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Solid oxide electrolytic cell working electrode modified by binary alloy nano-particles as well as preparation method and application of solid oxide electrolytic cell working electrode

A solid oxide, working electrode technology, applied in electrodes, electrolysis components, electrolysis process, etc., can solve the problems of agglomeration, complex preparation process, large size of nanoparticles, etc., and achieve the effect of uniform distribution, simple process, and not easy to agglomerate

Pending Publication Date: 2022-06-24
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the nanoparticles obtained by common methods such as physical mixing, impregnation, coating, and vapor deposition have disadvantages such as large size, agglomeration, and complicated preparation process.

Method used

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  • Solid oxide electrolytic cell working electrode modified by binary alloy nano-particles as well as preparation method and application of solid oxide electrolytic cell working electrode
  • Solid oxide electrolytic cell working electrode modified by binary alloy nano-particles as well as preparation method and application of solid oxide electrolytic cell working electrode
  • Solid oxide electrolytic cell working electrode modified by binary alloy nano-particles as well as preparation method and application of solid oxide electrolytic cell working electrode

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Weigh lanthanum oxide, strontium carbonate, iron oxide, and nickel oxide, whose masses are 2.5867g, 4.7589g, 3.2657g and 0.5391g, respectively, and mix them by ball milling at a speed of 400r / min, then place them in a high-temperature furnace and sinter at a high temperature of 1200°C. Preparation of perovskite-based matrix La in 7h 0.33 Sr 0.67 Fe 0.85 Ni 0.15 O 3-δ (LSFN);

[0039] (2) Place the synthesized LSFN powder in a flowing 10% H 2 The FeNi@LSF electrode powder modified by binary alloy nanoparticles was obtained by reduction at 850 °C in a mixed atmosphere of / Ar.

Embodiment 2

[0046] (1) Weigh lanthanum oxide, strontium carbonate, iron oxide, and nickel oxide, whose masses are 2.5867g, 4.7589g, 3.2657g and 0.5391g, respectively, and mix them by ball milling at a speed of 400r / min, then place them in a high-temperature furnace and sinter at a high temperature of 1200°C. Preparation of perovskite-based matrix La in 7h 0.33 Sr 0.67 Fe 0.85 Ni 0.15 O 3-δ (LSFN);

[0047] (2) The mass ratio of synthesized LSFN powder to electrolyte powder (GDC), pore-forming agent (PMMA), and binder (ethyl cellulose, turpentine permeate) is 5:5:0.75:1:14.25, and The composite electrode slurry LSFN-GDC was prepared by ball milling at 400 r / min.

[0048] (3) The prepared composite electrode paste LSFN-GDC was coated on an area of ​​1.766 cm by screen printing. 2 The two sides of the electrolyte GDC were coated with nine layers in total; after drying at 60°C, after sintering at 1000°C for 2 hours, platinum paste was applied to the electrode surfaces on both sides of t...

Embodiment 3

[0060] (1) Weigh lanthanum oxide, strontium carbonate, iron oxide, and nickel oxide, whose masses are 2.5867g, 4.7589g, 3.2657g and 0.5391g, respectively, and mix them by ball milling at a speed of 400r / min, then place them in a high-temperature furnace and sinter at a high temperature of 1200°C. Preparation of perovskite-based matrix La in 7h 0.33 Sr 0.67 Fe 0.85 Ni 0.15 O 3-δ (LSFN);

[0061](2) The mass ratio of synthesized LSFN powder to electrolyte powder (GDC), pore-forming agent (PMMA), and binder (ethyl cellulose, turpentine permeate) is 5:5:0.75:1:14.25, and The composite electrode slurry LSFN-GDC was prepared by ball milling at 400 r / min.

[0062] (3) The prepared composite electrode paste LSFN-GDC was coated on one side of the electrolyte GDC with an area of ​​1.766 cm2 by screen printing method, and a total of nine layers were coated; the other side of the electrolyte was coated with BCFN-GDC Composite electrode; after drying at 60 °C and sintering at 1000 °C...

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Abstract

The invention discloses a binary alloy nanoparticle modified solid oxide electrolytic cell working electrode as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, taking oxides and carbonates of metal elements as raw materials, or directly taking perovskite oxides and pre-doped compounds as raw materials; after ball-milling and mixing, calcining at 1000-1200 DEG C, and performing high-temperature solid-phase synthesis to obtain a binary metal doped perovskite oxide; s2, preparing working electrode slurry from the binary metal doped perovskite oxide; and S3, coating an electrolyte sheet with the working electrode slurry, drying and sintering to prepare the working electrode of the solid oxide electrolytic cell, and S4, introducing a reducing atmosphere, and carrying out high-temperature treatment. The binary metal nanoparticles on the surface of the obtained electrode increase the active sites of electrochemical reaction, which is beneficial to the proceeding of the electrode reaction; the dissolution of the B-site element is beneficial to the oxygen reduction reaction on the surface of the electrode, and the oxygen ion conductivity of the electrode is improved.

Description

technical field [0001] The invention belongs to the field of solid oxide electrolytic cells, and relates to a solid oxide electrolytic cell working electrode modified by binary alloy nanoparticles and a preparation method thereof. Background technique [0002] Solid oxide electrolysis cell (SOEC) is an advanced electrochemical energy conversion device, which can utilize the electric and thermal energy generated by clean primary energy for efficient electrolysis to produce hydrogen or hydrocarbon fuel, electrochemical synthesis of ammonia and other fields. [0003] At present, the working temperature of SOEC is 800-1000 ℃. The higher working temperature increases the difficulty of packaging the battery and reduces the service life of the battery. The development of SOEC working at medium and low temperature (400-800 ℃) has always been one of the important directions of research. . The working electrode of SOEC is the place where the electrochemical reaction occurs, which has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/27C25B11/054C25B11/089
CPCC25B1/27C25B11/054C25B11/089
Inventor 李榕李天真甄强
Owner SHANGHAI UNIV
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