JP4955831B1 - 固体酸化物形燃料電池の発電部間を電気的に接続する接合体 - Google Patents
固体酸化物形燃料電池の発電部間を電気的に接続する接合体 Download PDFInfo
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- JP4955831B1 JP4955831B1 JP2011202758A JP2011202758A JP4955831B1 JP 4955831 B1 JP4955831 B1 JP 4955831B1 JP 2011202758 A JP2011202758 A JP 2011202758A JP 2011202758 A JP2011202758 A JP 2011202758A JP 4955831 B1 JP4955831 B1 JP 4955831B1
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- 239000002184 metal Substances 0.000 claims abstract description 13
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- NFYLSJDPENHSBT-UHFFFAOYSA-N chromium(3+);lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Cr+3].[La+3] NFYLSJDPENHSBT-UHFFFAOYSA-N 0.000 claims description 13
- 239000003792 electrolyte Substances 0.000 claims description 6
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- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 229910052733 gallium Inorganic materials 0.000 claims description 2
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- 150000002602 lanthanoids Chemical class 0.000 claims description 2
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- 229910052723 transition metal Inorganic materials 0.000 claims description 2
- 150000003624 transition metals Chemical class 0.000 claims description 2
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- 230000005611 electricity Effects 0.000 claims 1
- 238000005304 joining Methods 0.000 abstract description 13
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- 238000000034 method Methods 0.000 description 8
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- PACGUUNWTMTWCF-UHFFFAOYSA-N [Sr].[La] Chemical compound [Sr].[La] PACGUUNWTMTWCF-UHFFFAOYSA-N 0.000 description 6
- -1 oxygen ion Chemical class 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
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- 229920005989 resin Polymers 0.000 description 5
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 description 5
- 229910003026 (La,Sr)(Co,Fe)O3 Inorganic materials 0.000 description 4
- 229910018921 CoO 3 Inorganic materials 0.000 description 4
- QBYHSJRFOXINMH-UHFFFAOYSA-N [Co].[Sr].[La] Chemical compound [Co].[Sr].[La] QBYHSJRFOXINMH-UHFFFAOYSA-N 0.000 description 4
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- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 description 4
- 229910052688 Gadolinium Inorganic materials 0.000 description 3
- 229910017563 LaCrO Inorganic materials 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910021526 gadolinium-doped ceria Inorganic materials 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- 229910052684 Cerium Inorganic materials 0.000 description 2
- 229910001252 Pd alloy Inorganic materials 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- LNTHITQWFMADLM-UHFFFAOYSA-N gallic acid Chemical compound OC(=O)C1=CC(O)=C(O)C(O)=C1 LNTHITQWFMADLM-UHFFFAOYSA-N 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- DOARWPHSJVUWFT-UHFFFAOYSA-N lanthanum nickel Chemical compound [Ni].[La] DOARWPHSJVUWFT-UHFFFAOYSA-N 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
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- 229910002119 nickel–yttria stabilized zirconia Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- SWELZOZIOHGSPA-UHFFFAOYSA-N palladium silver Chemical compound [Pd].[Ag] SWELZOZIOHGSPA-UHFFFAOYSA-N 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910020068 MgAl Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
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Abstract
【解決手段】隣接する2つの横縞型SOFCセル100、100間が、金属製の接続部材300によって接合される。「接続部材300の左側端部」と、「左側のSOFCセル100に設けられた空気極60と電気的に接続されたインターコネクタ30」とが、接合材80を用いて電気的に接続するように接合され、且つ、「接続部材300の右側端部」と、「右側のSOFCセル100に設けられた燃料極20と電気的に接続されたインターコネクタ30」とが、接合材80を用いて電気的に接続するように接合されている。接合材80によって金属製の接続部材300の両端部のそれぞれと接合されるインターコネクタ30、30が、共に緻密な導電性セラミックス材料からなる。
【選択図】図15
Description
図3は、図1に示したSOFCセル100の全体を示す。このSOFCセルは、長手方向を有する平板状の支持基板10の上下面(互いに平行な両側の主面(平面))のそれぞれに、電気的に直列に接続された複数(本例では、4つ)の同形の発電素子部Aが長手方向において所定の間隔をおいて配置された、所謂「横縞型」と呼ばれる構成を有する。
(1/2)・O2+2e−→O2− (於:空気極60) …(1)
H2+O2−→H2O+2e− (於:燃料極20) …(2)
次に、図3に示した「横縞型」のSOFCセル100の製造方法の一例について図7〜図14を参照しながら簡単に説明する。図7〜図14において、各部材の符号の末尾の「g」は、その部材が「焼成前」であることを表す。
次に、図1に示した本発明の実施形態に係る「接合体」の詳細な構成について説明する。図1に示すように、固定部材によって整列配置された複数のSOFCセル100において、接合箇所A(図1を参照)では図15に示す接合体が形成され、接合箇所B(図1を参照)では図16に示す接合体が形成されている。図15、図16において、図3に示す部材と同じ或いは等価な部材については、図3と同じ符号が付されている。
Claims (5)
- 燃料側電極と、電解質膜と、空気側電極とからなる固体酸化物形燃料電池の第1の発電部と、
燃料側電極と、電解質膜と、空気側電極とからなる固体酸化物形燃料電池の第2の発電部と、
前記第1の発電部の前記燃料側電極と電気的に接続され、且つ電子伝導性を有する緻密な導電性セラミックスからなる第1導電部材と、
前記第2の発電部の前記空気側電極と電気的に接続され、且つ電子伝導性を有する緻密な導電性セラミックスからなる第2導電部材と、
を備え、
前記第1導電部材及び前記第2導電部材が電子伝導性を有する接合材を用いて接合されてなる、固体酸化物形燃料電池の発電部間を電気的に接続する接合体であって、
前記第1の発電部及び前記第1導電部材は、第1の固体酸化物形燃料電池セルの支持基板であって燃料ガスを流すための燃料ガス流路が内部に形成された多孔質の板状の支持基板に設けられ、
前記第2の発電部及び前記第2導電部材は、第2の固体酸化物形燃料電池セルの支持基板であって燃料ガスを流すための燃料ガス流路が内部に形成された多孔質の板状の支持基板に設けられ、
前記第1、第2固体酸化物形燃料電池セル間が前記接合材によって電気的に接続され、
前記第1導電部材は、前記第1の発電部の前記燃料側電極に接合され、
前記第2導電部材は、前記第2の発電部が設けられた前記支持基板に接合された導電性セラミックスであって前記第2の発電部の前記空気側電極と電気的に接続され且つ前記燃料側電極と同じ材質からなる導電性セラミックスに接合され、
前記空気側電極が前記燃料側電極より低い温度で焼成されてなり、前記燃料側電極と同じ材質からなる導電性セラミックスが前記空気側電極より高い温度で焼成されてなる、接合体。 - 燃料側電極と、電解質膜と、空気側電極とからなる固体酸化物形燃料電池の第1の発電部と、
燃料側電極と、電解質膜と、空気側電極とからなる固体酸化物形燃料電池の第2の発電部と、
前記第1の発電部の前記燃料側電極と電気的に接続され、且つ電子伝導性を有する緻密な導電性セラミックスからなる第1導電部材と、
前記第2の発電部の前記空気側電極と電気的に接続され、且つ電子伝導性を有する緻密な導電性セラミックスからなる第2導電部材と、
前記第1導電部材と前記第2導電部材とを電気的に接続するための金属からなる接続部材と、
を備え、
前記接続部材及び前記第1導電部材、並びに、前記接続部材及び前記第2導電部材が電子伝導性を有する接合材を用いてそれぞれ接合されてなる、固体酸化物形燃料電池の発電部間を電気的に接続する接合体であって、
前記第1の発電部及び前記第1導電部材は、第1の固体酸化物形燃料電池セルの支持基板であって燃料ガスを流すための燃料ガス流路が内部に形成された多孔質の板状の支持基板に設けられ、
前記第2の発電部及び前記第2導電部材は、第2の固体酸化物形燃料電池セルの支持基板であって燃料ガスを流すための燃料ガス流路が内部に形成された多孔質の板状の支持基板に設けられ、
前記第1、第2固体酸化物形燃料電池セル間が前記接続部材によって電気的に接続され、
前記第1導電部材は、前記第1の発電部の前記燃料側電極に接合され、
前記第2導電部材は、前記第2の発電部が設けられた前記支持基板に接合された導電性セラミックスであって前記第2の発電部の前記空気側電極と電気的に接続され且つ前記燃料側電極と同じ材質からなる導電性セラミックスに接合され、
前記空気側電極が前記燃料側電極より低い温度で焼成されてなり、前記燃料側電極と同じ材質からなる導電性セラミックスが前記空気側電極より高い温度で焼成されてなる、接合体。 - 請求項1又は請求項2に記載の接合体において、
前記第1、第2導電部材を構成する導電性セラミックスの気孔率は15%以下である、接合体。 - 請求項3に記載の接合体において、
前記第1、第2導電部材を構成する導電性セラミックスは、
化学式La1−xAxCr1−y−zByO3(ただし、A:Ca,Sr,Baから選択される少なくとも1種類の元素、B:Co,Ni,Mg,Alから選択される少なくとも1種類の元素、0.05≦x≦0.2、0.02≦y≦0.22、0≦z≦0.05)で表わされるランタンクロマイトである、接合体。 - 請求項3に記載の接合体において、
前記第1、第2導電部材を構成する導電性セラミックスは、
化学式(A1−x,Bx)1−z(Ti1−y,Dy)O3(ただし、A:アルカリ土類元素から選択される少なくとも1種類の元素、B:Sc,Y,及びランタノイド元素から選択される少なくとも1種類の元素、D:第4周期、第5周期、第6周期の遷移金属、及びAl,Si,Zn,Ga,Ge,Sn,Sb,Pb,Biから選択される少なくとも1種類の元素、0≦x≦0.5、0≦y≦0.5、−0.05≦z≦0.05)で表わされるチタン酸化物である、接合体。
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