing a metal powder are laminated on both sides of an electrolyte green sheet containing a solid oxide material powder having oxide ion conductivity;
and impregnating a catalyst into the porous body obtained by firing the electrode green sheet.
前記触媒を含浸する工程の前に、前記支持体グリーシートの焼成によって得られる支持体、前記混合層グリーンシートの焼成によって得られる混合層、および前記多孔体の外周を絶縁部材によって覆う工程を含むことを特徴とする請求項14に記載の固体酸化物型燃料電池の製造方法。 15. The method for producing a solid oxide fuel cell according to claim 14, further comprising the step of covering the support obtained by firing the support green sheet, the mixed layer obtained by firing the mixed layer green sheet, and the outer periphery of the porous body with an insulating member prior to the step of impregnating the catalyst.
JP2021046530A 2021-03-19 2021-03-19 Solid oxide type fuel cell and manufacturing method thereof Pending JP2022145221A (en)

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