JPH04206269A - Solid electrolyte fuel cell - Google Patents
Solid electrolyte fuel cellInfo
- Publication number
- JPH04206269A JPH04206269A JP2333347A JP33334790A JPH04206269A JP H04206269 A JPH04206269 A JP H04206269A JP 2333347 A JP2333347 A JP 2333347A JP 33334790 A JP33334790 A JP 33334790A JP H04206269 A JPH04206269 A JP H04206269A
- Authority
- JP
- Japan
- Prior art keywords
- air electrode
- solid electrolyte
- air
- electrode
- fuel cell
- 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.)
- Pending
Links
- 239000007784 solid electrolyte Substances 0.000 title claims abstract description 27
- 239000000446 fuel Substances 0.000 title claims description 30
- 239000002131 composite material Substances 0.000 claims abstract description 6
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 5
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims abstract description 5
- 230000035699 permeability Effects 0.000 claims description 9
- 239000011148 porous material Substances 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 10
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract description 9
- 229910001882 dioxygen Inorganic materials 0.000 abstract description 9
- 238000000926 separation method Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 229910002084 calcia-stabilized zirconia Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000006479 redox reaction Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910001233 yttria-stabilized zirconia Inorganic materials 0.000 description 2
- BQENXCOZCUHKRE-UHFFFAOYSA-N [La+3].[La+3].[O-][Mn]([O-])=O.[O-][Mn]([O-])=O.[O-][Mn]([O-])=O Chemical compound [La+3].[La+3].[O-][Mn]([O-])=O.[O-][Mn]([O-])=O.[O-][Mn]([O-])=O BQENXCOZCUHKRE-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
-
- 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
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は固体電解質を介して酸化還元反応を生じさせ
ることにより起電力を得る燃料電池に関するものである
。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a fuel cell that generates electromotive force by causing a redox reaction through a solid electrolyte.
従来の技術 この種の燃料電池の一例を第５図に概略図として示す。Conventional technology An example of this type of fuel cell is shown schematically in FIG.
すなわち符号１は支持管であって、アルミナ（Ａ１２ｏ
３）などの粉末材料からなる焼結体であり、その外周に
空気電極２および固体電解質３が順次積層して形成され
ており、さらにその外周に燃料電極４が形成されている
。この燃料電極４は一部切り欠いた状態になっており、
ここに空気電極２に導通したインターコネクタ５が突出
して設けられている。That is, reference numeral 1 is a support tube made of alumina (A12o
It is a sintered body made of a powder material such as 3), and has an air electrode 2 and a solid electrolyte 3 sequentially laminated on its outer periphery, and further has a fuel electrode 4 formed on its outer periphery. This fuel electrode 4 is partially cut out,
An interconnector 5 that is electrically connected to the air electrode 2 is provided here in a protruding manner.
上記の空気電極２および燃料電極４のそれぞれは多孔構
造であって、空気電極２の内周側に酸素ガスもしくは空
気を流し、かつ燃料電極４の外周側に例えば水素ガスを
流すことにより、酸素イオンが固体電解質３を燃料電極
４側に透過して燃料電極４側で酸化還元反応が生じ、そ
れに伴う起電力を空気電極２および燃料電極４から外部
に取り出すことができる。Each of the above-mentioned air electrode 2 and fuel electrode 4 has a porous structure, and by flowing oxygen gas or air to the inner circumference of the air electrode 2 and flowing, for example, hydrogen gas to the outer circumference of the fuel electrode 4, oxygen can be removed. Ions permeate through the solid electrolyte 3 toward the fuel electrode 4 side, a redox reaction occurs on the fuel electrode 4 side, and the electromotive force accompanying this can be taken out from the air electrode 2 and the fuel electrode 4.
したがって燃料電池では、固体電解質３の内周画および
外周面のそれぞれに空気もしくは酸素ガスおよび燃料ガ
スが充分供給されかつ拡散する必要があるが、上記の燃
料電池では、支持管１の外周面に空気電極２を形成する
とともに、その外周面に固体電解質３の層を形成してい
るから、空気もしくは酸素ガスは支持管１および空気電
極２を透過して固体電解質３の内周面に供給されること
になるので、その流動抵抗が大きく、空気もしくは酸素
ガスの供給が充分に行われずに発電効率が悪くなるおそ
れがあった。Therefore, in a fuel cell, air or oxygen gas and fuel gas need to be sufficiently supplied and diffused to each of the inner and outer circumferential surfaces of the solid electrolyte 3, but in the above fuel cell, the outer circumferential surface of the support tube 1 is Since the air electrode 2 is formed and a layer of solid electrolyte 3 is formed on its outer peripheral surface, air or oxygen gas passes through the support tube 1 and the air electrode 2 and is supplied to the inner peripheral surface of the solid electrolyte 3. As a result, the flow resistance is large, and there is a risk that the supply of air or oxygen gas will not be sufficient, resulting in poor power generation efficiency.
また支持管１と空気電極２とは、その素材および構造が
、それぞれに要求される特性から自ずと異なっており、
しかも発電時には電池の全体が高温になるから、支持管
１と空気電極２との剥離やいずれかの亀裂などが生じる
おそれがあった。Furthermore, the materials and structures of the support tube 1 and the air electrode 2 are naturally different due to the characteristics required for each.
Moreover, since the entire battery becomes high in temperature during power generation, there is a risk that the support tube 1 and the air electrode 2 may peel off or cracks may occur.
そこで本出願人は、空気電極に支持管としての機能を付
与した燃料電池を開発した。これは、円筒状の空気電極
の肉厚をある程度厚くしてその剛性を高＜シ、その外周
面に固体電解質の層および燃料電極を順次形成した構造
であって、第５図に示す従来の燃料電池に比較して構成
要素が少ないから、上述したような問題は生じない。Therefore, the present applicant has developed a fuel cell in which an air electrode is given the function of a support tube. This is a structure in which the wall thickness of a cylindrical air electrode is increased to a certain extent to increase its rigidity, and a layer of solid electrolyte and a fuel electrode are sequentially formed on the outer circumferential surface of the electrode. Since there are fewer components compared to fuel cells, the above-mentioned problems do not occur.
発明が解決しようとする課題
しかるに空気電極は高温状態で酸化雰囲気に置かれるか
ら、耐酸化性に優れたものであることが必要であり、従
来一般には、ペロブスカイト型ランタン系複合酸化物の
粉末材料を焼結して形成することが好ましいとされてい
る。しかしながらこれを支持管として機能する程度の剛
性を有するよう形成する場合の特性については何等知ら
れていず、電池として実用に耐え得る空気電極を得るこ
とは甚だ困難であった。Problems to be Solved by the Invention However, since air electrodes are placed in an oxidizing atmosphere at high temperatures, they must have excellent oxidation resistance. It is said that it is preferable to form it by sintering. However, nothing is known about the characteristics of forming this so that it has enough rigidity to function as a support tube, and it has been extremely difficult to obtain an air electrode that can be put to practical use as a battery.
この発明は上記の事情を背景としてなされたもので、空
気電極が支持管を兼ねるよう構成した燃“ 料電池であ
って、充分な耐久性および発電効率を得ることのできる
燃料電池を提供することを目的とするものである。The present invention was made against the background of the above-mentioned circumstances, and an object of the present invention is to provide a fuel cell configured such that an air electrode also serves as a support tube, and which can obtain sufficient durability and power generation efficiency. The purpose is to
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、筒状の固体
電解質と、その内周もしくは外周に密着して設けられた
多孔質空気電極と、固体電解質の内周もしくは外周のう
ち空気電極とは反対側に密着して設けられた多孔質燃料
電極とからなる固体電解質型燃料電池であって、前記空
気電極が、ペロブスカイト型ランタン系複合酸化物から
なり、かつその導電率が５０ｓ／ａｍ以上、ガス透過係
数が１ 、 ＯＸ １０−’ｃｃ−ｃｎ／ ｓｅｃ（
ｇ／ａｌ） ・ｃｍ２以上、膨張係数が１０〜１２Ｘ
１０−６／Ｋ、平均気孔径が０．１〜５０μｍに設定さ
れていることを特徴とするのである。Means for Solving the Problems In order to achieve the above object, the present invention includes a cylindrical solid electrolyte, a porous air electrode provided in close contact with the inner or outer periphery of the cylindrical solid electrolyte, and an inner periphery of the solid electrolyte. Or a solid oxide fuel cell comprising a porous fuel electrode provided in close contact with the outer periphery on the side opposite to the air electrode, wherein the air electrode is made of a perovskite-type lanthanum-based composite oxide; Electrical conductivity is 50 s/am or more, gas permeability coefficient is 1, OX 10-'cc-cn/sec (
g/al) ・cm2 or more, expansion coefficient 10-12X
10-6/K and an average pore diameter of 0.1 to 50 μm.
作 用
この発明の燃料電池においても、空気電極と固体電解質
とが互いに密着しており、空気や酸素ガスは空気電極を
透過して固体電解質の表面に供給かつ拡散させられ、さ
らに空気電極が陽極となるが、導電率を上記の値以上に
設定しであるから、空気電極の内部での電圧降下を防ぐ
ことができ、またガス透過係数および平均気孔径のそれ
ぞれを上記の値に設定しであるから、固体電解質の表面
に空気もしくは酸素ガスを充分に供給して発電を行うこ
とができる。さらに膨張係数を上記の値の範囲に設定し
ているから、固体電解質からの剥離や亀裂の発生を防止
し、耐久性に優れたものとすることができる。Function: Also in the fuel cell of this invention, the air electrode and the solid electrolyte are in close contact with each other, and air and oxygen gas are supplied and diffused to the surface of the solid electrolyte by passing through the air electrode, and the air electrode is connected to the anode. However, since the conductivity is set above the above value, voltage drop inside the air electrode can be prevented, and the gas permeability coefficient and average pore diameter can be set to the above values. Therefore, it is possible to generate electricity by supplying a sufficient amount of air or oxygen gas to the surface of the solid electrolyte. Furthermore, since the expansion coefficient is set within the above value range, peeling from the solid electrolyte and generation of cracks can be prevented and excellent durability can be achieved.
実 施 例 つぎにこの発明を実施例に基づいて説明する。Example Next, the present invention will be explained based on examples.
第１図はこの発明の一実施例を示す模式的な斜視図であ
って、空気電極１０は比較的厚肉の円筒状に形成される
とともに、その内部が空気もしくは酸素ガスの流路とさ
れている。この空気電極１０の外周に固体電解質１１お
よび燃料電極１２が順次積層して形成されている。なお
、固体電解質１１および燃料電極１２は図に示すように
一部切り欠かれており、その切り欠いた部分に、空気電
極１０に導通しかつ固体電解質１１の外周側にわずか突
出するインターコネクタ１３が設けられている。そして
全体の外周側が水素ガスなどの燃料ガス流路とされてい
る。FIG. 1 is a schematic perspective view showing an embodiment of the present invention, in which an air electrode 10 is formed in a relatively thick cylindrical shape, and the inside thereof is used as a flow path for air or oxygen gas. ing. A solid electrolyte 11 and a fuel electrode 12 are sequentially stacked on the outer periphery of the air electrode 10 . Note that the solid electrolyte 11 and the fuel electrode 12 are partially cut out as shown in the figure, and an interconnector 13 that is electrically connected to the air electrode 10 and slightly protrudes toward the outer circumferential side of the solid electrolyte 11 is installed in the cutout part. is provided. The entire outer circumferential side is used as a flow path for fuel gas such as hydrogen gas.
上述した構成の燃料電池のうち、空気電極１０はランタ
ンマンガナイトなどの下記の一般式で表されるペロブス
カイト型ランタン系複合酸化物を焼結して形成した多孔
質体である。In the fuel cell configured as described above, the air electrode 10 is a porous body formed by sintering a perovskite-type lanthanum-based composite oxide represented by the following general formula, such as lanthanum manganite.
Ｌ！ Ｓｒ ＭｎＯ３−。L! Sr MnO3-.
１！ ！
（ｘ−０〜０．５’、 ｙ ＝０〜０．５ ）また固体
電解質１１はイツトリア安定化ジルコニア（ＹＳＺ）も
しくはカルシア安定化ジルコニア（Ｃ８Ｚ）によって形
成されている。1! ! (x-0 to 0.5', y = 0 to 0.5) Furthermore, the solid electrolyte 11 is formed of yttria-stabilized zirconia (YSZ) or calcia-stabilized zirconia (C8Z).
さらに燃料電極１２およびインターコネクタ１３はニッ
ケルＮ１もしくはニッケルとジルコニアとの複合材（Ｎ
＋ ＋ Ｚ ｒ Ｏ２）によって形成されている。Further, the fuel electrode 12 and the interconnector 13 are made of nickel N1 or a composite material of nickel and zirconia (N
+ + Z r O2).
そして上記の空気電極１．０は、導電率が５０ｓ／ａｎ
以上、ガス透過係数が１．０×１０−’ｃｃ−ｏｎ／ｓ
ｅｅ（ｇ／ａｌ） ・ｃｍ２以上、膨張係数が１０〜
１２×１０”６／Ｋ、平均気孔径が０．１〜５０μｌに
設定されている。The above air electrode 1.0 has a conductivity of 50 s/an
Above, the gas permeability coefficient is 1.0×10-'cc-on/s
ee (g/al) ・cm2 or more, expansion coefficient 10~
The average pore size is set to 12×10”6/K and 0.1 to 50 μl.
これらの値は本発明者等の実験に基づいて、実用に供し
得るものとして初めて、求められたものであり、その実
験の結果を下記の一覧表に示す。These values were determined for the first time based on experiments conducted by the present inventors, and were found to be practically applicable, and the results of the experiments are shown in the table below.
（注）導電率：ｓ／ａｉ
ガス透過係数： ｃｅ−ａｍ／ｓｅｃ Ｉｔ／ａｌ）
・ｄ膨張係数：に−１
平均気孔径二μＩ
なお、上記の表に示す評価は、所定の電圧に対して予め
決めた値以上の電流密度が得られた否か、剥離や亀裂が
生じたか否かによって行った。(Note) Electrical conductivity: s/ai Gas permeability coefficient: ce-am/sec It/al)
・d expansion coefficient: -1 Average pore diameter 2 μI The evaluation shown in the table above is based on whether a current density higher than a predetermined value was obtained for a given voltage, and whether peeling or cracking occurred. I went by whether or not.
以下具体的に説明する。This will be explained in detail below.
まず導電率について説明すると、表のＮＩＩＬｌ、
２゜３に示すように、ガス透過係数、膨張係数および平
均気孔径を同一にし、導電率を４Ｑｓ／ａ１１，５０ｓ
／ａｍ、１００ｓ／ａｍに変えたところ、第２図に示す
ように空気電極の導電率を４０ｓ／ａｍとした燃料電池
では、０．６ｖの電圧のとき電流密度は１５０ｍＡ／ａ
ｌＬかなく、これに対して導電率を５０ｓ／ｃｍとした
ときには電流密度が２１０ｍＡ／ｃｉとなり、さらに１
００Ｓ／ａ１１としたときには電流密度が３００ｍＡ／
ｃａｒとなった。これらの結果から、この発明では空気
電極の導電率を４Ｑｓ／ａ１１以上とした、
またガス透過係数については、表のｔｋ４．５゜６に示
すように、１．［ｌ Ｘ１ｌｌ’、 １．１１ Ｘ１
０’、 １．０Ｘ １０−４ （ｃｃ ・ａｎ ／ ｓ
ｅｅ （ｇ／ａｉ） ・ａｌ）に変え、他の条件を同
一にしたところ、第３図に示すように、１、 ＯＸ ｌ
Ｏ’ｉ ｃｅ ＊ ａｌ／ ｓｅｅ （ｇ／ａ／ｌ
・ａｌの場合には、電流密度が低すぎて実用に不向きで
あり、これに反して１．０ Ｘ １０−４ ｃｃ−ａｎ
／ ５ｅｃ（ｉ／ｃｄ） ・ａｌでは、０．６ｖの電
圧に対して２５０ｍＡ／ａＩｒの電流密度を得ることが
できた。これらの結果からこの発明では、ガス透過率を
１．０×１０°４ ｃｃ ａ ａｍ ／ ｓｅｃ （ｇ
／ａＩｒ）・−以上とした。First, to explain the conductivity, NIILl in the table,
As shown in Figure 2.3, the gas permeability coefficient, expansion coefficient, and average pore diameter are the same, and the electrical conductivity is 4Qs/a11,50s.
/am, 100s/am, as shown in Figure 2, in a fuel cell with an air electrode conductivity of 40s/am, the current density is 150mA/a at a voltage of 0.6V.
On the other hand, when the conductivity is 50 s/cm, the current density is 210 mA/ci, and 1
When set to 00S/a11, the current density is 300mA/
It became a car. From these results, in this invention, the electrical conductivity of the air electrode was set to 4Qs/a11 or more, and the gas permeability coefficient was set to 1.1 as shown in tk4.5°6 in the table. [l X1ll', 1.11 X1
0', 1.0X 10-4 (cc ・an/s
ee (g/ai) ・al) and keeping other conditions the same, as shown in Figure 3, 1, OX l
O'i ce * al/ see (g/a/l
- In the case of al, the current density is too low and is not suitable for practical use; on the other hand, 1.0 x 10-4 cc-an
/5ec(i/cd)・al, it was possible to obtain a current density of 250 mA/aIr for a voltage of 0.6 V. Based on these results, in this invention, the gas permeability is set to 1.0×10°4 cc a am / sec (g
/aIr)・- or more.
さらに膨張係数については、９ＸＩ０４／にとしたとこ
ろ（表の１ｌｋＬ７）、空気電極と固体電極との間に剥
離が生じ、また１３Ｘ１０４／にとしたところ（表のＮ
１１９） 、空気電極にクラックが生じた。Furthermore, when the expansion coefficient was set to 9XI04/ (1lkL7 in the table), separation occurred between the air electrode and the solid electrode, and when it was set to 13X104/ (N
119), a crack occurred in the air electrode.
そこでこの発明では空気電極の膨張係数を、上記の値の
中間値、すなわち１０〜１２Ｘ１０４／にとした。これ
らの値のいずれかであれば、剥離やクラックの発生は認
められなかった。Therefore, in this invention, the expansion coefficient of the air electrode is set to an intermediate value between the above values, that is, 10 to 12×10 4 /. At any of these values, no peeling or cracking was observed.
そして平均気孔径については表のｋｌｏ、１１゜１２お
よび第４図に示すとおりであり、０．１〜１００μｍで
あれば、充分な電流密度を得ることができ、したがって
この発明では、平均気孔径をこれらの値に限定した。The average pore diameter is as shown in the table klo, 11°12, and Figure 4. If it is 0.1 to 100 μm, sufficient current density can be obtained. Therefore, in this invention, the average pore diameter was limited to these values.
これらの結果から、空気電極の各値を上記のように設定
することにより、充分な起電力および耐久性を得ること
ができる。From these results, sufficient electromotive force and durability can be obtained by setting each value of the air electrode as described above.
発明の効果
以上の説明から明らかなようにこの発明によれば、空気
電極が強度部材である支持管を兼ねていても、実用に供
し得る程度の充分な起電力で、かつ耐久性のある燃料電
池を得ることができる。Effects of the Invention As is clear from the above explanation, according to the present invention, even if the air electrode also serves as a support tube, which is a strength member, the fuel can be produced with sufficient electromotive force and durability for practical use. You can get batteries.
第１図はこの発明の一実施例を示す概略図、第２図ない
し第４図はこの発明の燃料電池についての実験結果を示
す線図であって、第２図は導電率をパラメータとした電
圧と電流密度との関係を示し、第３図はガス透過係数を
パラメータとした電圧と電流密度との関係を示し、さら
に第４図は平均気孔径と電流密度との関係を示す。第５
図は支持管のある従来の燃料電池の一例を示す概略図で
ある。
１０・・・空気電極、 １１・・・固体電解質、 １２
・・・燃料電極。
第２図
を−丸”３５・７を
第３図
第４図
平均気化奔
第５図FIG. 1 is a schematic diagram showing an embodiment of the present invention, and FIGS. 2 to 4 are diagrams showing experimental results regarding the fuel cell of the present invention, and FIG. 2 shows conductivity as a parameter. The relationship between voltage and current density is shown, FIG. 3 shows the relationship between voltage and current density using the gas permeability coefficient as a parameter, and FIG. 4 shows the relationship between average pore diameter and current density. Fifth
The figure is a schematic diagram showing an example of a conventional fuel cell with a support tube. 10... Air electrode, 11... Solid electrolyte, 12
...Fuel electrode. Figure 2 - circle 35.7 Figure 3 Figure 4 Average vaporization rate Figure 5
Claims (1)
て設けられた多孔質空気電極と、固体電解質の内周もし
くは外周のうち空気電極とは反対側に密着して設けられ
た多孔質燃料電極とからなる固体電解質型燃料電池にお
いて、 前記空気電極が、ペロブスカイト型ランタン系複合酸化
物からなり、かつその導電率が５０ｓ／ｃｍ以上、ガス
透過係数が１．０×１０＾−＾４ｃｃ・ｃｍ／ｓｅｃ（
ｇ／ｃｍ＾２）・ｃｍ＾２以上、膨張係数が１０〜１２
×１０＾−＾６／Ｋ、平均気孔径が０．１〜５０μｍに
設定されていることを特徴とする固体電解質型燃料電池
。[Claims] A cylindrical solid electrolyte, a porous air electrode provided in close contact with the inner or outer periphery of the solid electrolyte, and a porous air electrode provided in close contact with the inner or outer periphery of the solid electrolyte on the side opposite to the air electrode. In a solid oxide fuel cell comprising a porous fuel electrode, the air electrode is made of a perovskite-type lanthanum-based composite oxide, and has an electrical conductivity of 50 s/cm or more and a gas permeability coefficient of 1.0×. 10^-^4cc・cm/sec(
g/cm^2)・cm^2 or more, expansion coefficient 10-12
×10^-^6/K, and an average pore diameter of 0.1 to 50 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2333347A JPH04206269A (en) | 1990-11-29 | 1990-11-29 | Solid electrolyte fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2333347A JPH04206269A (en) | 1990-11-29 | 1990-11-29 | Solid electrolyte fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04206269A true JPH04206269A (en) | 1992-07-28 |
Family
ID=18265099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2333347A Pending JPH04206269A (en) | 1990-11-29 | 1990-11-29 | Solid electrolyte fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04206269A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61171064A (en) * | 1985-01-22 | 1986-08-01 | ウエスチングハウス エレクトリック コ−ポレ−ション | Pneumatic electrode material for high temperature electrochemical battery |
| JPH01105472A (en) * | 1987-10-16 | 1989-04-21 | Mitsubishi Heavy Ind Ltd | Solid electrolyte fuel cell |
| JPH02262260A (en) * | 1989-03-22 | 1990-10-25 | Westinghouse Electric Corp <We> | Porous fuel electrode |
| JPH0467564A (en) * | 1990-07-07 | 1992-03-03 | Ngk Insulators Ltd | Solid electrolytic fuel cell and porous electrode body using the same |
-
1990
- 1990-11-29 JP JP2333347A patent/JPH04206269A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61171064A (en) * | 1985-01-22 | 1986-08-01 | ウエスチングハウス エレクトリック コ−ポレ−ション | Pneumatic electrode material for high temperature electrochemical battery |
| JPH01105472A (en) * | 1987-10-16 | 1989-04-21 | Mitsubishi Heavy Ind Ltd | Solid electrolyte fuel cell |
| JPH02262260A (en) * | 1989-03-22 | 1990-10-25 | Westinghouse Electric Corp <We> | Porous fuel electrode |
| JPH0467564A (en) * | 1990-07-07 | 1992-03-03 | Ngk Insulators Ltd | Solid electrolytic fuel cell and porous electrode body using the same |
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