Metal-supported solid oxide fuel cell and preparation method thereof

Abstract

The invention provides a metal-supported solid oxide fuel cell and a preparation method thereof. The preparation method roughly comprises the following steps: providing a porous metal substrate, and providing an anode diaphragm, an electrolyte diaphragm and a barrier layer, wherein a material forming the barrier layer comprises cooked porcelain powder, and the cooked porcelain powder is obtained by heating powder of an electrolyte material at the temperature of 1000-1400 DEG C until the powder is cured; and laminating the porous metal substrate, the anode membrane, the electrolyte membrane and the barrier layer by layer to obtain a laminated half-cell, degumming and sintering the laminated half-cell to obtain a half-cell sintered body, and finally providing a cathode membrane on the half-cell sintered body, and carrying out cathode sintering to obtain the metal-supported solid oxide fuel cell. 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 metal-supported solid oxide fuel cell and a preparation method thereof. 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 cells mainly...

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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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