Preparation method of cathode barrier layer of metallic-propping solid oxide fuel cell

Abstract

The invention discloses a preparation method of a cathode barrier layer of a metallic-propping solid oxide fuel cell. The preparation method comprises the following steps: adding cathode barrier layer material powder into an ethylene cellulose terpilenol solution proportionally and grinding to obtain paste; depositing the paste on a thick porous metal propping layer film / thin porous metal ceramic gradient transition layer film / thin porous anode layer film / thin compact electrolyte layer film half cell in a silk-screen printing manner; sintering for 2-4h at 1000-1200 DEG C in a vacuum atmosphere, controlling the temperature rise and temperature reduction rate to 0.5-5 DEG C / min, and cooling to room temperature to obtain a product. The cathode barrier layer is sintered at high temperature in a low vacuum atmosphere, so that a supporting body is prevented from being oxidized excessively, the film dropping caused by cerium valence reduction in a cerium-oxide-based electrolyte barrier layer in a reducing atmosphere is avoided, and the volatile loss of Ga in LaGaO3-based electrolyte barrier layer is also avoided, and therefore, a high-performance cathode material can be effectively prevented from reacting with zirconium-oxide-based solid electrolyte under a preparation condition.

Description

technical field [0001] The invention relates to the technical field of fuel cell materials, in particular to a method for preparing a metal-supported solid oxide fuel cell cathode barrier layer. Background technique [0002] Solid Oxide Fuel Cell (Solid Oxide Fuel Cell, SOFC) is an all-solid-state power generation device that directly converts the chemical energy in the fuel into electrical energy through an electrochemical reaction. The conversion process has many advantages, among which the outstanding advantage is the wide applicability of fuel, that is, hydrogen, carbon monoxide and hydrocarbons can be used as fuel, so hydrogen, carbon monoxide, natural gas, liquefied petroleum gas, coal gas, biomass can be widely used Various hydrocarbon fuels such as gas, methanol and ethanol. Solid oxide fuel cells have a wide range of applications, and their main applications include distributed power stations, household power stations, vehicle auxiliary power supplies, uninterrupti...

AI Technical Summary

Problems solved by technology

The interlayer is prepared at a relatively low temperature by radio frequency magnetron reactive sputtering, which avoids the reaction with the zirconia-based electrolyte to form a cerium-zirconium oxide solid solution, but the sputtered dense layer needs to be between 400 and 1000°C Annealing treatment, the metal support will be oxidized in this temperature range, resulting in degradation of battery performance; at the same time, the cost of preparing thin films by radio frequency magnetron reactive sputtering is relatively high