JP2014081998A - 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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- JP2014081998A JP2014081998A JP2011202758A JP2011202758A JP2014081998A JP 2014081998 A JP2014081998 A JP 2014081998A JP 2011202758 A JP2011202758 A JP 2011202758A JP 2011202758 A JP2011202758 A JP 2011202758A JP 2014081998 A JP2014081998 A JP 2014081998A
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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 (8)
- 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。 - 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。 - 請求項2に記載の接合体において、
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た、接合体。 - 請求項2に記載の接合体において、
前記第1の発電部及び前記第1導電部材は、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の第1の表面側に設けられ、
前記第2の発電部及び前記第2導電部材は、前記支持基板の前記第1の表面側と反対側の第2の表面側に設けられ、
前記固体酸化物形燃料電池セルの第1表面側と第2表面側との間が前記接続部材によって電気的に接続された、接合体。 - 請求項3又は請求項4に記載の接合体において、
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た、接合体。 - 請求項1乃至請求項5の何れか一項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6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6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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