Method for producing flat-plate-type solid oxide fuel cell anode support electrolyte composite membrane

Abstract

The invention discloses a method for producing a flat-plate-type solid oxide fuel cell anode support electrolyte composite membrane, and the method is as follows: first, preparing each slurry material for respective preparation of an electrolyte layer, an anode active layer and / or an anode support layer, and an electrolyte slurry material for silk-screen printing; then respectively casting the electrolyte layer, the anode active layer and / or the anode support layer; then using the electrolyte slurry material for silk-screen printing of the surface of the anode support layer of a casted membrane; and finally co-sintering a dried biscuit. The preparation method provided by the invention is low in cost, strong in operability, simple in process, and suitable for mass production, the prepared composite membrane is good in flatness, a cell prepared by use of the composite membrane is high in performance, low in interface impedance, and long in cell life, and has practical value and application prospect. All functional layers are combined closely.

Description

technical field [0001] The invention relates to a method for preparing an anode-supported electrolyte composite membrane of a flat solid oxide fuel cell, belonging to the technical field of solid fuel cells. Background technique [0002] Solid oxide fuel cell (SOFC) is an electrochemical device that directly converts the chemical energy of hydrogen, natural gas and biomass gas fuel into electrical energy. It has the advantages of rich fuel, high efficiency, no pollution, no noise, combined heat and power, Environmentally friendly, safe and reliable, and other outstanding features, it can be widely used in high-quality civilian power supplies such as large power stations, distributed power stations, automotive auxiliary power supplies, and household combined heat and power systems, as well as military power supplies. Therefore, the development of SOFC is of great strategic significance to promote efficient and clean energy utilization and energy diversification. [0003] The...

AI Technical Summary

Problems solved by technology

However, due to the differences in the components and thermal expansion coefficients of the functional layers of the composite film, after co-sintering, the film usually has obvious warping or deformation and becomes uneven.

The uneven composite diaphragm will cause a series of problems: affect the preparation of the cathode; the diaphragm will be stressed during stacking, and the reliability of the diaphragm will be seriously reduced; the airflow distribution will be affected, and the current collection will become difficult, etc.

Chinese patent ZL200910304358 aims at the problem of membrane unevenness caused by co-sintering, and provides a kind of SOFC anode-supported electrolyte composite membrane prepared by first sintering the anode and other supporting layers or intermediate layers separately, then depositing the electrolyte layer by screen printing, and then sintering method; although this method solves the unevenness problem caused by co-sintering, each layer structure in the SOFC composite membrane needs to be sintered once or more times, and the preparation process is complex, with many steps and poor controllability, which is not suitable for industrialization. mass production

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