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Solid oxide fuel cell composite cathode Ln2CuO4-Ce0.9Gd0.1O1.95 and preparation method thereof

A technology of ln2cuo4-ce0.9gd0.1o1.95, ce0.9gd0.1o1.95, which is applied in the field of battery composite cathode materials and its preparation, can solve the problems of poor catalytic activity and electrochemical performance, and achieves improved catalytic activity and Electrochemical performance, effect of increasing mixed conductivity, increasing active area

Inactive Publication Date: 2013-06-12
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention is to solve the problem of poor catalytic activity and electrochemical performance of the cathode material, and provide a solid oxide fuel cell composite cathode Ln 2 CuO 4 -Ce 0.9 Gd 0.1 o 1.95 and its preparation method

Method used

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  • Solid oxide fuel cell composite cathode Ln2CuO4-Ce0.9Gd0.1O1.95 and preparation method thereof
  • Solid oxide fuel cell composite cathode Ln2CuO4-Ce0.9Gd0.1O1.95 and preparation method thereof
  • Solid oxide fuel cell composite cathode Ln2CuO4-Ce0.9Gd0.1O1.95 and preparation method thereof

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specific Embodiment approach 1

[0017] Specific implementation mode 1: The composite cathode Ln of the solid oxide fuel cell in this implementation mode 2 CuO 4 -Ce 0.9 Gd 0.1 o 1.95 By weight percentage from 50% to 90% of Ln 2 CuO 4 and 10% to 50% solid electrolyte Ce 0.9 Gd 0.1 o 1.95 Made, where Ln is Pr, Nd, Sm or Eu element.

specific Embodiment approach 2

[0018] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the Ln 2 CuO 4 The preparation method is carried out according to the following steps: press Ln 2 CuO 4 The stoichiometric ratio, the purity greater than 99.99% of Ln x o y Mix with CuO, where x=2 or 6, y=3 or 11; then grind in a ball mill for 12h to 24h, and then sinter at a temperature of 1000°C to 1100°C for 18h to 24h to obtain Ln 2 CuO 4 . Others are the same as in the first embodiment.

specific Embodiment approach 3

[0019] Specific implementation mode three: this implementation mode is the same as the specific implementation mode: the Ce described 0.9 Gd 0.1 o 1.95 The preparation method is carried out according to the following steps:

[0020] A. At a temperature of 50°C to 80°C, add 4.4g of Ce(NO 3 ) 3 and Gd(NO 3 ) 3 Dissolve in 250mL of deionized water, then heat and stir for 5h at a temperature of 80°C and a stirring rate of 100 rpm, and then add 12.0g of glycine to obtain a mixed solution;

[0021] B. Stir the mixed solution until uniform and transparent, then heat and evaporate to a viscous jelly at a temperature of 120°C, and then continue heating at a temperature of 200°C until the jelly spontaneously ignites to obtain a light yellow powder;

[0022] C. Sinter the light yellow powder obtained in step B at a temperature of 900°C in an air atmosphere for 12 hours to obtain Ce 0.9 Gd 0.1 o 1.95 . Others are the same as in the first embodiment.

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Abstract

The invention relates to a solid oxide fuel cell composite cathode Ln2CuO4-Ce0.9Gd0.1O1.95 and a preparation method thereof. The invention relates to a cell composite cathode material and a preparation method thereof, aiming at solving the problem that the catalytic activity and electro-chemical property of the cathode material are pool. The solid oxide fuel cell composite cathode Ln2CuO4-Ce0.9Gd0.1O1.95 is made of Ln2CuO4 and solid electrolyte Ce0.9Gd0.1O1.95; the method comprises the steps of: I. weighing; II. preparing mixed stock; III. preparing a prefabricated body; and IV. preparing the solid oxide fuel cell composite cathode Ln2CuO4-Ce0.9Gd0.1O1.95. According to the solid oxide fuel cell composite cathode Ln2CuO4-Ce0.9Gd0.1O1.95 and the preparation method thereof, the reaction active site of the cathode is extended into the overall cathode material, the active region of the oxygen reduction reaction can be enlarged, and the electrochemical property of the cathode can be improved. The preparation method is used for preparing solid oxide fuel cell composite cathode.

Description

technical field [0001] The invention relates to a composite cathode material for a battery and a preparation method thereof. Background technique [0002] The intermediate temperature solid oxide fuel cell is a new type of energy conversion device, which is attracting more and more attention from various countries because of its advantages of high efficiency and environmental friendliness. However, the reduction of battery operating temperature will cause a rapid decline in electrode activity, and the performance of the cathode material affects the performance of the entire battery system. Therefore, it is a critical issue to improve the electrode performance of existing cathode materials. The construction of excellent composite cathode materials can increase the active area of ​​the three-phase interface of the electrode reaction, improve the mixed conductivity of the material, and then improve the electrochemical performance of the cathode material. Contents of the inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/90
CPCY02E60/50
Inventor 李强赵辉孙川孙丽萍
Owner HEILONGJIANG UNIV
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