Preparation method of active (Mn, Re, Co)3O4 spinel mixed electrode materials and application thereof in HEMAA

Abstract

The invention discloses a preparation method of active (Mn, Re, Co)3O4 spinel mixed electrode materials, and the preparation method is characterized by comprising the following steps: (1) dissolving soluble salts of Mn, Co and rare earth elements, and a complexing agent in distilled water, and uniformly stirring the obtained mixture at room temperature; (2) carrying out low-temperature drying on a solution obtained in the step (1) for 1-200 hours at a temperature of 60-200 DEG C, and carrying out intermediate-temperate calcinating on the obtained object for 2-48 hours at a temperature of 350-500 DEG C so as to remove organic matters, and in a reducing atmosphere, calcining the obtained product for 1-24 hours in a high-temperature atmosphere furnace at a temperature of 600-900 DEG C so as to obtain superfine active mixed powder with the particle size of 10-1000 nm; (3) placing the superfine MnO, Co and Re2O3 active mixed powder obtained in the step (2) into a die, and in a vacuum or protective atmosphere, carrying out sinter molding on the obtained product at a high temperature of 900-1400 DEG C and at a pressure of 20-60 Mpa. The obtained electrode has good room-temperature toughness and electrical conductivity.

Description

technical field [0001] The invention relates to the field of solid oxide fuel cells and high-energy micro-arc electrodeposition technology, more specifically, relates to an active (Mn, Re, Co) with room temperature toughness and conductivity 3 o 4 Preparation method of spinel mixed electrode (Re represents rare earth elements La, Y, Dy). Background technique [0002] Among the various fuel cells as efficient and clean energy sources, Solid Oxide Fuel Cell (Solid Oxide Fuel Cell) is a new type of power generation device, which is a kind of operating temperature between 650-1000 ° C, which can be reduced by a variety of fuels. A power generation device that uses pure oxygen or oxygen in the air as an oxidant to directly convert chemical energy into electrical energy through electrode reactions. Its high operating temperature makes its thermoelectric comprehensive efficiency very high, and it can realize the internal combustion of hydrocarbons used as fuel. Reforming, which d...

AI Technical Summary

Problems solved by technology

For example, spinel coating is prepared by electrodeposition, the preparation process is limited by the surface shape of the workpiece, such as the groove-like structure of the connector, and this method is expensive and difficult to obtain a thicker coating

Plasma spraying is suitable for preparing coatings with complex composition and large thickness, but there are also disadvantages such as non-dense coating, high porosity, easy peeling off when subjected to thermal cycles, and high cost.

Sol-gel method and slurry method are economical and practical, but problems such as coating compactness, coating / metal interface bonding, coating thickness and cracking are difficult to solve