JPH06295731A - Manufacture of negative electrode for solid electrolyte type electrolytic cell - Google Patents
Manufacture of negative electrode for solid electrolyte type electrolytic cellInfo
- Publication number
- JPH06295731A JPH06295731A JP5083304A JP8330493A JPH06295731A JP H06295731 A JPH06295731 A JP H06295731A JP 5083304 A JP5083304 A JP 5083304A JP 8330493 A JP8330493 A JP 8330493A JP H06295731 A JPH06295731 A JP H06295731A
- Authority
- JP
- Japan
- Prior art keywords
- solid electrolyte
- powder
- electrolytic cell
- slurry
- baked
- 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.)
- Withdrawn
Links
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
【０００１】[0001]
【産業上の利用分野】本発明は固体電解質型燃料電池や
固体電解質型高温水蒸気電解装置における固体電解質型
電解セルの陰極の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a cathode of a solid electrolyte type electrolytic cell in a solid electrolyte type fuel cell or a solid electrolyte type high temperature steam electrolyzer.
【０００２】[0002]
【従来の技術】固体電解質型燃料電池の電解セルを例に
とって説明すると、該電解セルは図２に示すように通常
イットリア安定化ジルコニア（ＹＳＺ）が用いられる固
体電解質１の各々の面に燃料極２および空気極３が焼付
けてある。通常、固体電解質の厚みは数百μｍ、各電極
の厚みは数十μｍである。これに１０００℃で燃料極側
に水素、空気極側に空気を流して発電を行わせている。2. Description of the Related Art An electrolytic cell of a solid oxide fuel cell will be described as an example. As shown in FIG. 2, the electrolytic cell is usually made of yttria-stabilized zirconia (YSZ). 2 and the air electrode 3 are baked. Usually, the thickness of the solid electrolyte is several hundred μm, and the thickness of each electrode is several tens μm. At 1000 ° C., hydrogen is supplied to the fuel electrode side and air is supplied to the air electrode side to generate electricity.
【０００３】[0003]
【発明が解決しようとする課題】この燃料極は例えば酸
化ニッケルの粉末とＹＳＺ粉末の混合スラリを、予め焼
結しておいた緻密な固体電解質の表面に塗布し焼結す
る。燃料極はガスが拡散する必要があるために多孔質体
としている。酸化ニッケルが燃料ガス（通常、水素が用
いられる）と反応してニッケル金属となり電極として作
用するわけであるが、時間の経過と共に図３に示すよう
にニッケルが凝集し、電極の性能が低下するという不具
合がある。In this fuel electrode, for example, a mixed slurry of nickel oxide powder and YSZ powder is applied to the surface of a dense solid electrolyte that has been previously sintered and then sintered. The fuel electrode is made porous because gas needs to diffuse. Nickel oxide reacts with fuel gas (usually hydrogen is used) to become nickel metal and acts as an electrode, but as time passes, nickel aggregates and the performance of the electrode deteriorates. There is a problem called.
【０００４】本発明は上記技術水準に鑑み、従来の陰極
における経時変化による不具合のない固体電解質型電解
セルの陰極の製造方法を提供しようとするものである。In view of the above-mentioned state of the art, the present invention is to provide a method for producing a cathode of a solid electrolyte type electrolytic cell which is free from the problems of the conventional cathode due to aging.
【０００５】[0005]
【課題を解決するための手段】本発明は従来の固体電解
質型電解セルの陰極はニッケルが凝集するために電極性
能が低下することに着目してニッケルが凝集しにくいよ
うにすることを試みた結果、本発明を完成するに至っ
た。The present invention has attempted to prevent nickel from aggregating, paying attention to the fact that the cathode of a conventional solid electrolyte type electrolytic cell has a negative electrode performance due to nickel aggregating. As a result, the present invention has been completed.
【０００６】本発明は酸化ニッケル粉末と固体電解質粉
末とを予め混合して仮焼し、該仮焼物を粉砕して溶媒に
分散させてなるスラリを固体電解質の片面に塗布焼成す
ることを特徴とする固体電解質型電解セルの陰極の製造
方法である。The present invention is characterized in that nickel oxide powder and solid electrolyte powder are premixed and calcined, and a slurry obtained by pulverizing the calcined product and dispersing it in a solvent is applied and baked on one surface of the solid electrolyte. Is a method for producing a cathode of a solid electrolyte type electrolytic cell.
【０００７】[0007]
【作用】固体電解質粉末と酸化ニッケル粉末を混合して
予め焼成し、それを粉砕したことにより、１つの粒子の
中に固体電解質と酸化ニッケルが共存し、燃料極のニッ
ケルが固体電解質に取り囲まれ、ニッケルの凝集を空間
的に妨害する。[Function] The solid electrolyte powder and the nickel oxide powder are mixed and fired in advance, and by pulverizing the powder, the solid electrolyte and the nickel oxide coexist in one particle, and the nickel in the fuel electrode is surrounded by the solid electrolyte. , Spatially impedes the agglomeration of nickel.
【０００８】本発明において使用される固体電解質とし
ては安定化ジルコニア（Ｙ2 Ｏ3 が８〜１２モル％が入
ったＺｒＯ2 ）、部分安定化ジルコニア（Ｙ2 Ｏ3 が８
モル％未満のＺｒＯ2 ）、サマリウムをドープした酸化
セリウムなどが使用できる。The solid electrolyte used in the present invention includes stabilized zirconia (ZrO 2 containing 8 to 12 mol% of Y 2 O 3 ) and partially stabilized zirconia (Y 2 O 3 of 8).
ZrO 2) less than mole%, and cerium oxide doped with samarium can be used.
【０００９】酸化ニッケル粉末と固体電解質とを予め混
合したものは一般的に空気中で１〜１０時間、８００〜
１１００℃で仮焼される。また、この仮焼物は一般的に
１０μｍ以下、好ましくは１μ程度にまで粉砕される。
こゝにおいて使用される固体電解質は上記と同じもので
も異なるものでもよい。A mixture of the nickel oxide powder and the solid electrolyte previously mixed is generally 800 to 800 for 1 to 10 hours in air.
It is calcined at 1100 ° C. The calcined product is generally pulverized to 10 μm or less, preferably about 1 μm.
The solid electrolyte used here may be the same as or different from the above.
【００１０】この粉砕物は溶媒に分散され、スラリとな
って固体電解質の片面に塗布された後、一般的に空気中
で１〜１０時間、１２００〜１５００℃の温度で焼成さ
れて陰極となる。The pulverized product is dispersed in a solvent to form a slurry, which is applied to one surface of the solid electrolyte, and then generally fired in air at a temperature of 1200 to 1500 ° C. for 1 to 10 hours to form a cathode. .
【００１１】[0011]
【実施例】平均粒径０．５μｍの酸化ニッケル粉末と平
均粒径０．３μｍのＹＳＺ粉末を７：３の割合で混合し
て１０００℃で焼成した。焼成品をボールミルで粉砕
し、１μｍ以下の粒子としたのち、溶媒としてエタノー
ル、分散剤として有機系分散剤、有機バインダとしてポ
リビニルブチラールを添加したスラリとした。このスラ
リを固体電解質（ＹＳＺ）に塗布後、１４００℃で焼付
て燃料電極とした。EXAMPLE A nickel oxide powder having an average particle size of 0.5 μm and a YSZ powder having an average particle size of 0.3 μm were mixed at a ratio of 7: 3 and fired at 1000 ° C. The calcined product was crushed with a ball mill into particles of 1 μm or less, and then ethanol was used as a solvent, an organic dispersant was used as a dispersant, and polyvinyl butyral was added as an organic binder to obtain a slurry. This slurry was applied on a solid electrolyte (YSZ) and then baked at 1400 ° C. to obtain a fuel electrode.
【００１２】なお、比較のため、従来法に従い予め焼成
した粉末を用いずに、元の酸化ニッケルとＹＳＺの粉末
をそれぞれ添加したものをスラリとし、以下上記方法と
同様にして燃料電極を製造した。For comparison, a fuel electrode was manufactured in the same manner as the above method by using a slurry obtained by adding the original nickel oxide powder and YSZ powder, respectively, without using the powder previously fired according to the conventional method. .
【００１３】上記実施例で製造した電解セル及び従来法
で製造した電解セルの発電性能を図１に示す。図１に示
すように、従来型のセルは約３日位で性能が低下して使
えなくなったが、本発明の実施例のセルは劣化がなく長
期使用が可能となった。FIG. 1 shows the power generation performance of the electrolytic cell manufactured in the above-mentioned example and the electrolytic cell manufactured by the conventional method. As shown in FIG. 1, the performance of the conventional cell deteriorated after about 3 days and the cell became unusable, but the cell of the example of the present invention did not deteriorate and could be used for a long time.
【００１４】[0014]
【発明の効果】本発明によれば陰極におけるニッケルの
凝集が抑えられる結果、優れた発電性能、耐久性をもっ
た固体電解質型電解セルの陰極が提供される。EFFECTS OF THE INVENTION According to the present invention, as a result of suppressing the agglomeration of nickel in the cathode, a cathode of a solid electrolyte type electrolytic cell having excellent power generation performance and durability is provided.
【図１】本発明によって製造された陰極をもつ固体電解
質型燃料電池電解セルの発電性能を示す図表。FIG. 1 is a chart showing the power generation performance of a solid oxide fuel cell electrolysis cell having a cathode manufactured according to the present invention.
【図２】固体電解質型燃料電池電解セルの概略説明図。FIG. 2 is a schematic explanatory view of a solid oxide fuel cell electrolysis cell.
【図３】従来の固体電解質型燃料電池電解セルの陰極の
劣化の模式的な説明図。FIG. 3 is a schematic explanatory diagram of deterioration of a cathode of a conventional solid oxide fuel cell electrolysis cell.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 宮本 均 兵庫県高砂市荒井町新浜二丁目１番１号 三菱重工業株式会社高砂研究所内 (72)発明者 角 正夫 兵庫県高砂市荒井町新浜二丁目１番１号 三菱重工業株式会社高砂研究所内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hitoshi Miyamoto 2-1-1, Niihama, Arai-cho, Takasago-shi, Hyogo Mitsubishi Heavy Industries Ltd. Takasago Research Institute (72) Masao Kaku 2-1-2, Niihama, Arai-cho, Takasago-shi, Hyogo No. 1 Mitsubishi Heavy Industries Takasago Research Center
Claims (1)
予め混合して仮焼し、該仮焼物を粉砕して溶媒に分散さ
せてなるスラリを固体電解質の片面に塗布焼成すること
を特徴とする固体電解質型電解セルの陰極の製造方法。1. A nickel oxide powder and a solid electrolyte powder are mixed in advance and calcined, and a slurry obtained by pulverizing the calcined product and dispersing it in a solvent is applied to one surface of the solid electrolyte and baked. A method for manufacturing a cathode of a solid electrolyte type electrolytic cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5083304A JPH06295731A (en) | 1993-04-09 | 1993-04-09 | Manufacture of negative electrode for solid electrolyte type electrolytic cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5083304A JPH06295731A (en) | 1993-04-09 | 1993-04-09 | Manufacture of negative electrode for solid electrolyte type electrolytic cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06295731A true JPH06295731A (en) | 1994-10-21 |
Family
ID=13798679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5083304A Withdrawn JPH06295731A (en) | 1993-04-09 | 1993-04-09 | Manufacture of negative electrode for solid electrolyte type electrolytic cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06295731A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007012498A (en) * | 2005-07-01 | 2007-01-18 | Chubu Electric Power Co Inc | Manufacturing method of fuel electrode for solid oxide fuel cell and fuel cell |
| KR100756518B1 (en) * | 2006-03-22 | 2007-09-10 | 고등기술연구원연구조합 | Method of preparing a material for electrolysis |
| JP2014082203A (en) * | 2012-09-28 | 2014-05-08 | Nippon Shokubai Co Ltd | Half cell of solid oxide fuel battery and solid oxide fuel battery cell |
| JP2019029101A (en) * | 2017-07-26 | 2019-02-21 | 住友金属鉱山株式会社 | Method of producing fuel electrode material for solid oxide fuel cell |
-
1993
- 1993-04-09 JP JP5083304A patent/JPH06295731A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007012498A (en) * | 2005-07-01 | 2007-01-18 | Chubu Electric Power Co Inc | Manufacturing method of fuel electrode for solid oxide fuel cell and fuel cell |
| KR100756518B1 (en) * | 2006-03-22 | 2007-09-10 | 고등기술연구원연구조합 | Method of preparing a material for electrolysis |
| JP2014082203A (en) * | 2012-09-28 | 2014-05-08 | Nippon Shokubai Co Ltd | Half cell of solid oxide fuel battery and solid oxide fuel battery cell |
| JP2019029101A (en) * | 2017-07-26 | 2019-02-21 | 住友金属鉱山株式会社 | Method of producing fuel electrode material for solid oxide fuel cell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20000704 |