KR20200080828A - Cathode material based in perovskite for solid oxide fuel cell, manufacturing method thereof - Google Patents

Cathode material based in perovskite for solid oxide fuel cell, manufacturing method thereof Download PDF

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KR20200080828A
KR20200080828A KR1020180170717A KR20180170717A KR20200080828A KR 20200080828 A KR20200080828 A KR 20200080828A KR 1020180170717 A KR1020180170717 A KR 1020180170717A KR 20180170717 A KR20180170717 A KR 20180170717A KR 20200080828 A KR20200080828 A KR 20200080828A
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solid oxide
fuel cell
oxide
perovskite
oxide fuel
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KR1020180170717A
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Korean (ko)
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신태호
오미영
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한국세라믹기술원
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    • 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
    • H01M4/9016—Oxides, hydroxides or oxygenated metallic salts
    • H01M4/9025—Oxides specially used in fuel cell operating at high temperature, e.g. SOFC
    • H01M4/9033—Complex oxides, optionally doped, of the type M1MeO3, M1 being an alkaline earth metal or a rare earth, Me being a metal, e.g. perovskites
    • 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
    • H01M4/8647—Inert electrodes with catalytic activity, e.g. for fuel cells consisting of more than one material, e.g. consisting of composites
    • H01M4/8652—Inert electrodes with catalytic activity, e.g. for fuel cells consisting of more than one material, e.g. consisting of composites as mixture
    • 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
    • H01M4/92—Metals of platinum group
    • H01M4/921—Alloys or mixtures with metallic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
    • H01M2008/1293—Fuel cells with solid oxide electrolytes
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Inert Electrodes (AREA)

Abstract

The present invention relates to a perovskite-based cathode material for a solid oxide fuel cell, and a manufacturing method thereof. More specifically, the present invention is to manufacture a solid oxide perovskite-based cathode in which lanthanum strontium cobalt ferrite (La_0.6Sr_0.4Co_0.2Fe_0.8O_3) is doped with palladium (Pd). According to the present invention, it is possible to replace existing solid oxide electrodes and improve the performance.

Description

고체산화물 연료전지용 페로브스카이트 기반 공기극 물질, 이의 제조방법 {Cathode material based in perovskite for solid oxide fuel cell, manufacturing method thereof}Perovskite-based cathode material for solid oxide fuel cell, manufacturing method thereof {Cathode material based in perovskite for solid oxide fuel cell, manufacturing method thereof}

본 발명은 고체 산화물 연료전지용 공기극, 이의 제조방법 및 이를 포함하는 고체 산화물연료전지에 관한 것으로, 구체적으로 란타늄 스트론튬 코발트 페라이트(LSCF)에 팔라듐(Pd)이 도핑된 고체 산화물 연료전지용 공기극에 관한 것이다. The present invention relates to an anode for a solid oxide fuel cell, a method for manufacturing the same, and a solid oxide fuel cell including the same, and more particularly, to a cathode for a solid oxide fuel cell doped with palladium (Pd) in lanthanum strontium cobalt ferrite (LSCF).

본 발명은 페로브스카이트 구조를 가지는 란타늄 스트론튬 코발트 페라이트 산화물에 팔라듐을 도핑하여 환원 공정으로 금속 팔라듐을 도출 하고, 상의 변화를 통해 우수한 촉매능 및 고온 안정성을 바탕으로 산화물 전극을 제조하는 것이다.The present invention is to derive metal palladium by a reduction process by doping palladium on a lanthanum strontium cobalt ferrite oxide having a perovskite structure, and preparing an oxide electrode based on excellent catalytic ability and high temperature stability through phase change.

본 발명은 귀금속을 대체할 수 있는 페로브스카이트 구조를 가지는 팔라듐을 도핑한 란타늄 스트론튬 코발트 페라이트 산화물을 제조하는 것이며 이를 적용한 고체산화물 공기극의 제조방법을 제공하는 것을 목적으로 한다.The present invention is to prepare a lanthanum strontium cobalt ferrite oxide doped with palladium having a perovskite structure capable of replacing a noble metal, and an object of the present invention is to provide a method for manufacturing a solid oxide cathode to which it is applied.

상기 과제를 해결하기 위해, 본 발명은 페로브스카이트 구조를 가지는 산화물La0.6Sr0.4Co0.2Fe0.8O3에 팔라듐이 도핑된 것을 특징으로 하는 고체 산화물 연료전지용 공기극을 제공한다. In order to solve the above problems, the present invention provides a cathode for a solid oxide fuel cell, characterized in that palladium is doped with oxide La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 having a perovskite structure.

본 발명에 따른 고체 산화물 연료전지용 공기극은 란타늄, 스트론튬, 코발트 및 페라이트로 이루어진 페로브스카이트(perovskite)형 구조의 금속 산화물에 팔라듐이 도핑되어 이온 및 전기 전도체가 혼합된 형태여서 고체 산화물 연료전지 공기극 표면 전체가 반응 사이트로 이용되므로, 성능을 향상시킬 수 있다.The cathode for a solid oxide fuel cell according to the present invention is a palladium-doped metal oxide of a perovskite type structure made of lanthanum, strontium, cobalt, and ferrite, and is a mixture of ionic and electrical conductors, so that the cathode of the solid oxide fuel cell Since the entire surface is used as a reaction site, performance can be improved.

도 1은 본 발명에 따른 고체산화물 연료전지용 공기극의 제조방법을 나타낸 순서도이다.
도 2는 본 발명에 따라 제조된 공기극 분말의 X선 회절(X-ray diffraction, XRD) 측정 결과를 예시적으로 나타내는 그래프이다.1 is a flow chart showing a method of manufacturing a cathode for a solid oxide fuel cell according to the present invention.
FIG. 2 is a graph exemplarily showing the results of X-ray diffraction (XRD) measurement of the cathode powder prepared according to the present invention.

이하 본 발명에 대하여 구체적인 내용을 상세히 설명하기로 한다. 팔라듐이 도핑된 La0.6Sr0.4Co0.2Fe0.8O3의 페로브스카이트를 제조하기 위해 산화물 및 나이트레이트를 출발물질로 하여 증류수, 에탄올 및 아세톤에 혼합 후 용액을 증발시키고, 이렇게 얻어진 분말을 400도에서 열처리 하여 나이트레이트 등 불순물을 제거한다. 이후 분쇄를 거친후, 1200℃에서 5시간 열처리 후 재분쇄 공정을 거쳐 분말을 만든다. 이렇게 만들어진 분말은 700 ~ 800℃에서 2시간 이상 환원분위기에서 열처리하여 최종 분말을 얻는다.Hereinafter, the present invention will be described in detail. To prepare a perovskite of La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 doped with palladium, mixed with distilled water, ethanol and acetone using oxide and nitrate as starting materials, the solution was evaporated, and the powder thus obtained was 400. Heat treatment is performed to remove impurities such as nitrate. After the pulverization, the powder is made by heat treatment at 1200° C. for 5 hours and then re-grinding. The powder thus produced is heat-treated in a reducing atmosphere at 700 to 800°C for 2 hours or more to obtain a final powder.

Claims (6)

하기 화학식 1의 화합물을 포함하는 고체산화물 연료전지용 공기극 소재

[화학식 1]
La0.6Sr0.4Co0.2Fe0.8O3 + Pd
A cathode material for a solid oxide fuel cell comprising the compound of Formula 1

[Formula 1]
La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 + Pd
제 1항에 있어서 상기 산화물은 출발물질로 La(NO3)3 6H2O, Sr(NO3)2, Co(NO3)2 6H2O, Fe(NO3)3 9H2O, Pd acetate 등을 포함하는 것이 특징인 신화물
According to claim 1, The oxide is La (NO 3 ) 3 6H 2 O, Sr(NO 3 ) 2 , Co(NO 3 ) 2 6H 2 O, Fe(NO 3 ) 3 9H 2 O, Pd acetate New cargo characterized by including a back
제 1항에 있어서 상기 팔라듐은 상기 금속 산화물의 0.05 mol %로 포함되는 것을 특징으로 하는 고체 산화물 연료전지용 공기극
The cathode for a solid oxide fuel cell according to claim 1, wherein the palladium is contained in 0.05 mol% of the metal oxide.
제 2항에 있어서 증류수, 아세톤 및 에탄올에 혼합 후 가열하여 용액을 증발시키고, 1200℃에서 5시간 하소하는 것이 특징인 산화물
The oxide according to claim 2, wherein the solution is evaporated by mixing with distilled water, acetone, and ethanol and heated to calcinate at 1200° C. for 5 hours.
제 4항에 있어서 하소한 분말은 분쇄과정을 거쳐 700 ~ 800℃의 환원분위기에서 2시간 이상 열처리 하는 것이 특징인 산화물
The oxide according to claim 4, wherein the calcined powder is subjected to a crushing process and heat-treated for 2 hours or more in a reducing atmosphere of 700 to 800°C.
제 6항에 있어서 상기 산화물은 일정한 단일상과 환원공정을 통하여 금속 팔라듐이도출되과 상의 변화를 통해 기존 산화물보다 우수한 촉매특성을 갖는 것을 특징으로 하는 산화물
7. The oxide of claim 6, wherein the oxide has superior catalytic properties than a conventional oxide through a change in phase through which metal palladium is introduced through a single phase and a reduction process.
KR1020180170717A 2018-12-27 2018-12-27 Cathode material based in perovskite for solid oxide fuel cell, manufacturing method thereof KR20200080828A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114054032A (en) * 2021-11-23 2022-02-18 东莞理工学院 Preparation method and application of strontium perovskite catalytic cathode

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114054032A (en) * 2021-11-23 2022-02-18 东莞理工学院 Preparation method and application of strontium perovskite catalytic cathode
CN114054032B (en) * 2021-11-23 2023-11-07 东莞理工学院 Preparation method and application of strontium perovskite catalytic cathode

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