JP2008533678A - 混合アニオン/プロトン伝導を有する高温型燃料電池 - Google Patents
混合アニオン/プロトン伝導を有する高温型燃料電池 Download PDFInfo
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Abstract
Description
電極での水の出現がない(定常状態では、水が中和して、古いシステムの活性点は、電極への動的ガスフラックスを必要とする)。というのは、水が生成され、2H++O2−→H2Oの反応が行われる中央の複合多孔質膜で排出されるからである。
2H2O+2e=H2+2OH− Velec[25°]=−0.8277V
O2+4H++4e=2H2O Velec[25°]=+1.229V
25℃での完成セルの両端間の全体的電気化学ポテンシャルは、SOFC単独の1.23Vではなく、2Vを超える約(1.229+0.8277)Vである。この計算は、図4に正確に詳述されている。
本発明は、以下の説明を読みかつ添付図を検討したときに、より良く理解されるであろう。これらの図は、説明および例として与えられているにすぎず、本発明を限定するものとして受け取られるべきではない。
さらに、酸素のO2−イオンへの変換を確実にする電極2は、これらのO2−イオンの輸送を確実にする電解質4に接続される。電極2は、O2−イオンと酸素によって捕捉された電子との混合伝導を確実にする。その趣旨で、電極2は、酸化媒体の混合伝導体、例えばLSM(LaSrMn)で製作される。
CH4→C+2H2 (1)
H2O+CO→CO2+H2 (2)
2CO←→CO2+C (3)
C+H2O→CO+H2 (4)
各界面では、平衡がとれた状態の種の電気化学ポテンシャルは等しい。プロトン膜の電極11(インデックスのコンパートメント1)と層23(インデックスのコンパートメント2)の界面の場合、次の式が得られる。
Claims (11)
- 第1の電解質(13)に接触するアノード(11)と第2の電解質(4)に接触するカソード(2)とを含む燃料電池(17)であって、前記第1の電解質(13)と前記第2の電解質(4)の間に接合層(23)が配置され、
前記アノード11が、水素をH+イオンに変換することができ、前記H+イオンが、前記第1の電解質(13)を経由して前記接合層(23)まで移動され、
前記カソード(2)が、酸素をO2−に変換することができ、前記O2−イオンが、前記第2の電解質(4)を経由して前記接合層(23)まで移動され、
前記O2−イオンおよび前記H+イオンが、前記接合層(23)内で水に変換し、
前記アノードと前記カソードの間に電子流が形成することを特徴とする燃料電池(17)。 - 前記接合層(23)が、多孔質材料をベースとし、
BaCeO3、BaZrO3、SrCeO3などのプロトン酸化物相と、
YSZやセリン/ガドリニウム複合体などのイオン酸化物相と、
水を排出するための多孔質相とを含み、
前記3つの相が、前記接合層内に浸透するように設計され、前記プロトン酸化物相が、前記接合層(23)内での前記H+イオンの置換を可能にし、前記イオン酸化物相が、前記接合層(23)内での前記O2−イオンの置換を可能にし、前記多孔質相が、前記接合層(23)内での水の置換を可能にすることを特徴とする、請求項1に記載の燃料電池。 - 前記接合層(23)が、少なくとも30%のプロトン酸化物と、少なくとも30%のイオン酸化物と、少なくとも30%の多孔質材料とを含むことを特徴とする、請求項2に記載の燃料電池。
- 前記アノード(11)に接触する改質膜(24)をさらに含み、前記膜(24)が、炭化水素を水素に変換し、前記膜(24)が、ニッケル(27)で製作されかつナノダイヤモンド(37)を含み、前記ナノダイヤモンド(37)が、前記炭化水素の水素への変換中に現れる炭素粒子(28)を捕捉することを可能にし、前記炭素粒子(28)が、前記ニッケル粒子(27)の近くにフィラメント状に捕捉されることを特徴とする、請求項1から3に記載の燃料電池。
- 前記ナノダイヤモンド(37)が、5〜30nmのサイズを有することを特徴とする、請求項4に記載の燃料電池。
- 前記アノード(11)が、プロトンH+と電子の混合伝導体になるようにヘテロバレントカチオンでドープされ、前記アノードが、BaCeO3、SrCeO3またはBaZrO3あるいはサーメットで製作されることを特徴とする、請求項1から5の一項に記載の燃料電池。
- 前記第1の電解質(13)が、非ドープのSrCeO3、BaZrO3またはBaCeO3をベースとする非電子伝導性濃密プロトンセラミック製であることを特徴とする、請求項1から6の一項に記載の燃料電池。
- 前記カソード(2)が、LSM系酸化媒体の混合伝導体であり、前記カソードが、酸素イオンO2−と電子の伝導体であることを特徴とする、請求項1から7のいずれか一項に記載の燃料電池。
- 前記第2の電解質(4)が、イットリア安定化ジルコニア(ZrO2/Y2O3)をベースとするかまたはCe2O3で製作され、前記O2−イオンの伝導体であるが非電子伝導体であることを特徴とする、請求項1から8の一項に記載の燃料電池。
- アニオンセル(1)とプロトンセル(10)の組合せ体を備え、前記アニオンセル(1)および前記プロトンセル(10)がそれぞれ、前記アノード(3)および前記カソード(12)から除去され、前記セル(1、10)の電解質(4、13)が、接合層(23)によって結合され、それによって前記アニオンセル(1)によって生成された前記O2−イオンと、前記アニオンセル(10)によって生成されたH+イオンとが再結合して水を形成することが可能になることを特徴とする、請求項1から9の一項に記載の燃料電池(17)。
- 第1の電解質(13)に接触する第1の電極(11)と第2の電解質(4)に接触する第2の電極(2)とを含む燃料電池(17)であって、前記第1の電解質(13)と前記第2の電解質(4)の間に接合層(23)が配置され、
前記電極(11、2)、前記電解質(13、4)および前記接合層(23)が、前記第1の電極(2)から前記第2の電極(11)まで電流が流されたときに、前記セル(17)が、水を酸素および水素に解離するようなものであり、
前記接合層(23)が、水を送るとともに、前記水をプロトンH+およびアニオンO2−に解離する触媒特性を有することができ、
前記第1の電解質(13)が、前記接合層(23)内に形成された前記プロトンH+を前記接合層(23)から前記第1の電極(11)まで移動させることができ、
前記第1の電極(11)が、前記第1の電解質(13)によって移動された前記プロトンH+を水素に変換することができ、
前記第2の電解質(4)が、前記接合層(23)内に形成された前記O2−プロトンを前記接合層(23)から前記第2の電極(2)まで移動させることができ、
前記第2の電極(2)が、前記第2の電解質(4)によって移動された前記O2−プロトンを酸素に変換することができることを特徴とする、電解槽として機能する燃料電池(17)。
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FR0550696A FR2883420B1 (fr) | 2005-03-17 | 2005-03-17 | Cellule de pile a combustible haute temperature a conduction mixte anionique et protonique |
PCT/FR2006/050235 WO2006097663A2 (fr) | 2005-03-17 | 2006-03-17 | Cellule de pile à combustible haute température à conduction mixte anionique et protonique |
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Cited By (6)
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JP2009125620A (ja) * | 2007-11-20 | 2009-06-11 | Toyota Industries Corp | 電気化学デバイスおよび排気ガスの浄化装置 |
JP2014522356A (ja) * | 2011-03-26 | 2014-09-04 | 本田技研工業株式会社 | カーボンナノチューブと運送燃料用炭化水素を製造する電極触媒装置および方法に用いる原材料および設計方法 |
KR101669469B1 (ko) * | 2015-07-24 | 2016-10-26 | 창원대학교 산학협력단 | 연료전지용 하이브리드형 단위전지 및 이를 포함하는 연료전지 스택 |
JP2017511961A (ja) * | 2014-02-25 | 2017-04-27 | フォルシュングスツェントルム・ユーリッヒ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | 電気化学的エネルギー貯蔵装置並びにそれの作動方法 |
WO2020241211A1 (ja) * | 2019-05-27 | 2020-12-03 | パナソニックIpマネジメント株式会社 | 電気化学セル及び水素生成方法 |
WO2020241210A1 (ja) * | 2019-05-27 | 2020-12-03 | パナソニックIpマネジメント株式会社 | 電気化学セル |
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US20110151349A1 (en) * | 2008-06-10 | 2011-06-23 | Technion Research & Development Foundation Ltd. | Double-electrolyte fuel-cell |
FR2934717B1 (fr) * | 2008-07-29 | 2010-09-24 | Ass Pour La Rech Et Le Dev De | Anode a reformage par craquage, de pile a combustible pcfc |
US20100028736A1 (en) * | 2008-08-01 | 2010-02-04 | Georgia Tech Research Corporation | Hybrid Ionomer Electrochemical Devices |
KR20110101976A (ko) * | 2010-03-10 | 2011-09-16 | 삼성전자주식회사 | 고체산화물 연료전지 및 이의 제조방법 |
FR2969395B1 (fr) * | 2010-12-17 | 2013-01-11 | Ass Pour La Rech Et Le Dev De Methodes Et Processus Ind Armines | Pile a combustible avec ensemble electrolytes-membrane monolithique |
KR101289203B1 (ko) | 2011-08-11 | 2013-07-29 | 주식회사 포스코 | 연료 이용율이 우수한 연료전지 스택 |
FR2982426B1 (fr) * | 2011-11-03 | 2013-12-27 | Ass Pour La Rech Et Le Dev De Methodes Et Processus Ind Armines | Pile a combustible avec cathode avec canaux |
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JP2009125620A (ja) * | 2007-11-20 | 2009-06-11 | Toyota Industries Corp | 電気化学デバイスおよび排気ガスの浄化装置 |
JP2014522356A (ja) * | 2011-03-26 | 2014-09-04 | 本田技研工業株式会社 | カーボンナノチューブと運送燃料用炭化水素を製造する電極触媒装置および方法に用いる原材料および設計方法 |
JP2017197763A (ja) * | 2011-03-26 | 2017-11-02 | 本田技研工業株式会社 | カーボンナノチューブと運送燃料用炭化水素を製造する電極触媒装置および方法に用いる原材料および設計方法 |
JP2017511961A (ja) * | 2014-02-25 | 2017-04-27 | フォルシュングスツェントルム・ユーリッヒ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | 電気化学的エネルギー貯蔵装置並びにそれの作動方法 |
KR101669469B1 (ko) * | 2015-07-24 | 2016-10-26 | 창원대학교 산학협력단 | 연료전지용 하이브리드형 단위전지 및 이를 포함하는 연료전지 스택 |
WO2020241211A1 (ja) * | 2019-05-27 | 2020-12-03 | パナソニックIpマネジメント株式会社 | 電気化学セル及び水素生成方法 |
WO2020241210A1 (ja) * | 2019-05-27 | 2020-12-03 | パナソニックIpマネジメント株式会社 | 電気化学セル |
Also Published As
Publication number | Publication date |
---|---|
US7927757B2 (en) | 2011-04-19 |
FR2883420A1 (fr) | 2006-09-22 |
WO2006097663A2 (fr) | 2006-09-21 |
US20080213639A1 (en) | 2008-09-04 |
EP1859502A2 (fr) | 2007-11-28 |
ATE556458T1 (de) | 2012-05-15 |
WO2006097663A3 (fr) | 2007-03-08 |
EP1859502B1 (fr) | 2012-05-02 |
FR2883420B1 (fr) | 2007-05-11 |
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