Preparation method of metal-supported solid oxide fuel cell, and fuel cell

Abstract

The invention provides a preparation method of a metal-supported solid oxide fuel cell, and the fuel cell. The preparation method provided by the invention mainly comprises the following steps: providing a porous metal substrate, an anode membrane, an electrolyte membrane and a barrier layer; and laminating a porous metal substrate, an anode diaphragm, an electrolyte diaphragm and a barrier layer layer by layer to obtain a laminated half-cell, then carrying out glue discharging and sintering on the laminated half-cell to obtain a half-cell sintered body, providing a cathode diaphragm for the half-cell sintered body, and carrying out cathode sintering, wherein the sintering is carried out at the temperature of 850-1000 DEG C, the sintering time is 1 ~ 4 hours, and the laminated half cell is continuously subjected to the pressure of 500 N ~ 50 KN in the vertical direction in the sintering process. According to the method provided by the invention, sintering can be carried out at a relatively low temperature, and the shrinkage of the electrolyte membrane in the sintering process is concentrated in the Z direction, so that the densification of the electrolyte membrane is promoted.

Description

technical field [0001] The invention belongs to the field of fuel cells, and in particular relates to a method for preparing a metal-supported solid oxide fuel cell and the fuel cell. Background technique [0002] Solid Oxide Fuel Cell (Solid Oxide Fuel Cell, referred to as SOFC) belongs to the third-generation fuel cell, which is an all-solid-state device that directly converts the chemical energy stored in fuel and oxidant into electrical energy in an efficient and environmentally friendly manner at medium and high temperatures. Chemical power generation devices, and metal-supported solid oxide fuel cells (MS-SOFC) can improve the mechanical strength of single cells, increase the thermal shock resistance of batteries, and reduce the cost of SOFC systems. Therefore, in recent years, metal-supported solid oxide fuel cells have gradually become fuel cells. new research hotspots in the field. [0003] At present, the methods for preparing metal-supported solid oxide fuel cell...

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Problems solved by technology

Among them, vapor deposition methods such as PVD / CVD can obtain dense electrolyte films, and the thickness can be controlled below 1 μm, but this method is expensive in equipment and low in efficiency, and cannot achieve large-scale commercial production; although thermal spraying methods such as plasma spraying can Large-scale and rapid production can be achieved, but it is impossible to prepare thin films below 10 μm, and high-temperature spraying leads to the formation of holes in the electrolyte, which is not dense and requires complicated post-processing; and high-temperature sintering method has high energy consumption and cost, and the film will be in the sintering process. Shrinkage occurs in the plane direction, and deformation and warping are prone to occur. The sintering temperature exceeding 1400°C may also cause the metal support to reach the melting point and make the pores of the support body closed, and the high-temperature sintering method needs to be carried out in a reducing atmosphere, which has a large potential safety hazard

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