Mid-temperature solid oxide fuel battery complex cathode material and method of preparing battery cathode

Abstract

A preparation process of intermediate temperature solid oxide fuel cell composite cathode material and cell cathode, relates to a preparation method of solid oxide fuel cell composite cathode material and cell cathode. The invention solves the problems that it has already been unsuitable for the cathode materials for high temperature fuel cell to work at middle temperature now and also the problems of the high production cost of adding noble metal Pt or Pd into electrode materials and also the oxides of sliver doped oxide composite electrode are all with perovskite structures. The general formula of composition of cell composite cathode material is La2-XSrXNiO4-Ag. The preparations of cell cathode are: first, prepare La2-XSrXNiO4, then prepare La2-XSrXNiO4 and electrolyte cathode assemblies, then drop AgNO3 for sintering and will obtain intermediate temperature solid oxide fuel cell composite cathode. The La2-XSrXNiO4 of intermediate temperature solid oxide fuel cell composite cathode materials in the invention is the K2NiF4 type oxides and the cell composite cathode material has holey microstructure, thereby improving the diffusion effect of gas and bringing down the production cost remarkably.

Description

technical field [0001] The invention relates to a composite cathode material of a solid oxide fuel cell and a method for preparing the cathode of the battery. Background technique [0002] As a new type of energy conversion device, solid oxide fuel cell is attracting more and more attention from various countries because of its advantages of high efficiency and cleanliness. Since the electrode activity decreases rapidly with the decrease of the reaction temperature and the polarization resistance increases, the traditional high-temperature fuel cell cathode material-strontium-doped lanthanum manganate (LSM) is no longer suitable for medium temperature (600-800°C) conditions. work, and cannot be used as a cathode material for intermediate temperature solid oxide fuel cells. [0003] The composite electrode made of adding noble metals to the electrode material can improve the catalytic activity of the electrode or increase the three-phase interface of the electrode-electrolyt...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the current high-temperature fuel cell cathode material is not suitable for working under medium temperature conditions, the production cost of adding Pt or Pd noble metal to the electrode material is too high, and the oxides in the current silver-doped oxide composite electrode are all The problem of the perovskite structure, and the preparation method of the intermediate temperature solid oxide fuel cell composite cathode material and the battery cathode

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