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Medium-temperature SOFC (solid oxide fuel cell) flat-plate anode-supported monocell anode structure and preparation method thereof

An anode-supported, anode-structured technology, applied in battery electrodes, structural parts, solid electrolyte fuel cells, etc., can solve problems such as large amount of raw materials, low battery mechanical strength, and anode performance degradation.

Active Publication Date: 2014-09-10
JINGDEZHEN CERAMIC INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The two layers closely combined with the anode functional layer are the electrolyte thin layer and the anode support layer respectively. The anode support layer is the support part of the battery. The thickness of this layer is designed to be 300-1000 μm. Concentration polarization, the performance of the anode decreases, and the amount of raw materials is also large; if it is too thin, the mechanical strength of the battery is too low, which is not conducive to stacking

Method used

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  • Medium-temperature SOFC (solid oxide fuel cell) flat-plate anode-supported monocell anode structure and preparation method thereof
  • Medium-temperature SOFC (solid oxide fuel cell) flat-plate anode-supported monocell anode structure and preparation method thereof

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Embodiment 1

[0047] Preparation of medium-temperature SOFC planar anode-supported single-cell anode structure:

[0048] (1) Preparation of water-based anode functional layer slurry (moisture content 38wt%): wherein, NiO:8YSZ is 50:50 by weight, the particle size of the powder before sintering is 0.35 μm, and the particle size of the two powders is basically the same; The pore forming agent is monodisperse spherical polymethyl methacrylate (PMMA), the pore diameter of the pore forming agent is about 1.8 μm, and its dosage is 5wt% of the total mass of NiO and 8YSZ; the anode functional layer is cast by a tape casting process Thickness of film green sheet, after drying at 30°C for 10 minutes, is 30 μm;

[0049] (2) Preparation of water-based anode support layer slurry (moisture content 35wt%): wherein, NiO:5YSZ is 60:40 weight ratio, and the particle size of the powder before sintering is 0.7 μm, and the particle size of the two powders is basically the same, Its pore-forming agent is monodi...

Embodiment 2

[0058] Preparation of medium-temperature SOFC planar anode-supported single-cell anode structure:

[0059] (1) Preparation of water-based anode functional layer slurry (water content 40wt%): wherein, NiO:8YSZ is 45:55 by weight, the particle size of NiO powder before sintering is 0.15 μm, and the particle size of 8YSZ powder is 0.25 μm ; The pore-forming agent is polymethyl methacrylate (PMMA), monodisperse spherical, the pore-forming agent has a pore diameter of about 3.0 μm, and its amount is 3.0wt% of the total mass of NiO and 8YSZ. The anode functional layer film green sheet was cast by casting process, and the thickness was 36 μm after drying at 60°C for 5 minutes;

[0060] (2) Prepare the water-based anode support layer slurry (water content 36wt%), the proportion is NiO:3YSZ is 55:45 weight ratio, the particle size of the NiO powder before sintering is 0.6 μm, and the particle size of the 3YSZ powder is 0.8 μm, its pore forming agent is methyl methacrylate (PMMA), mono...

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Abstract

The invention relates to a medium-temperature SOFC (solid oxide fuel cell) flat-plate anode-supported monocell anode structure which comprises an anode functional layer and an anode support layer in tight connection with the anode functional layer, wherein the anode functional layer is obtained through sintering of NiO powder and YSZ (Yttria Stabilized Zirconia) powder of which the mass rate is (45-55) :(55-45) and which are doped with a pore-forming agent accounting for 3-6 wt% of the NiO powder and the YSZ powder based on total weight, the anode support layer is obtained through sintering of the NiO powder and the YSZ powder of which the quality mass rate is (50-60) :(50-40) and which are doped with the pore-forming agent accounting for 5-9 wt% of the NiO powder and the YSZ powder based on total weight, an anode structure blank is produced through double-layer curtain coating, and the anode structure is obtained through hot pressing, leveling and high-temperature co-firing of the anode structure blank. The monocell anode structure is simple and effective, and is easy to implement at industrial scale, the preparation method can be also applicable for industrial-scale production, and stability and high consistence through mass production are guaranteed.

Description

technical field [0001] The invention relates to a medium-temperature SOFC planar anode-supported single-cell anode structure and a preparation method thereof, belonging to the technical field of preparation of new energy materials and devices. Background technique [0002] Solid oxide fuel cell (SOFC for short) is a new type of energy conversion device with the highest energy conversion efficiency, which converts the chemical energy of fuel into electrical energy, and its combined heat and power supply can reach more than 80%. It has great commercial value and development prospect. Due to its lower operating temperature than high-temperature SOFC, medium-temperature SOFC is the development direction of SOFC and is currently a hot spot for commercial development. Medium-temperature SOFC is an anode-supported battery composition. According to the shape design of the battery, the battery can be divided into two categories: tubular and flat. The tubular single cells are easy to...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88
CPCY02E60/50H01M4/8857H01M4/9075H01M8/10
Inventor 罗凌虹吴也凡石纪军黄祖志程亮孙良良
Owner JINGDEZHEN CERAMIC INSTITUTE
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