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Method for preparing anode/electrolyte double-layer structure of solid oxide fuel cell by single grouting

A solid oxide, solid electrolyte technology, applied in battery electrodes, structural parts, circuits, etc., can solve the problems of complex preparation process of SOFC, and achieve the effect of simple process, shortened production cycle, and simplified process

Inactive Publication Date: 2012-09-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that in the existing traditional grouting process, a single grouting can only prepare the anode, electrolyte or cathode of SOFC, which leads to the complicated preparation process of SOFC. The present invention provides a single grouting Method for preparing solid oxide fuel cell anode / electrolyte double layer structure

Method used

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  • Method for preparing anode/electrolyte double-layer structure of solid oxide fuel cell by single grouting
  • Method for preparing anode/electrolyte double-layer structure of solid oxide fuel cell by single grouting
  • Method for preparing anode/electrolyte double-layer structure of solid oxide fuel cell by single grouting

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specific Embodiment approach 1

[0016] Specific Embodiment 1: The method for preparing a solid oxide fuel cell anode / electrolyte double-layer structure by single grouting in this embodiment is realized through the following steps: 1. Preparation of slurry: mix NiO powder and solid electrolyte powder according to the mass ratio Mix at a ratio of (0.2~5):1, then add gum arabic and water, and then ball mill for 0.25~24h to obtain a slurry, wherein the mass of gum arabic is 1%~20% of the total mass of NiO powder and solid electrolyte powder , the quality of water is 0.3~5 times of the total mass of NiO powder and solid electrolyte powder, the particle size of NiO powder is 1~50 microns, and the particle size of solid electrolyte powder is 50~800nm; 2. The anode / electrolyte double layer structure Preparation: Pour the slurry obtained in step 1 into a flat-bottomed mold with only plaster at the bottom, let it stand for 5-15 hours to obtain a green body, and then place the green body at a temperature of 1000-1500 ° ...

specific Embodiment approach 2

[0019] Embodiment 2: This embodiment differs from Embodiment 1 in that the NiO powder is pre-fired at a temperature of 600-1100°C for 2-5 hours before mixing the NiO powder with the solid electrolyte powder in Step 1. Other steps and parameters are the same as those in Embodiment 1.

[0020] In this embodiment, the NiO powder is pre-fired to adjust the particle size of the NiO powder. Part of the NiO powder particles are agglomerated, and the particle size of the agglomerated particles becomes larger, so that the difference in sedimentation speed between it and the solid electrolyte powder becomes larger, which is more conducive to obtaining the composition The solid oxide fuel cell anode / electrolyte double-layer structure with more obvious double-layer structure and better performance can be obtained by high-temperature sintering of the green body with obvious distribution characteristics and good layering.

specific Embodiment approach 3

[0021] Embodiment 3: This embodiment is different from Embodiment 2 in that the NiO powder is pre-calcined at a temperature of 800-1000° C. for 3-5 hours. Other steps and parameters are the same as in the second embodiment.

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Abstract

The invention discloses a method for preparing an anode / electrolyte double-layer structure of a solid oxide fuel cell by single grouting, relating to a preparation method of an anode / electrolyte double-layer structure of a solid oxide fuel cell. The invention solves the problem of complex preparation process of an SOFC (Solid Oxide Fuel Cell), caused by the condition that only the anode, the electrolyte or the cathode of the SOFC can be prepared through single grouting in the conventional grouting process. The method comprises the following steps of: firstly, preparing slurry; and secondly, grouting and curing to obtain a blank, and then sintering the blank to obtain a finished product. The method breaks through the restriction that only a single-layer blank can be obtained through the grouting in the conventional grouting technique, the anode / electrolyte double-layer structure is prepared through the single grouting, the grouting cost is low, the efficiency is high, the energy consumption is low, and the manufacture period of the whole cell is greatly shortened. The monomer solid oxide fuel cell prepared from the anode / electrolyte double-layer structure has the maximum power density up to 0.44W / cm<2> at 800 DEG C.

Description

technical field [0001] The invention relates to a method for preparing a solid oxide fuel cell anode / electrolyte double-layer structure. Background technique [0002] Solid Oxide Fuel Cell (SOFC) is a new generation energy technology. It can directly convert the chemical energy of the fuel into electrical energy, and because it is not limited by the Carnot cycle, the energy conversion efficiency is greatly improved. SOFC consists of anode, electrolyte and cathode. At present, the hot spot and key issue of SOFC research is how to reduce the operating temperature of the battery while ensuring higher power output. In order to reduce the operating temperature, the concept of anode-supported thin-film SOFC was proposed. With this structure of SOFC, the electrolyte is attached to the anode support in the form of a thin film, which can greatly reduce the ohmic resistance of the electrolyte and reduce the operating temperature of the battery by more than 200°C. How to obtain the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88
CPCY02E60/50
Inventor 张耀辉张海广吕喆刘明良朱星宝李文渊苏文辉
Owner HARBIN INST OF TECH
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