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A cathode material, preparation method and application of solid oxide fuel cell with abundant a-site

A fuel cell cathode and solid oxide technology, which is applied in solid electrolyte fuel cells, battery electrodes, chemical instruments and methods, etc., can solve the problems of electrode polarization impedance increasing cathode polarization impedance and reducing electrochemical performance.

Active Publication Date: 2019-07-09
上海翌晶氢能科技有限公司
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Problems solved by technology

However, as the working temperature drops to medium and low temperature, the polarization impedance of the electrode, especially the cathode polarization impedance, increases sharply, resulting in a decrease in electrochemical performance. Therefore, it is urgent to develop cathode materials with high electrical performance for medium and low temperature solid oxide fuels. Battery

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  • A cathode material, preparation method and application of solid oxide fuel cell with abundant a-site
  • A cathode material, preparation method and application of solid oxide fuel cell with abundant a-site
  • A cathode material, preparation method and application of solid oxide fuel cell with abundant a-site

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Embodiment 1

[0062] This embodiment provides a kind of cathode material Pr of above-mentioned medium and low temperature solid oxide fuel cell 1.05 BaCo 2 o 6-δ The preparation method, the specific steps are as follows: Weigh 5.7096 g of praseodymium nitrate, 3.2668 g of barium nitrate, 7.2758 g of cobalt nitrate, add a small amount of deionized water to dissolve. Weigh 15 g of ethylenediamine tetraacetic acid and 21 g of citric acid hydrate as a complexing agent and dissolve them in deionized water at a molar ratio of ethylenediaminetetraacetic acid: citric acid hydrate: total metal ions of 1:2:1. After adding the complexing agent-dissolved solution to the metal ion-dissolved solution, an appropriate amount of ammonia water is added dropwise to bring the pH of the solution to 7, and then the water is completely evaporated under magnetic stirring conditions to obtain a gel-like substance. The gel-like substance was calcined in an oven at 250 °C for 5 h to obtain the desired foamy precurs...

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Abstract

The invention relates to an A-bit Pr-surplus solid oxide fuel cell cathode material and a preparation method thereof. The composition molecular formula of the cathode material is Pr1+xBaCo2O6-delta, wherein x represents Pr-surplus amount, x is greater than or equal to 0 and less than or equal to 0.1, and delta represents the content of oxygen vacancy; the invention belongs to the technical field of solid oxide fuel cell cathode materials. The electrochemical performance of PrBaCo2O6-delta is improved by means of A-bit Pr surplus in the perovskite material PrBaCo2O6-delta. The electrical conductivity, oxygen diffusion capacity and oxygen exchange capacity of the A-bit Pr-surplus Pr1+xBaCo2O6-delta material are improved to a certain extent, the polarization resistance at the temperature of 600 DEG C is only 0.046 omega cm <2>, and the maximum power output of a corresponding single cell at the temperature of 650 DEG C reaches up to 1503mW.cm<-2>. The A-bit Pr-surplus solid oxide fuel cellcathode material can obviously reduce the polarization resistance of a PrBaCo2O6-delta cathode, thus contributing to the industrial application of medium and low temperature solid oxide fuel cells.

Description

technical field [0001] The invention relates to a solid oxide fuel cell cathode material and its preparation method and application, in particular to a solid oxide fuel cell cathode material Pr with A-site Pr surplus 1+x BaCo 2 o 6-δ And its preparation method and application. Background technique [0002] Solid oxide fuel cell is a new type of energy conversion device that can directly convert chemical energy into electrical energy. A high-efficiency alternative energy source for energy saving, emission reduction and sustainable development. The operating temperature of traditional solid oxide fuel cells is 800-1000°C. High temperature operating conditions limit the development of solid oxide fuel cells in terms of stability and cost, seriously hindering their large-scale commercial development. For example, the interface reaction between the cathode and the electrolyte occurs under high temperature conditions; the difference in thermal expansion of the electrolyte, ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G51/00H01M4/90H01M8/12
CPCY02E60/50
Inventor 周嵬胡业杨广明晏阳周浏生邵宗平
Owner 上海翌晶氢能科技有限公司
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