JP5255173B2 - 固体酸化物燃料電池用粗雑化電解質界面層 - Google Patents
固体酸化物燃料電池用粗雑化電解質界面層 Download PDFInfo
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- JP5255173B2 JP5255173B2 JP2001585341A JP2001585341A JP5255173B2 JP 5255173 B2 JP5255173 B2 JP 5255173B2 JP 2001585341 A JP2001585341 A JP 2001585341A JP 2001585341 A JP2001585341 A JP 2001585341A JP 5255173 B2 JP5255173 B2 JP 5255173B2
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Description
本発明は粗雑化界面ナノ結晶層で被覆された電解質及び固体酸化物燃料電池での前記電解質の使用に関する。
本発明は、少なくとも1つの表面の上が粗雑化界面ナノ結晶層で被覆された電解質構造体に関する。
本発明は、少なくとも1つの表面が粗雑化界面ナノ結晶層で被覆された電解質構造体に関する。本明細書で用いられるナノ結晶層は、粒度が1μmより小さく、好ましくは0.5μmより小さい、微結晶でつくられた結晶層からなる。一実施形態において、電解質構造体は多結晶セラミックである。好ましい多結晶セラミックには、安定化ジルコニア、部分安定化ジルコニア、安定化ハフニア、部分安定化ハフニア、ジルコニアとハフニアの混合物、ジルコニアを含むセリア、ジルコニアを含むビスマス、ガドリニウム、及びゲルマニウムがある。最も好ましい多結晶セラミックは、安定化ジルコニア及び部分安定化ジルコニアである。これらには、Y,Ce,Ca,Mg,Sc,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu,In,Ti,Sn,Nb,Ta,Mo及びWの酸化物並びにこれらの混合物からなる群から選ばれるドーパントがドープされた、部分安定化ジルコニアまたは安定化ジルコニアが含まれる。
実施例1−セラミックスリップの作成
100グラムのジルコニア粉末を含有するセラミックスリップを、下の表1に示す成分を用いて作成する。
希釈溶液作成のため、実施例1のセラミックスリップと同様のレシピを用いるが、セラミック粉末及び分散剤は加えていない(下の表3を参照されたい)。したがって、沈降工程は必要ない。
125mlナルゲン(登録商標)容器を用いて、5.63グラムのセラミックスリップをピペットで容器に入れ、次いで9.55グラムの希釈溶液を加える。容器を手で約30秒間揺する。
小型の実験室規模テープ流延機(米国メリーランド州シルバースプリング(Silver Spring)のパシフィック・サイエンティフィック(Pacific Scientific)社ガードナー/ネオテック・インスツルメント(Gardner/Neotec Instrument)事業部でつくられたユニット)及びクリアランスが0.5ミル(約0.127mm)の流延ブレード(ブレードとシート表面の間隔が0.5ミル)を用いて、厚さが約20μmで大きさが4cm×8cmの柔軟な焼結ジルコニア−3モル%イットリア電解質からなる薄い電解質基板を、以下の手順で被覆する。
ジルコニア−3モル%イットリア界面層をもつジルコニア−3モル%イットリア電解質を実施例4にあるようにして作成する。面積が2.5cm×1cmの対称電極を、以下の手順にしたがって、界面層をもつ電解質の対向する両面のそれぞれの上に印刷する。
上の実施例5で述べたようにして作成した電極/電解質複合体を燃料電池性能を評価するために簡単な燃料電池集成体に組み込む。電池を構成する前に、電池の負極として機能するように選んだ電極を、水素解離に対する触媒活量を高めるために初めに処理する。この目的のため、硝酸ニッケルの0.5M溶液の形態のニッケル前駆体を、綿棒を用いて負極に硝酸溶液を繰り返し(10回)塗布することにより、負極に含浸させる。塗布と塗布の間に、試料を350℃のホットプレート上において乾燥させる。
4 電解質
6,7 電極
8 酸化体貯蔵槽
10 燃料貯蔵槽
12 壁体
Claims (8)
- 電解質構造体において、少なくとも1つの表面が粗雑化ナノ結晶層で被覆され、該粗雑化ナノ結晶層は、0.5μmより小さい粒度を有する微結晶を含み、該粗雑化ナノ結晶層の平均表面粗さは150nmより大きいことを特徴とする、電解質構造体。
- 前記電解質構造体が多結晶セラミックであることを特徴とする請求項1記載の電解質構造体。
- 前記電解質構造体の厚さが5μmから45μmまでであることを特徴とする請求項1記載の電解質構造体。
- 前記層が前記電解質構造体と同じ組成であることを特徴とする請求項1記載の電解質構造体。
- 前記層が前記多結晶セラミックに混合された電子伝導相をさらに含むことを特徴とする請求項2記載の電解質構造体。
- 前記電子伝導相が金属、金属合金またはサーメットであることを特徴とする請求項5記載の電解質構造体。
- 固体酸化物燃料電池において:
正空気電極;
負燃料電極;
前記正空気電極と前記負燃料電極との間に挟み込まれた電解質構造体;及び
前記電解質構造体と前記正空気電極及び前記負燃料電極の内の少なくとも1つとの間に挟み込まれた粗雑化ナノ結晶層;
を備え、前記粗雑化ナノ結晶層は、0.5μmより小さい粒度を有する微結晶を含み、該粗雑化ナノ結晶層の電極側界面の平均表面粗さは150nmより大きいことを特徴とする、燃料電池。
- 前記正空気電極が銀−パラジウム−ジルコニア電極であり、前記負燃料電極が銀−パラジウム−ジルコニア電極であることを特徴とする請求項7記載の燃料電池。
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US09/573,326 | 2000-05-18 | ||
US09/573,326 US6428920B1 (en) | 2000-05-18 | 2000-05-18 | Roughened electrolyte interface layer for solid oxide fuel cells |
PCT/US2001/009742 WO2001089018A1 (en) | 2000-05-18 | 2001-03-26 | Roughened electrolyte interface layer for solid oxide fuel cells |
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US (1) | US6428920B1 (ja) |
EP (1) | EP1287577A4 (ja) |
JP (1) | JP5255173B2 (ja) |
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US6605316B1 (en) | 1999-07-31 | 2003-08-12 | The Regents Of The University Of California | Structures and fabrication techniques for solid state electrochemical devices |
JP4605885B2 (ja) * | 2000-10-23 | 2011-01-05 | 東邦瓦斯株式会社 | 支持膜式固体電解質型燃料電池 |
JP4771579B2 (ja) * | 2000-10-23 | 2011-09-14 | 東邦瓦斯株式会社 | 固体電解質型燃料電池 |
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FR2820054B1 (fr) * | 2001-01-26 | 2003-11-07 | Air Liquide | Structures-microstructures de membrane ceramique conducteurs par ions oxyde ; utilisation pour separer l'oxygene de l'air |
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US7144648B2 (en) * | 2002-11-22 | 2006-12-05 | The Research Foundation Of State University Of New York | Bipolar plate |
CA2512011A1 (en) * | 2003-01-10 | 2004-07-29 | Qinetiq Nanomaterials Limited | Improvements in and relating to deposited structures |
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EP1671385B1 (en) * | 2003-09-10 | 2013-01-02 | BTU International, Inc. | Process for solid oxide fuel cell manufacture |
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2000
- 2000-05-18 US US09/573,326 patent/US6428920B1/en not_active Expired - Lifetime
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- 2001-03-26 JP JP2001585341A patent/JP5255173B2/ja not_active Expired - Fee Related
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EP1287577A4 (en) | 2007-05-02 |
EP1287577A1 (en) | 2003-03-05 |
US6428920B1 (en) | 2002-08-06 |
TW575977B (en) | 2004-02-11 |
JP2004507862A (ja) | 2004-03-11 |
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