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A kind of preparation method of solid oxide fuel cell cathode current collector

A fuel cell cathode, solid oxide technology, applied in solid electrolyte fuel cells, fuel cell parts, fuel cells and other directions, can solve the problems of complex preparation process, achieve simple process, good high temperature toughness, good application prospects Effect

Active Publication Date: 2016-08-17
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the defects of complex preparation process of the existing fuel cell current collector, and the present invention provides a method for preparing a solid oxide fuel cell cathode current collector

Method used

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  • A kind of preparation method of solid oxide fuel cell cathode current collector
  • A kind of preparation method of solid oxide fuel cell cathode current collector
  • A kind of preparation method of solid oxide fuel cell cathode current collector

Examples

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preparation example Construction

[0040] The preparation method of described current collector casting film, comprises the following steps:

[0041] A. Mix the current collector material with alcohol and methyl ethyl ketone solvent, triethanolamine dispersant, and ball mill to mix;

[0042] B. the mixed slurry of step A is equipped with dibutyl phthalate and polyvinyl alcohol plasticizer, polyvinyl butyral binder, graphite pore-forming agent and triethanolamine dispersant, and ball milling and mixing;

[0043] C. After sieving the slurry mixed in step B with a 60-80 mesh drying net and vacuum degassing treatment, cast it on the casting machine according to the required thickness and size;

[0044] D. Cut the dried biscuit into the required size, laminate and vacuum seal, and then carry out isostatic pressing.

[0045] The ball milling condition in step A is to use a planetary ball mill for 1-3 hours under the controllable condition of 0-50Nz.

[0046] The ball milling condition in step B is to use a planetar...

Embodiment 1

[0062] Preparation of SOFC cathode current collector green body

[0063] Weigh 25g cathode current collector material (such as: La 0.8 Sr 0.2 CoO 3 (LSC), La 0.8 Sr 0.2 MnO 3 (LSM) and (Mn,Co) 3 o 4 ), with alcohol and butanone (according to 1:1 mass ratio) mixed solvent, add triethanolamine dispersant, and then use planetary ball mill to mix ball ink under 50Nz (400 rpm) controllable conditions for 1 hour. Then add dibutyl phthalate and polyvinyl alcohol plasticizer, polyvinyl butyral binder, graphite pore-forming agent and triethanolamine dispersant, mix well by ball milling, and then use planetary ball milling The ball mill was mixed for 2 hours under the controllable condition of 50Nz (400 rpm). After sieving through a 60-mesh screen and vacuum degassing treatment, it is cast on a tape casting machine. The casting film was dried at 50°C for 1 hour, cut into the required size, laminated and hot pressed at 75°C under a pressure of 10-12MPa to obtain the desired gree...

Embodiment 2

[0065] Weigh 50gLSC, 50g(Mn,Co) 3 o 4 , after preparing the current collector green body according to the steps of Example 1, it was assembled on the cathode of the battery. After heating at a rate of 1 °C / min to 600 °C for 2 hours, and then at a rate of 2 °C / min to 850 °C for 1 hour, the battery cathode current collector is formed in situ. image 3 where a and b are LSC and (Mn,Co) respectively 3 o 4 SEM images of current collectors.

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Abstract

The invention relates to a preparation method of a cathode current collector of a solid oxide fuel cell. The preparation method comprises the steps of (1) preparing slurry containing an active component of the cathode current collector of the solid oxide fuel cell; (2) carrying out tape casting on the slurry prepared in the step (1) to prepare a precursor cast film; (3) laminating and carrying out hot pressing on the precursor cast film obtained in the step (2) to obtain current collector element billet; (4) assembling the current collector element billet obtained in the step (3) onto a cathode of the solid oxide fuel cell to form the cell, and forming the cathode current collector by in-situ sintering in the cell test heating process.

Description

technical field [0001] The invention belongs to the field of fuel cells, and in particular relates to a method for preparing a solid oxide fuel cell cathode collector. Background technique [0002] Solid oxide fuel cell (SOFC) is an efficient all-solid-state electrochemical energy conversion device that directly converts chemical energy into electrical energy. The loss is mainly concentrated in the internal resistance of the battery, including ohmic impedance and polarization impedance. The ohmic impedance includes the impedance of the electrolyte material itself and the contact resistance between various components. The resistance of the electrolyte material itself can be reduced by thinning the electrolyte, or using an electrolyte with high oxygen ion conductivity to reduce the resistance. The contact resistance, especially the contact resistance between the high-temperature sintered cathode porous ceramic material and the connecting body material, occupies the main part...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/0217H01M8/0236H01M8/1213H01M8/12
CPCH01M8/0202H01M8/12Y02E60/50
Inventor 骆婷占忠亮王绍荣辛显双曾凡蓉
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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