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Method for mfg. anode carried thin film medium-temp. solid oxide fuel cell

A solid oxide, fuel cell technology, used in solid electrolyte fuel cells, fuel cells, circuits, etc., to avoid mutual reactions

Inactive Publication Date: 2003-03-12
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of supported LSGM film-based intermediate temperature SOFCs is still a huge challenge in the field of SOFC research and development.

Method used

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  • Method for mfg. anode carried thin film medium-temp. solid oxide fuel cell
  • Method for mfg. anode carried thin film medium-temp. solid oxide fuel cell
  • Method for mfg. anode carried thin film medium-temp. solid oxide fuel cell

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example 1

[0043] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Example 1: Preparation of Porous YSZ Substrate

[0044] With product Y 2 o 3 Stable ZrO 2 (YSZ) Preparation of porous YSZ substrates. Y in YSZ 2 o 3 The doping amount is 8% (molar ratio) (TZ-8Y). Graphite is mixed into YSZ powder as a pore-forming agent. The doping amount of the pore forming agent is 45-50wt%. Grind the above powder evenly in an agate crucible, after drying, apply an axial pressure of 0.5-15Mpa in a Φ25 stainless steel abrasive tool, and press it into a substrate with a thickness of 1.5mm. Baking the substrate at 1000-1100 DEG C, removing the pore-forming agent, and making a porous YSZ substrate with certain mechanical strength, the porosity of the substrate is in the range of 60-80%. Example 2: Preparation of LSGM electrolyte film on porous YSZ substrate

example 2

[0044] With product Y 2 o 3 Stable ZrO 2 (YSZ) Preparation of porous YSZ substrates. Y in YSZ 2 o 3 The doping amount is 8% (molar ratio) (TZ-8Y). Graphite is mixed into YSZ powder as a pore-forming agent. The doping amount of the pore forming agent is 45-50wt%. Grind the above powder evenly in an agate crucible, after drying, apply an axial pressure of 0.5-15Mpa in a Φ25 stainless steel abrasive tool, and press it into a substrate with a thickness of 1.5mm. Baking the substrate at 1000-1100 DEG C, removing the pore-forming agent, and making a porous YSZ substrate with certain mechanical strength, the porosity of the substrate is in the range of 60-80%. Example 2: Preparation of LSGM electrolyte film on porous YSZ substrate

[0045] First prepare the LSGM slurry. Disperse the self-made LSGM superfine powder in ethanol, add polyvinyl alcohol as a gelling agent, the addition amount is 4-6% of the LSGM powder mass, add 0.3-0.5% of the LSGM powder mass fish oil as a dispe...

example 3

[0046] The prepared LSGM slurry is evenly spread on one surface of the porous YSZ film by casting method, and the thickness is controlled at 100-150 microns. Co-sinter the YSZ substrate and the LSGM film at 1300-1500°C to make the LSGM film dense and bond closely with the YSZ substrate. The thickness of the dense LSGM film prepared after sintering is controlled at 50-80 microns. The cross-section and surface morphology of the supported LSGM film prepared by this method are as follows: figure 1 , 2 shown. exist figure 1 The upper part of the middle photo is the Ni-YSZ cermet anode prepared by impregnation method, in which the fine particles distributed in the porous YSZ framework are metal Ni catalysts. The middle part of the photo is the loaded LSGM electrolyte film. It can be seen that the electrolyte film is relatively dense and tightly combined with Ni-YSZ. The lower part of the photo is the LSM-YSZ composite cathode. The prepared cathode layer also has a porous struc...

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Abstract

The method for manufacturing the integrated part of the anode-dielectric-cathode used in the solid oxide full cell (SOFC) includes following steps. The flow casting method providing low cost and easy to scale-up is accepted for preparing the dielectric membrane. The densification of the dielectric membrane is carried out at high temperature. The specific preparing technique is utilized so as to prevent the chemical reaction of the anode catalyst Ni with LSGM membrane in the densification processing. The thickness of the even and compact LSGM membrane is 5-100 micros. The LSGM membrane can be used as the dielectric membrane in SOFC single cell in plateau form at middle temperature. The maximum output power density of the said SOFC single cell can reach to 850 mW / cm2 at temperature 800 deg.C (hydrogen as fuel, air as oxide agent).

Description

technical field [0001] The invention relates to a method for preparing anode loaded La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 o 3-δ (LSGM) anode-electrolyte-cathode three-in-one method for electrolyte membrane type medium temperature solid oxide fuel cell (SOFC). This method can effectively avoid the chemical reaction between NiO and LSGM in the anode substrate during high-temperature sintering and densification of the electrolyte film, thereby preparing a SOFC single cell based on the supported LSGM film with high output performance. Background technique [0002] Solid oxide fuel cell (SOFC) is an energy conversion device that directly converts the chemical energy of fuel into electrical energy. In addition to being not limited by the Carnot cycle, SOFC has the characteristics of high energy utilization and environmental friendliness, which are common to various fuel cells. It also has many advantages that other types of fuel cells cannot match: the fuel has a wide range of applicat...

Claims

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Application Information

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IPC IPC(8): H01M8/1213H01M8/1253
CPCY02E60/521Y02E60/50Y02P70/50
Inventor 阎景旺董永来江义张华民衣宝廉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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