Production process and half cell of a solid oxide fuel cell half cell

Abstract

The invention discloses a production process of a solid oxide fuel cell half cell, comprising the following steps: S1: preparing anode functional layer slurry and anode slurry; S2: applying the anode functional layer slurry on the surface of the carrier tape, and drying to obtain a Anode functional layer; S3: apply anode slurry on the surface of the anode functional layer, remove the carrier tape after drying, to obtain a green anode substrate; S4: sinter the green anode substrate for the first time to obtain an anode substrate; S5 : prepare an electrolyte film on the surface of the anode functional layer of the anode substrate; S6: sinter the anode substrate with the electrolyte film for the second time to obtain a solid oxide fuel cell half cell; the temperature of the second sintering is higher than that of the first sintering The sintering temperature is 25~150℃ higher. In the solid oxide fuel cell half-cell, through the processes of first sintering and second sintering, the shrinkage rates of the anode substrate and the electrolyte film are matched, and the flatness is improved. The invention also discloses a solid oxide fuel cell half cell.

Description

technical field [0001] The invention relates to the technical field of solid oxide fuel cells, in particular to a production process of a solid oxide fuel cell half cell and the half cell. Background technique [0002] Solid oxide fuel cell (SOFC) is a device that directly converts the chemical energy of fuel into electrical energy at high temperature (600-1000°C). SOFC has the following outstanding advantages: high energy conversion efficiency; wide range of fuel adaptation; no need to use precious metals as catalysts, low cost; all-solid structure, which improves the safety factor of the system and enhances the stability of operation; low greenhouse gas emissions; wide range. Therefore, it has received more and more attention. [0003] Among the preparation methods of SOFC cells, the casting method and the spray method are commonly used thin film preparation methods. SOFC single cells prepared by casting method and spray method often have the problem of poor flatness of...

AI Technical Summary

Problems solved by technology

SOFC single cells prepared by tape casting and spraying methods often have the problem of poor flatness of the sintered sample when firing the single cells. Fragmentation and other problems hinder the large-scale application of solid fuel cells

The tape casting method is suitable for the preparation of large-area thin-layer flat ceramic materials, and is suitable for the preparation of multi-layer composite structural materials. It is often used to prepare SOFC anode substrates and anode functional layers, but it is difficult to prepare dense electrolytes of 20 μm or less by traditional casting methods film

The spray method is suitable for preparing thin films below 20 μm. Usually, metal salts are required to be mixed in proportion as precursors. After spraying, high-temperature sintering is used to make the precursors react to obtain ceramic films. Defects such as cracking, delamination, and peeling

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