Preparation method of solid oxide fuel cell electrode with high porosity amount and long tunnel

A technology of fuel cell electrodes and solid oxides, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problem of high sintering temperature of the three-phase interface, achieve high porosity, simple and easy preparation, and solve the problem of low three-phase interface Effect

Inactive Publication Date: 2014-11-19
DALIAN UNIV OF TECH
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  • Abstract
  • Description
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Problems solved by technology

[0004] In order to realize the interconnection of pores and improve the performance of the battery, the purpose of the present invention is to provide a method for preparing a high-porosity long-channel solid oxide fuel cell electrode, using a new material as a solid oxide fuel cell electrode pore-forming agent, through Grinding and calcination methods, using cheap pore-forming media to prepare battery electrodes with high porosity and long pore structure, to solve the problem of less three-phase interface, carbon deposition and high sintering temperature during the preparation of low melting point electrode materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example

[0015] Mix and grind 0.3 g of nickel oxide and 0.2 g of yttria-stabilized zirconia (YSZ), add absolute ethanol and grind for 1 hour. Put a certain amount of absorbent cotton in a drying oven at 50°C and dry for 1 hour, add 0.025 g of absorbent cotton until the mortar continues to grind for 1 hour, then add 0.2 g of binder (4:1 α-terpineol and ethyl fiber Grind evenly to form an anode material; pick up 0.1 g of the prepared anode material and coat it on the electrolyte side of the solid oxide fuel cell, put it in a muffle furnace, and use a temperature controller to keep the temperature at 170°C at a rate of 5 / min for 1 hours to make the absorbent cotton fully burnt, continue to heat up to 900 ° C for 1 hour, and cool down to room temperature naturally to obtain the desired anode with high porosity and long pore structure.

[0016] The specific heating process is as follows:

[0017] temperature(℃)

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Abstract

The invention relates to a preparation method of a solid oxide fuel cell electrode with high porosity amount and long tunnel, which belongs to the preparation method of the solid oxide fuel cell of the porous electrode with high specific surface area. According to the invention, a toughness filamentary material is taken as a pore forming agent of the solid oxide fuel cell electrode, material with no obvious filamentary is obtained by uniformly grinding with the electrode material, a binder is added for uniformly grinding, a finally uniform grinded mixing material is coated on one side of an electrolyte; the electrolyte coated with the uniform grinded mixing material is placed in a muffle furnace for calcining, then cooled to obtain the solid oxide fuel cell electrode with high porosity amount and long tunnel. The method for preparing the electrode solves the problems of low three-phase interface of the cell anode and excessive electrode sintering temperature.

Description

technical field [0001] The invention belongs to the technical field of functional ceramics, and relates to the selection of a pore-forming agent and the preparation process and processing of a porous electrode, in particular to a method for manufacturing a solid oxide fuel cell with a high-specification porous electrode. Background technique [0002] Solid oxide fuel cell is a new type of energy conversion device, which has the advantages of high efficiency and low pollution, and has attracted extensive attention. The electrodes of solid oxide fuel cells are porous metals or metal oxide ceramics. The porous structure of the electrode is very important for the electrode to form a three-phase interface of gas, catalyst and electrolyte. Only when a sufficient three-phase interface is formed, the battery can have good performance. Patent CN103825032A uses flour as a pore-forming agent when preparing battery anodes; patent CN103811788A uses powdered ethyl cellulose plus liquid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88
CPCH01M4/8817H01M4/8825H01M4/8875H01M4/8885Y02E60/50
Inventor 由宏新曲斌管亚军刘润杰
Owner DALIAN UNIV OF TECH
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