Ca-doping medium-low-temperature solid oxide fuel battery cathode material

A fuel cell cathode and solid oxide technology, which is applied to solid electrolyte fuel cells, battery electrodes, circuits, etc., can solve the problems of reduced conductivity and electrochemical performance, reduced thermal expansion coefficient, and high thermal expansion coefficient, so as to improve electrical conductivity, Reduced thermal expansion coefficient and excellent performance
CN106450346AInactive Publication Date: 2017-02-22JIANGSU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JIANGSU UNIV
Publication Date
2017-02-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a Ca-doping medium-low-temperature solid oxide fuel battery cathode material, which has the composition general formula of yPrBa1-xCaxCoCuO5+delta-(1-y)M, wherein x is 0.001 to 1.0; delta is 0 to 1.0; y is 10 weight percent to 100 weight percent; M is one or the combination of more than one of Gd0.1Ce0.9O1.95, Gd0.2Ce0.8O1.9, Sm0.1Ce0.9O1.95, Sm0.2Ce0.9O1.9, Y0.16Zr0.92O2.08 and Sc0.2Ce0.01Zr0.89O2.1. The cathode material provided by the invention has the advantages that the Ca is doped into a site A of Pr BaCuCoO5+delta so as to improve the material electric conductivity and the electric chemical performance; meanwhile, the heat expansion coefficient of the material is reduced; the SOFC cathode material with excellent performance can be obtained, so that the cathode material has high oxygen catalytic reduction activity and electric conductivity in the medium-low temperature range; the polarization impedance at 700 DEG C is only 0.014 ohm cm<2>; the maximum output power of the corresponding single battery is as high as 1331 mW cm<-2> at 800 DEG C.
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Description

technical field

[0001] The invention belongs to the field of battery cathode material preparation, and in particular relates to a cathode material suitable for medium and low temperature calcium-doped medium and low temperature solid oxide fuel cells. Background technique

[0002] With the over-exploitation and low-efficiency use of fossil energy, the environment is deteriorating day by day, and these problems seriously restrict the sustainable development of the economy. As a green energy conversion device, solid oxide fuel cell (SOFC) is expected to alleviate the above problems due to its high energy conversion efficiency and wide range of fuel applications. Reducing the operating temperature of SOFC to the medium and low temperature range (500-800°C) and having better thermal matching performance are the keys to realize its commercialization. However, as the operating temperature decreases, the oxygen catalytic reduction activity of conventional cathode materials decreas...

Claims

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