JP5323269B2 - 燃料電池の構成物、特に固形酸化物型燃料電池の電解質材料 - Google Patents
燃料電池の構成物、特に固形酸化物型燃料電池の電解質材料 Download PDFInfo
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Description
本願は2010年1月26日出願の米国仮出願61/298,468号の利益を主張し、この仮特許出願における全開示内容が本願明細書に組み込まれる。
(ZrO2)1−w−x−z(Sc2O3)w(CeO2)x(Y2O3)a(Yb2O3)b
ここで、0.09≦w≦0.11、0<x≦0.025、a+b=z、0≦z≦0.025、且つ、x+z≧0.02。
本発明の別の実施形態は、固体酸化物型燃料電池のためのスカンジア安定化ジルコニア電解質組成物を提供し、それは次の化学式を構成する、
(ZrO2)1−w−x−z(Sc2O3)w(CeO2)x(Y2O3)a(Yb2O3)b
ここで、0.09≦w≦0.11、0≦x≦0.0125、a+b=z 且つ 0.0025≦z≦0.02、且つ、x+z≦0.02。
化学式(1)を構成し得る。
(ZrO2)1−w−x−z(Sc2O3)w(CeO2)x(Y2O3)a(Yb2O3)b (1)
ここで、wはおよそ0.09から0.11、xは0より大きく0.025まで、aとbの合計はzと等しく、且つ、zは0から0.025まで、且つ、xにzを加えた合計は0.02以上。つまり、0.09≦w≦0.11、0<x≦0.025、a+b=z 且つ 0≦z≦0.025、且つ、x+z≧0.02。望ましくは、xの範囲は0.005から0.025まで、zの範囲は0.005から0.025まで、且つ、xとzの合計は0.02以上且つ0.03以下である。つまり、0.005≦x≦0.025、0.005≦z≦0.025、且つ、0.02≦(x+z)≦0.03。更に望ましくは、w=0.1、x=0.01、そしてz=0.01。それ故に、wはおよそ10モル%で、xはおよそ1モル%で、そしてzはおよそ1モル%であり得る。化学式(1)において、bはaより小さくなることができ(即ち、b<a)、aはbより小さくなることができ(即ち、a<b)、aは0と等しくなることができ(即ち、a=0)、bは0と等しくなることができ(即ち、b=0)、或いはaはbと等しくなることができる(即ち、a=b)。
(ZrO2)1−w−x−z(Sc2O3)w(CeO2)x(Y2O3)a(Yb2O3)b (2)
ここで、wはおよそ0.09から0.11、xは0から0.0125、aは0から0.0125、bは0から0.02、aとbの合計はzに等しく、且つ、zは0.0025から0.02、且つ、xにzを加えた合計は0.02以下。つまり、0.09≦w≦0.11、0≦x≦0.0125、a+b=z 且つ 0.0025≦z≦0.02、且つ、x+z≦0.02。望ましくは、第3実施形態の第1の特徴において、xは0.0025から0.0125まで、例えば0.005から0.01まで、変動し、zは0.0025から0.0125まで、例えば0.005から0.01まで、変動し、そして、x及びzの合計は0.005以上、0.0175以下、例えば0.01以上0.015以下、である。つまり、0.0025≦x≦0.0125で、例えば0.005≦x≦0.01、0.0025≦z≦0.0125で、例えば0.005≦z≦0.01、且つ、0.005≦(x+z)≦0.0175、例えば0.01≦(x+z)≦0.015。更に望ましくは、w=0.1、x=0.01(z=0.005のとき)、及びx=0.005(z=0.01のとき)。それ故に、wはおよそ10モル%になることができ、xはおよそ0.5から1モル%になることができ、及び、zはおよそ0.5から1モル%になることができる。望ましくは、第3実施形態の第2の特徴において、xは0から0.0125まで、例えば0.005から0.01まで、変動し、0≦a≦0.001(望ましくはa=0)、そしてb及びzは0.0025から0.02まで、例えば0.005から0.01まで、変動し、そしてx及びzの合計は0.005以上且つ0.02以下、例えば0.01から0.015まで、である。化学式(2)において、bはaより小さくなることでき(即ち、b<a)、aはbより小さくなることでき(即ち、a<b)、aは0と等しくなることでき(即ち、a=0)、bは0と等しくなり得ることでき(即ち、b=0)、或いは、aはbと等しくなり得る(即ち、a=b)。望ましくはa又はbの1つのみが0と等しい。第3実施形態による例示的な組成物は以下のものを含む:
10Sc1Ce1Y(10モル%Sc2O3+1モル%CeO2+1モル%Y2O3),残余ジルコニア(remainder zirconia);
10Sc1Ce0.5Y(10モル%Sc2O3+1モル%CeO2+0.5モル%Y2O3),残余ジルコニア;
10Sc1Ce1Yb(10モル%Sc2O3+1モル%CeO2+1モル%Yb2O3),残余ジルコニア;
10Sc1Ce0.5Yb(10モル%Sc2O3+1モル%CeO2+0.5モル%Yb2O3),残余ジルコニア;
10Sc0.5Ce0.5Y(10モル%Sc2O3+0.5モル%CeO2+0.5モル%Y2O3),残余ジルコニア;
10Sc0.5Ce0.5Yb(10モル%Sc2O3+0.5モル%CeO2+0.5モル%Yb2O3),残余ジルコニア;
10Sc0.5Ce1Y(10モル%Sc2O3+0.5モル%CeO2+1モル%Y2O3),残余ジルコニア;
10Sc0.5Ce1Yb(10モル%Sc2O3+0.5モル%CeO2+1モル%Yb2O3),残余ジルコニア;及び
10Sc1Yb(10モル%Sc2O3+1モル%Yb2O3),残余ジルコニア。
Claims (12)
- 固形酸化物型燃料電池のスカンジア安定化ジルコニア電解質組成物であって、
(ZrO2)1−w−x−z(Sc2O3)w(CeO2)x(Y2O3)a(Yb2O3)b
ここで、0.09≦w≦0.11、0<x≦0.025、a+b=z、0<z≦0.025、且つ、x+z≧0.02、
の化学式を構成する組成物。 - 請求項1に記載の電解質組成物において、0.005≦x≦0.025、0.005≦z≦0.025、且つ、0.02≦(x+z)≦0.03である組成物。
- 請求項2に記載の電解質組成物において、
w=0.1、x=0.01、且つ、z=0.01であり、且つ、
前記組成物は10モル%Sc2O3、1モル%CeO2及び1モル%Y2O3を含有するジルコニアを含む組成物。 - 請求項1に記載の電解質組成物において、
前記組成物は850℃の温度にて4000時間後にイオン伝導率の15%を超える劣化を経験せず、
前記組成物は850℃にて少なくとも4000時間の空気又は水素の環境の少なくとも一方での固形酸化物型燃料電池における運転の後、正方晶相の領域を実質的に欠いた立方晶相を含み、且つ、
前記組成物は25から850℃の温度にて立方晶から菱面体晶相への相変化がない組成物。 - 請求項1に記載の組成物において、前記組成物はアノード及びカソードを含む平板型固形酸化物型燃料電池の電解質層に使用され、且つ、前記電解質層は前記アノード及びカソードを支持する組成物。
- 固形酸化物型燃料電池のスカンジア安定化ジルコニア電解質組成物であって、
(ZrO2)1−w−x−z(Sc2O3)w(CeO2)x(Y2O3)a(Yb2O3)b
ここで、0.09≦w≦0.11、0<x≦0.0125、a+b=z 且つ 0.0025≦z≦0.02、且つ、x+z≦0.02、
の化学式を構成する組成物。 - 請求項6に記載の電解質組成物において、0.0025≦x≦0.0125、0.0025≦z≦0.0125、且つ、0.005≦(x+z)≦0.0175である組成物。
- 請求項7に記載の電解質組成物において、0.005≦x≦0.01、0.005≦z≦0.01、0.01≦(x+z)≦0.015である組成物。
- 請求項6に記載の電解質組成物において、前記組成物は
10モル%Sc2O3、1モル%CeO2、1モル%Y2O3、残余ジルコニア、
10モル%Sc2O3、1モル%CeO2、0.5モル%Y2O3、残余ジルコニア、
10モル%Sc2O3、1モル%CeO2、1モル%Yb2O3、残余ジルコニア、
10モル%Sc2O3、1モル%CeO2、0.5モル%Yb2O3、残余ジルコニア、
10モル%Sc2O3、0.5モル%CeO2、0.5モル%Y2O3、残余ジルコニア、
10モル%Sc2O3、0.5モル%CeO2、0.5モル%Yb2O3、残余ジルコニア、及び、
10モル%Sc2O3、0.5モル%CeO2、1モル%Y2O3、残余ジルコニア、
の少なくとも1つを含む組成物。 - 請求項6に記載の電解質組成物において、
前記組成物は850℃の温度にて4000時間後にイオン伝導率の15%より多い劣化を経験せず、
前記組成物は850℃にて少なくとも4000時間の空気又は水素の環境の少なくとも一方での固形酸化物型燃料電池における運転の後、正方晶相の領域を実質的に欠いた立方晶相を含み、且つ、
前記組成物は25から850℃の温度にて立方晶から菱面体晶相への相変化がない組成物。 - 請求項6に記載の組成物において、
前記組成物はアノード及びカソードを含む平板型固形酸化物型燃料電池の電解質層に使用され、
前記電解質層は前記アノード及びカソードを支持し
前記固形酸化物型燃料電池は少なくとも94wt%Cr、4〜6wt%Fe及び0〜1wt%Yを含むインターコネクトに隣接する固形酸化物型燃料電池スタックに位置し、且つ、
前記電解質の熱膨張係数が前記インターコネクトの熱膨張係数と1%又はそれより少ない程度に異なる組成物。 - 固形酸化物型燃料電池であって、
固形酸化物電解質と、
アノード電極と、及び、
カソード電極と、を含み、
前記アノード及び前記カソードの電極の少なくとも1つが
(i)スカンジア、
(ii)セリア、及び
(iii)0より多く且つ2.5モル%以下の量で存在するイットリア及びイッテルビアの少なくとも1つ、
により安定化されたジルコニアを含む電気伝導相及びイオン伝導相を含む組成電極を含み、
前記安定化ジルコニア電極組成物は、
化学式(1)
(ZrO2)1−w−x−z(Sc2O3)w(CeO2)x(Y2O3)a(Yb2O3)b
ここで、0.09≦w≦0.11、0<x≦0.025、a+b=z、0<z≦0.025、且つ、x+z≧0.02、
又は化学式(2)
(ZrO2)1−w−x−z(Sc2O3)w(CeO2)x(Y2O3)a(Yb2O3)b
ここで0.09≦w≦0.11、0<x≦0.0125、a+b=z 且つ 0.0025≦z≦0.02、且つ、x+z≦0.02
の何れかを構成する燃料電池。
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CN102725902A (zh) | 2012-10-10 |
EP2529442B1 (en) | 2018-10-03 |
EP3432401B1 (en) | 2020-08-12 |
AU2011209829C1 (en) | 2016-09-01 |
JP2013518389A (ja) | 2013-05-20 |
TWI501937B (zh) | 2015-10-01 |
US9413024B2 (en) | 2016-08-09 |
US20140051010A1 (en) | 2014-02-20 |
CN102725902B (zh) | 2016-01-20 |
EP2529442A4 (en) | 2015-05-27 |
AU2011209829A1 (en) | 2012-07-19 |
US9799909B2 (en) | 2017-10-24 |
US8580456B2 (en) | 2013-11-12 |
WO2011094098A2 (en) | 2011-08-04 |
WO2011094098A3 (en) | 2011-11-17 |
EP3432401A1 (en) | 2019-01-23 |
US20110183233A1 (en) | 2011-07-28 |
TW201136863A (en) | 2011-11-01 |
US20160322663A1 (en) | 2016-11-03 |
EP2529442A2 (en) | 2012-12-05 |
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