Cathode material for medium temperature solid oxide fuel battery, and preparation thereof

Abstract

The invention relates to a cathode material for a medium temperature solid oxide fuel battery, wherein the cathode material is a lanthanum ferrite base cathode material, and has a chemical formula of La1-xSrxFe1-yCuyO3-delta(LSFC), x is more than or equal to 0.1 and is less than or equal to 0.4, y is more than or equal to 0.1 and is less than or equal to 0.3. The preparation method comprises: carrying out a pretreatment on lanthanum oxide, strontium carbonate, iron oxide and copper oxide; weighing the raw materials according to a stoichiometric ratio of LSFC, and carrying out complete mixing grinding and sectional pre-burning; and completely grinding the pre-burned powder material, adding polyvinyl alcohol to carrying out pressing molding, switching the molded sample between two ceramic plates, and placing in a microwave sintering furnace to sinter. The lanthanum ferrite base cathode material does not contain precious elements, has high electric conductivity and a low thermal expansion coefficient, has characteristics of good thermal matching property and chemical compatibility compared with the commonly used electrolyte, and has characteristics of low sintering temperature, short sintering time, and low energy consumption compared to the conventional solid phase sintering.

Description

technical field [0001] The invention belongs to the technical field of chemical power source solid oxide fuel cell (SOFC), in particular to a cathode material for a medium-temperature solid oxide fuel cell and its preparation. Background technique [0002] Resources, energy and the environment are the basis for human survival and development. With the rapid development of human civilization, over-exploitation and low-efficiency use of fossil energy have led to global energy shortages and serious environmental pollution problems. Before the successful development of clean alternative energy sources, more rational and efficient use of existing energy resources is of great significance to the healthy and sustainable development of human society. Therefore, efficient and clean energy conversion technology has attracted great attention at home and abroad in recent years. [0003] Solid Oxide Fuel Cell (Solid Oxide Fuel Cell referred to as SOFC) is an all-solid-state power gener...

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Problems solved by technology

[0006] The cathode material of intermediate temperature solid oxide fuel cells is often prepared by the traditional solid-state method. The heating method is to rely on the heating element to transfer heat energy to the object to be heated by convection, conduction or radiation to reach a certain temperature. The heat is from the outside Internal transfer, not only high sintering temperature, long time consumption, high energy consumption, but also poor homogeneity of the obtained materials, etc.

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