Method for preparing metallic support type solid oxide fuel cell

Abstract

The invention provides a method for preparing a metallic support type solid oxide fuel cell, and belongs to a method for preparing a solid oxide fuel cell (SOFC). The invention aims to simplify process, lower cost and prepare the fuel cell with excellent electric property. The method comprises the following steps: (1) a tape casting slurry preparation step; (2) a tape casting formation step; (3) a half cell preparation step; (4) a high-temperature sintering step; (5) a monocell preparation step; and (6) a reducing step. The method has the advantages of wide raw material source, simple preparation process and low cost; and the open-circuit voltage of the prepared SOFC, which is measured at a temperature of 750 DEG C, is 1.01V, the maximum power density is 0.64w / cm, so that the SOFC can be applied to the preparation of the large-area metallic support type solid oxide fuel cell.

Description

technical field [0001] The invention belongs to a preparation method of a solid oxide fuel cell (SOFC), in particular to a preparation method of a metal-supported solid oxide fuel cell. Background technique [0002] According to different types of supports, traditional solid oxide fuel cells (SOFCs) can be divided into electrolyte-supported solid oxide fuel cells, anode-supported solid oxide fuel cells, and cathode-supported solid oxide fuel cells. In various types of supported solid oxide fuel cells, the support material belongs to ceramic material or metal-ceramic composite material. Because ceramic materials are not easy to process, and have poor thermal shock resistance and weldability, it is more difficult for the single cell to be assembled in the stack, and it is easy to break. [0003] The development of electrolyte thin film and low-temperature new electrolyte materials has effectively reduced the operating temperature of solid oxide fuel cells (600-800 ° C), there...

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Problems solved by technology

According to the molding method of the electrolyte, the preparation of metal-supported solid oxide fuel cells is mainly divided into two categories: one is the preparation method of low-temperature molding, such as pulsed laser deposition, chemical vapor deposition, suspension plasma spraying, etc., and the prepared electrolyte is relatively dense, and the sintering temperature is low, which can effectively inhibit the oxidation of metals, but such methods require high equipment and complicated processes, resulting in high preparation costs; see Shiqiang Hui, Dongfang Yang, Zhenwei Wang, et al."Metal- supported solid oxide fuel cell operated at 400-600℃" (Journal of Power Sources, 2007, 167: 336-339)

The other is the method of high-temperature co-firing in a reducing atmosphere. Although the high-temperature co-firing in a reducing atmosphere can simplify the molding process and use the wet ceramic molding process to prepare electrolytes to reduce production costs, but in a reducing atmosphere High-temperature co-firing can easily cause interdiffusion of metal elements between the metal support and the anode functional layer, thereby reducing battery performance; The performance of the battery is greatly reduced, and the diffusion of metal elements in the anode layer such as Ni into the Fe-Cr support will cause changes in the thermal expansion coefficient of the support, resulting in cracking of the electrolyte layer; see Michael C.Tucker, Grace Y.Lau, C P. Jacobson. "Performance of metal-supported SOFCs with infiltrated electrodes" (Journal of power sources, 2007, 171: 477-482)

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