JPH0757746A - Electrode structure of solid electrolytic fuel cell - Google Patents
Electrode structure of solid electrolytic fuel cellInfo
- Publication number
- JPH0757746A JPH0757746A JP5215132A JP21513293A JPH0757746A JP H0757746 A JPH0757746 A JP H0757746A JP 5215132 A JP5215132 A JP 5215132A JP 21513293 A JP21513293 A JP 21513293A JP H0757746 A JPH0757746 A JP H0757746A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- solid electrolyte
- layer
- fuel cell
- fuel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/90—Selection of catalytic material
- H01M4/9041—Metals or alloys
- H01M4/905—Metals or alloys specially used in fuel cell operating at high temperature, e.g. SOFC
- H01M4/9066—Metals or alloys specially used in fuel cell operating at high temperature, e.g. SOFC of metal-ceramic composites or mixtures, e.g. cermets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/8636—Inert electrodes with catalytic activity, e.g. for fuel cells with a gradient in another property than porosity
- H01M4/8642—Gradient in composition
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inert Electrodes (AREA)
- Fuel Cell (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、酸素イオン伝導度の
高い固体電解質を挟んで空気電極と燃料電極とを形成し
た固体電解質型燃料電池における電極の構造に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an electrode in a solid oxide fuel cell in which an air electrode and a fuel electrode are formed by sandwiching a solid electrolyte having high oxygen ion conductivity.
【０００２】[0002]
【従来の技術】この種の燃料電池は、図４に模式的に示
すように、薄膜状の固体電解質１を挟んだ両側に、多孔
質膜である燃料電極２と空気電極３とを形成したもので
あり、燃料電極２側を流れる燃料ガス（例えば水素ガ
ス）と空気電極３側を流れる空気中の酸素とが、固体電
解質１を介して電気化学的に反応することにより、各電
極２，３を介して起電力を得ることができる。2. Description of the Related Art In this type of fuel cell, as schematically shown in FIG. 4, a fuel electrode 2 and an air electrode 3 which are porous membranes are formed on both sides sandwiching a thin film solid electrolyte 1. The fuel gas (for example, hydrogen gas) flowing on the side of the fuel electrode 2 and oxygen in the air flowing on the side of the air electrode 3 react electrochemically via the solid electrolyte 1 so that each electrode 2, An electromotive force can be obtained via
【０００３】すなわち空気は空気電極３の内部を固体電
解質１の表面にまで拡散し、その空気に含まれる酸素が
イオン化して固体電解質１の内部を燃料電極２側に移動
する。また燃料電極２側では、水素ガスが燃料電極２の
内部を固体電解質１の表面にまで拡散し、ここで固体電
解質１を通って移動してきた酸素と反応する。このよう
な水素と酸素との電気化学的な反応により生じる起電力
が各電極２，３を介して外部に取り出される。That is, air diffuses inside the air electrode 3 to the surface of the solid electrolyte 1, and oxygen contained in the air is ionized and moves inside the solid electrolyte 1 to the fuel electrode 2 side. On the fuel electrode 2 side, hydrogen gas diffuses inside the fuel electrode 2 to the surface of the solid electrolyte 1, where it reacts with oxygen that has moved through the solid electrolyte 1. The electromotive force generated by such an electrochemical reaction between hydrogen and oxygen is extracted to the outside via the electrodes 2 and 3.
【０００４】上記の反応は、固体電解質１の活性度が優
れる１０００℃程度の高温度で行われるので、固体電解
質１としては、酸素イオン伝導度に優れることは勿論、
高温安定性に優れ、かつ導電性がないなどの特性が要求
される。そのため、従来、一般には、イットリアやカル
シアで安定化したジルコニア（ＹＳＺあるいはＣＳＺ）
が固体電解質として使用されている。Since the above reaction is carried out at a high temperature of about 1000 ° C. at which the activity of the solid electrolyte 1 is excellent, the solid electrolyte 1 is of course excellent in oxygen ion conductivity.
Properties such as excellent stability at high temperature and lack of conductivity are required. Therefore, conventionally, generally, zirconia stabilized by yttria or calcia (YSZ or CSZ)
Is used as a solid electrolyte.
【０００５】また燃料電極２は、起電力を外部に取り出
すための電極であるから、電子伝導度が高くかつ分極を
生じにくいことのほかに、高温の還元雰囲気に曝される
から、高温での安定性が要求され、また固体電解質１と
の間の熱応力やそれに起因する剥離を防止するために、
熱膨張率が固体電解質１の熱膨張率に近いことが望まれ
る。従来、これらの諸要求を満たすために、ＮｉＯ／Ｙ
ＳＺのサーメットを燃料電極として採用し、発電時の高
温還元雰囲気でＮｉＯをＮｉに変化させている。Further, since the fuel electrode 2 is an electrode for taking out an electromotive force to the outside, it has a high electron conductivity and hardly causes polarization, and is exposed to a high-temperature reducing atmosphere. Stability is required, and in order to prevent thermal stress from the solid electrolyte 1 and peeling due to it,
It is desired that the coefficient of thermal expansion be close to that of the solid electrolyte 1. Conventionally, in order to satisfy these requirements, NiO / Y
The SZ cermet is adopted as the fuel electrode, and NiO is changed to Ni in a high temperature reducing atmosphere during power generation.
【０００６】さらに空気電極３は、強い酸化性雰囲気に
置かれるから、電子伝導度および酸素イオン伝導度が高
くかつ分極を生じにくいこと、あるいは固体電解質１と
の熱膨張率の差が小さいことなどのほかに、耐酸化性に
優れていることが要求される。そこで従来では、酸素電
極３をペロブスカイト型ランタン系複合酸化物によって
形成している。Further, since the air electrode 3 is placed in a strong oxidizing atmosphere, it has high electron conductivity and oxygen ion conductivity and hardly causes polarization, or has a small difference in coefficient of thermal expansion from the solid electrolyte 1. Besides, it is required to have excellent oxidation resistance. Therefore, conventionally, the oxygen electrode 3 is formed of a perovskite-type lanthanum-based composite oxide.
【０００７】[0007]
【発明が解決しようとする課題】上述したように燃料電
極や空気電極に要求される事項は単純ではなく、それぞ
れの電極に要求される諸事項のすべてを満足する材料
は、現在のところ発見されていない。そのため各電極に
は、上述した材料が採用されているのであるが、従来の
燃料電極および空気電極のそれぞれは、主に高温安定性
を主眼として選択された単一材料によって形成されてい
るから、電子伝導度や酸素イオン伝導度が必ずしも高く
なく、あるいは分極を生じ易いなど、発電能力の向上を
阻害する傾向を示す不都合があった。As described above, the requirements for the fuel electrode and the air electrode are not simple, and materials satisfying all the requirements for each electrode have not been found at present. Not not. Therefore, the above-mentioned material is adopted for each electrode, but since each of the conventional fuel electrode and air electrode is formed of a single material mainly selected for high temperature stability, There is a disadvantage that the electron conductivity and the oxygen ion conductivity are not necessarily high, or that polarization easily occurs, which tends to hinder the improvement of the power generation capacity.
【０００８】この発明は、上記の事情を背景としてなさ
れたもので、燃料電池の発電能力を向上させることので
きる電極の構造を提供することを目的とするものであ
る。The present invention has been made in view of the above circumstances, and an object thereof is to provide an electrode structure capable of improving the power generation capacity of a fuel cell.
【０００９】[0009]
【課題を解決するための手段】この発明は、上記の目的
を達成するために、固体電解質を挟んで空気電極と燃料
電極とが形成された固体電解質型燃料電池の電極構造に
おいて、前記空気電極と燃料電極との少なくとも一方の
電極が、その固体電解質側の部分を酸素イオン伝導度の
高い材料によって形成され、かつこの部分とは反対側の
部分を電子伝導度の高い材料によって形成されているこ
とを特徴とするものである。In order to achieve the above object, the present invention provides an electrode structure of a solid oxide fuel cell in which an air electrode and a fuel electrode are formed with a solid electrolyte sandwiched between them. At least one of the fuel electrode and the fuel electrode has a portion on the solid electrolyte side made of a material having high oxygen ion conductivity, and a portion opposite to this portion made of a material having high electronic conductivity. It is characterized by that.
【００１０】[0010]
【作用】この発明の電極の構造においては、固体電解質
に近い部分では、酸素イオン伝導度が高いから、空気中
の酸素のイオン化および酸素と燃料ガスとの反応が促進
される。またこれとは反対の部分では、導電性が高くな
るので、電極としての内部抵抗が低くなり、換言すれ
ば、内部損失が少なくなる。その結果、燃料電池の全体
としては、起電力の増大および内部損失の低下によって
発電能力が高くなる。In the structure of the electrode of the present invention, the oxygen ion conductivity is high in the portion close to the solid electrolyte, so that the ionization of oxygen in the air and the reaction between oxygen and fuel gas are promoted. Further, in the portion opposite to this, since the conductivity becomes high, the internal resistance as an electrode becomes low, in other words, the internal loss becomes small. As a result, the power generation capacity of the fuel cell as a whole increases due to an increase in electromotive force and a decrease in internal loss.
【００１１】[0011]
【実施例】つぎにこの発明を実施例に基づいて詳細に説
明する。図１はこの発明に係る燃料電極を模式的に示す
断面図であり、この燃料電極２０は、ＹＳＺからなる薄
膜状の固体電解質１０の一方の表面側に形成されてい
る。この燃料電極２０は、その組成の相違から第１層な
いし第３層２１，２２，２３の３層構造になっている。
すなわちこの燃料電極２０は、ＹＳＺとＰr Ｏx とＳＤ
ＣとＮｉとの４種類の材料を主たる材料として形成され
ており、第１層２１は、それらのうちＹＳＺとＰr Ｏx
とＮｉとを配合した組成であり、それらの割合は、ＹＳ
Ｚを最も多くし、Ｐr Ｏx を中程度の割合とし、さらに
Ｎｉを少量とした割合である。また第２層２２は、ＹＳ
ＺとＳＤＣとＮｉとを配合した組成であり、これらを共
に、中程度の配合割合としたものである。さらに第３層
２３は、第２層２２と同様に、ＹＳＺとＳＤＣとＮｉと
を配合した組成であり、それらの配合割合は、ＹＳＺを
少量とし、かつＳＤＣを中程度の割合とし、さらにＮｉ
の割合を最も多くした組成である。EXAMPLES The present invention will now be described in detail based on examples. FIG. 1 is a cross-sectional view schematically showing a fuel electrode according to the present invention. This fuel electrode 20 is formed on one surface side of a thin film solid electrolyte 10 made of YSZ. The fuel electrode 20 has a three-layer structure of first to third layers 21, 22, and 23 due to the difference in composition.
That is, the fuel electrode 20 is composed of YSZ, PrOx and SD.
It is formed by mainly using four kinds of materials of C and Ni, and the first layer 21 has YSZ and PrOx among them.
And Ni are mixed, and their ratio is YS
Z is the largest, Pr Ox is a medium proportion, and Ni is a small proportion. The second layer 22 is made of YS.
It is a composition in which Z, SDC, and Ni are mixed, and both of them have a medium mixing ratio. Further, like the second layer 22, the third layer 23 has a composition in which YSZ, SDC, and Ni are blended, and the blending ratio thereof is such that YSZ is a small amount and SDC is a medium ratio.
Is the composition with the largest proportion of.
【００１２】ここでＳＤＣは、（Ｃe Ｏ2 ）0.8 （Ｓr
Ｏ1.5 ）0.2 の化学式で示される材料であって、分極を
生じにくい（分極特性に優れ）、かつある程度の酸素イ
オン伝導度および電子伝導度を有する電極材料である。
したがって第１層２１は、ＹＳＺの配合割合が多いこと
により、酸素イオン伝導度が高くなり、これに対してＮ
ｉの配合割合が少ないことにより、電子伝導度は低くな
る。またＰr Ｏx は酸素活性が高く、これを中程度配合
してあることにより分極が抑制される。Here, SDC is (Ce O 2 ) 0.8 (Sr
It is a material represented by the chemical formula of O 1.5 ) 0.2 , which is an electrode material that hardly causes polarization (excellent in polarization characteristics) and has oxygen ion conductivity and electronic conductivity to some extent.
Therefore, the first layer 21 has a high oxygen ion conductivity due to the high YSZ blending ratio.
Since the compounding ratio of i is small, the electron conductivity is low. Further, Pr Ox has a high oxygen activity, and its polarization is suppressed by mixing it in a medium amount.
【００１３】これに対して第１層２１とは反対側の第３
層２３は、ＹＳＺの配合割合が少なく、かつＮｉの配合
割合が多いので、酸素イオン伝導度は低くなるが、電子
伝導度が高くなる。またＳＤＣを中程度配合してあって
もＮｉの配合割合が多いことによりある程度、分極が生
じる。On the other hand, the third layer on the side opposite to the first layer 21
Since the layer 23 has a low YSZ blending ratio and a high Ni blending ratio, it has a low oxygen ion conductivity but a high electron conductivity. Further, even if SDC is mixed in a medium amount, polarization occurs to some extent due to a large Ni compounding ratio.
【００１４】これら第１層２１および第３層２３の中間
にある第２層２２は、ＹＳＺおよびＳＤＣならびにＮｉ
のそれぞれが中程度の配合割合であるから、酸素イオン
伝導度と電子伝導度とは、第１層２１と第３層２３との
中間の特性を示す。またこの第２層２２では、Ｎｉの配
合割合が中程度であるから、分極が抑制される。これら
第１層２１ないし第３層の組成および各特性をまとめて
示せば、図２の（Ａ）および（Ｂ）のとおりである。The second layer 22 intermediate between the first layer 21 and the third layer 23 is made of YSZ and SDC and Ni.
Since each of these has a medium mixing ratio, the oxygen ion conductivity and the electron conductivity show intermediate characteristics between those of the first layer 21 and the third layer 23. In addition, in the second layer 22, since the mixing ratio of Ni is medium, polarization is suppressed. The compositions and characteristics of the first layer 21 to the third layer are collectively shown in FIGS. 2 (A) and 2 (B).
【００１５】したがって上記の燃料電極２０では、固体
電解質１０に近い部分で酸素イオン伝導度が高いことに
より、酸素イオンと燃料ガス（水素ガス）との反応が促
進され、また濃度分極が抑制されるから、発電効率が高
くなる。またこの部分での電子伝導度が低いものの、こ
の第１層２１より外側の第２層２２および第３層２３で
の電子伝導度が次第に高くなっているから、これらの部
分で燃料電極２０の全体としての導電性を高めることが
でき、換言すれば、内部抵抗が低くなっている。さらに
固体電解質１０に接触する第１層２１が、固体電解質１
の素材であるＹＳＺを多量に含んでいるから、その熱膨
張率が固体電解質１０の熱膨張率と近似し、したがって
これら両者の間での熱応力の増大やそれに伴う剥離を未
然に防止することができる。Therefore, in the above fuel electrode 20, since the oxygen ion conductivity is high in the portion close to the solid electrolyte 10, the reaction between oxygen ions and the fuel gas (hydrogen gas) is promoted and the concentration polarization is suppressed. Therefore, the power generation efficiency becomes high. Although the electron conductivity in this portion is low, the electron conductivity in the second layer 22 and the third layer 23 outside the first layer 21 is gradually increasing. The conductivity as a whole can be increased, in other words, the internal resistance is low. Further, the first layer 21 contacting the solid electrolyte 10 is the solid electrolyte 1
Since it contains a large amount of YSZ, which is the material of the above, its coefficient of thermal expansion is close to that of the solid electrolyte 10, and therefore an increase in thermal stress between these two and prevention of peeling accompanying it are prevented. You can
【００１６】なお、上記の燃料電極２０を形成する方法
としては、溶射法やスラリー法など従来知られているセ
ラミックによる成膜法を採用することができる。またそ
の第１層２１の素材であるＰr Ｏx や第２層２２の素材
であるＳＤＣは、Ｎｉ−ＰrＯx やＮｉ−ＳＤＣの形で
ＹＳＺと共に用いられ、サーメットを形成する。As a method of forming the fuel electrode 20, a conventionally known film forming method using ceramics such as a thermal spraying method or a slurry method can be adopted. Further, PrOx which is the material of the first layer 21 and SDC which is the material of the second layer 22 are used together with YSZ in the form of Ni-PrOx or Ni-SDC to form a cermet.
【００１７】つぎに空気電極にこの発明を適用した例に
ついて説明する。図３はこの発明に係る空気電極３０を
模式的に示す断面図であり、この空気電極３０は薄膜状
の固体電解質１０の表面のうち燃料電極を形成した面と
は反対側の面に形成されている。そしてこの空気電極３
０は、固体電解質１０に接する第１層３１を（Ｌa 1-x
Ｓr x Ｍn Ｏ3 ）によって形成し、その第１層３１に重
ねた第２層３２を（Ｌa 1-x Ｓr x Ｃo Ｏ3 ）によって
形成した構成である。Next, an example in which the present invention is applied to an air electrode will be described. FIG. 3 is a cross-sectional view schematically showing the air electrode 30 according to the present invention. The air electrode 30 is formed on the surface of the thin film solid electrolyte 10 opposite to the surface on which the fuel electrode is formed. ing. And this air electrode 3
0 represents the first layer 31 in contact with the solid electrolyte 10 (La 1-x
Sr x Mn O 3 ) and the second layer 32, which is superposed on the first layer 31, is formed of (La 1-x Sr x Co O 3 ).
【００１８】この第１層３１を形成している（Ｌa 1-x
Ｓr x Ｍn Ｏ3 ）は、空気電極として最も一般に使用さ
れている材料であり、したがって固体電解質１０に接近
した部分では、酸素イオン伝導度が高くまた分極特性が
優れるから、酸素のイオン化を促進して発電効率を高く
することができる。この第１層３１は電子伝導度が若干
劣るが、その上に形成してある第２層３２が（Ｌa 1-x
Ｓr x Ｃo Ｏ3 ）を主剤とするものであるから、この第
２層３２での電子伝導度が高くなり、したがって空気電
極３０全体としての内部抵抗は低減される。また一方、
第１層３１の熱膨張率が固体電解質１０の熱膨張率と近
いから、両者の間の熱応力による剥離が抑制もしくは防
止される。The first layer 31 is formed (La 1-x
Sr x Mn O 3 ) is the most commonly used material for the air electrode, and therefore has high oxygen ion conductivity and excellent polarization characteristics in the portion close to the solid electrolyte 10 and thus promotes the ionization of oxygen. Power generation efficiency can be improved. The electron conductivity of the first layer 31 is slightly inferior, but the second layer 32 formed thereon is (La 1 -x
Since the main component is Sr x Co O 3 ), the electron conductivity of the second layer 32 is high, and therefore the internal resistance of the air electrode 30 as a whole is reduced. On the other hand,
Since the coefficient of thermal expansion of the first layer 31 is close to the coefficient of thermal expansion of the solid electrolyte 10, separation due to thermal stress between the two is suppressed or prevented.
【００１９】なお、この空気電極３０を形成する方法と
しては、前述した燃料電極を形成する場合と同様に、溶
射法やスラリー法などの従来のセラミックによる成膜法
を採用することができる。As a method for forming the air electrode 30, a conventional ceramic film forming method such as a thermal spraying method or a slurry method can be adopted as in the case of forming the fuel electrode described above.
【００２０】以上、燃料電極２０および空気電極３０を
複数層の傾斜構造とした場合について説明したが、この
ような構造の電極は、それぞれ単独で発電効率の向上に
有効に作用するのであり、したがってこの発明では、い
ずれか一方の電極のみを上述した傾斜機能構造としても
良い。またこの上記の実施例では、燃料電極を３層構造
とした例について説明したが、この発明は上記の実施例
に限定されるものではないのであり、２層構造もしくは
４層以上の構造としても良く、また明確に区分される複
数層にせずに機能もしくは特性が連続的に変化する構造
としても良い。これは空気電極についても同様であっ
て、この発明の空気電極は、２層構造に限定されるもの
ではない。The case where the fuel electrode 20 and the air electrode 30 have a multi-layered inclined structure has been described above. However, the electrodes having such a structure each independently work effectively to improve the power generation efficiency, and therefore, In the present invention, only one of the electrodes may have the functionally graded structure described above. Further, in the above-mentioned embodiment, an example in which the fuel electrode has a three-layer structure has been described, but the present invention is not limited to the above-mentioned embodiment, and may have a two-layer structure or a structure of four or more layers. It is also possible to have a structure in which the functions or characteristics are continuously changed without forming a plurality of layers that are clearly divided. The same applies to the air electrode, and the air electrode of the present invention is not limited to the two-layer structure.
【００２１】[0021]
【発明の効果】以上説明したようにこの発明の電極構造
によれば、固体電解質に近い部分での組成とこれとは離
れた部分での組成を異ならせ、発電効率に直接的に関与
する酸素イオン伝導度と集電効率に関与する電子伝導度
とを共に高くできるので、固体電解質型燃料電池の全体
としての発電効率を従来になく向上させることができ
る。As described above, according to the electrode structure of the present invention, the composition in the portion close to the solid electrolyte and the composition in the portion apart from the solid electrolyte are made different from each other, and oxygen directly related to power generation efficiency is obtained. Since both the ionic conductivity and the electronic conductivity that contributes to the current collection efficiency can be increased, the power generation efficiency of the solid oxide fuel cell as a whole can be improved as compared with the conventional case.
【図１】この発明の係る燃料電極を模式的に示す部分断
面図である。FIG. 1 is a partial sectional view schematically showing a fuel electrode according to the present invention.
【図２】その燃料電極の組成および特性をまとめて示す
図表である。FIG. 2 is a chart summarizing the composition and characteristics of the fuel electrode.
【図３】この発明に係る空気電極を模式的に示す部分断
面図である。FIG. 3 is a partial sectional view schematically showing an air electrode according to the present invention.
【図４】固体電解質型燃料電池の原理的な構造を模式的
な部分断面図である。FIG. 4 is a schematic partial cross-sectional view showing the principle structure of a solid oxide fuel cell.
１０…固体電解質、 ２０…燃料電極、 ２１…第１
層、 ２２…第２層、２３…第３層、 ３０…空気電
極、 ３１…第１層、 ３２…第２層。10 ... Solid electrolyte, 20 ... Fuel electrode, 21 ... First
Layer, 22 ... 2nd layer, 23 ... 3rd layer, 30 ... Air electrode, 31 ... 1st layer, 32 ... 2nd layer.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中島 武憲 東京都江東区木場一丁目５番１号 株式会 社フジクラ内 (72)発明者 山岡 悟 東京都江東区木場一丁目５番１号 株式会 社フジクラ内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takenori Nakajima 1-5-1 Kiba, Koto-ku, Tokyo Fujikura Ltd. (72) Inventor Satoru Yamaoka 1-1-5 Kiba, Koto-ku, Tokyo Shareholders Inside Fujikura
Claims (1)
とが形成された固体電解質型燃料電池の電極構造におい
て、 前記空気電極と燃料電極との少なくとも一方の電極が、
その固体電解質側の部分を酸素イオン伝導度の高い材料
によって形成され、かつこの部分とは反対側の部分を電
子伝導度の高い材料によって形成されていることを特徴
とする固体電解質型燃料電池の電極構造。1. An electrode structure of a solid oxide fuel cell in which an air electrode and a fuel electrode are formed with a solid electrolyte sandwiched therebetween, wherein at least one of the air electrode and the fuel electrode is
The solid electrolyte fuel cell is characterized in that the portion on the solid electrolyte side is formed of a material having high oxygen ion conductivity, and the portion opposite to this portion is formed of a material having high electron conductivity. Electrode structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21513293A JP3330198B2 (en) | 1993-08-06 | 1993-08-06 | Solid oxide fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21513293A JP3330198B2 (en) | 1993-08-06 | 1993-08-06 | Solid oxide fuel cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0757746A true JPH0757746A (en) | 1995-03-03 |
| JP3330198B2 JP3330198B2 (en) | 2002-09-30 |
Family
ID=16667242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21513293A Expired - Lifetime JP3330198B2 (en) | 1993-08-06 | 1993-08-06 | Solid oxide fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3330198B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002035634A1 (en) * | 2000-10-23 | 2002-05-02 | Stichting Energieonderzoek Centrum Nederland | Anode assembly for an electrochemical cell |
| JP2010027457A (en) * | 2008-07-22 | 2010-02-04 | Mitsubishi Heavy Ind Ltd | Power generation membrane of solid electrolyte fuel cell, and solid electrolyte fuel cell equipped with the same, as well as method of manufacturing power generation membrane of solid electrolyte fuel cell |
| JP2010177105A (en) * | 2009-01-30 | 2010-08-12 | Mitsubishi Heavy Ind Ltd | Power generation film for solid electrolyte fuel cell, and solid electrolyte fuel cell with the same |
| WO2012133438A1 (en) * | 2011-03-31 | 2012-10-04 | 独立行政法人産業技術総合研究所 | Medium-to-low-temperature high-efficiency electrochemical cell and electrochemical reaction system comprising same |
| WO2023203870A1 (en) * | 2022-04-18 | 2023-10-26 | 日本碍子株式会社 | Electrochemical cell |
| WO2023203875A1 (en) * | 2022-04-18 | 2023-10-26 | 日本碍子株式会社 | Electrochemical cell |
-
1993
- 1993-08-06 JP JP21513293A patent/JP3330198B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002035634A1 (en) * | 2000-10-23 | 2002-05-02 | Stichting Energieonderzoek Centrum Nederland | Anode assembly for an electrochemical cell |
| JP2010027457A (en) * | 2008-07-22 | 2010-02-04 | Mitsubishi Heavy Ind Ltd | Power generation membrane of solid electrolyte fuel cell, and solid electrolyte fuel cell equipped with the same, as well as method of manufacturing power generation membrane of solid electrolyte fuel cell |
| JP2010177105A (en) * | 2009-01-30 | 2010-08-12 | Mitsubishi Heavy Ind Ltd | Power generation film for solid electrolyte fuel cell, and solid electrolyte fuel cell with the same |
| WO2012133438A1 (en) * | 2011-03-31 | 2012-10-04 | 独立行政法人産業技術総合研究所 | Medium-to-low-temperature high-efficiency electrochemical cell and electrochemical reaction system comprising same |
| WO2023203870A1 (en) * | 2022-04-18 | 2023-10-26 | 日本碍子株式会社 | Electrochemical cell |
| WO2023203875A1 (en) * | 2022-04-18 | 2023-10-26 | 日本碍子株式会社 | Electrochemical cell |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3330198B2 (en) | 2002-09-30 |
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