PEN multilayer film of middle temperature solid oxide fuel cell and its producing method

A solid oxide and fuel cell technology, used in solid electrolyte fuel cells, fuel cells, fuel cell components, etc., can solve the problems of large electrolyte layer thickness, poor mechanical strength, low battery open circuit voltage and output power, etc. Achieve the effect of improving overall performance, increasing open circuit voltage, and good interface bonding

Inactive Publication Date: 2003-04-09
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In comparison, planar SOFC has the advantages of low cost and easy scale-up of the battery. The disadvantage is that if an electrolyte-supported structure (such as Siemens) is used, in order to make the PEN multilayer film have sufficient strength, the electrolyte membrane The layer must have sufficient thickness; if using DCO or LaCrO 3 As an electrolyte, because its mechanical strength is not as good as YSZ, this problem is particularly prominent; and the increase in the thickness of the electrolyte layer will inevitably increase its ohmic impedance, so that the open circuit voltage and output power of the battery are not high; in addition, due to the electrolyte layer and electrode layer ( Especially the anode layer) has a large difference in thermal expansion coeff

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare A and B to prepare NiO+GCO(Ce 0.9 Gd 0.1 O 1.95 ) Anode powder, the weight content of NiO in powder A is 78.3% (equivalent to 70% by volume of Ni), the average particle size of NiO and GCO are 5μm and 3μm, respectively; the weight content of NiO in powder B is 60.9 % (Equivalent to containing 50% Ni by volume), the average particle size of NiO and GCO are 3 μm and 0.5 μm, respectively. Put water and powder A into a ball milling tank at a weight ratio of 4:6, and add 1% ceramic slurry dispersant, 3% polyethylene glycol plasticizer, and 6% acrylamide and methylene respectively. Bis-acrylamide binder, add ZrO according to the ratio of 3:1 2 The ceramic balls are milled and mixed on a ball mill for 24 hours to obtain a water-based gel casting slurry, and then 1.5% ammonium persulfate initiator and 0.05% tetramethylethylenediamine catalyst are added to the slurry, and mixed After uniformity, cast on a casting machine; after the obtained cast wet blank is dried, cast a sl...

Embodiment 2

[0034] Prepare A, B, C to prepare NiO+SCO(Ce 0.8 Sm 0.2 O 1.9 ) Anode powder, the weight content of NiO in powder A is 78.3% (equivalent to 70% by volume of Ni), the average particle size of NiO and SCO are 4μm and 3μm, respectively; the weight content of NiO in powder B is 60.9 % (Equivalent to containing 50% by volume of Ni), the particle size of NiO and SCO are 2μm and 1μm respectively; the weight ratio of NiO and SCO in C powder is 40% (equivalent to containing 30% by volume of Ni), NiO and SCO The particle sizes are 0.5μm and 0.1μm, respectively. Use methylhexanone / ethanol as the solvent for the three powders A, B and C respectively, according to the solvent: powder: trihexanolamine dispersant: dibutyl phthalate plasticizer: polyvinyl butyral The binder is in the ratio of 1:1:0.02:0.1:0.1, put into the ball milling tank, the ball-to-material ratio is 3:1, after the ball mill is mixed for 20 hours, it is cast on the casting machine to form, and the contents are obtained after ...

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Abstract

This invention relates to PEN multilayer film of warm solid oxide full cell and its processing method characterized by multiple doctor-blading layer by layer or stratified doctor-blading and multi-layer co-rolling, then lour-temp. co-senlering to obtain anode/electrolyte double-layer film, after that, preparation of cathode layer and PEN multilayer, film, in which the thickness of NiO+DCO porous anode layer is 0.5-1 mm, NiO content or crysal size expressing graded distribution along the thickness direction. Weight content varies from 70-80% to 50-60%, crystal size varies from 5-8 um to 1-3 um, DCO electrolyte thickness is 20-150 um, with relative density higher than 96%, and thickness of LaCoO3 porous cathode layer of 30-50 um.

Description

Technical field: [0001] The invention belongs to the technical field of fuel cell manufacturing methods, and particularly relates to material selection, structure design and manufacturing methods for the anode / electrolyte / cathode (PEN) multilayer film of the core component of a flat intermediate temperature solid oxide fuel cell (IT-SOFC). Background technique: [0002] According to the "Solid State Ionics" magazine (Solid State Ionics, Vol.70 / 71, 101-108, 1994), traditional SOFC uses Y 2 O 3 Stable ZrO 2 (YSZ) is used as an electrolyte. Due to the low conductivity of YSZ, the battery must be operated at a high temperature of 900-1000℃, which imposes strict requirements on the selection of battery connection and sealing materials, and makes the battery cost high and restricts Its promotion and application. Therefore, lowering the operating temperature and developing SOFCs that can operate at moderate temperatures (450-800°C) are the keys to commercialization. One of the more effe...

Claims

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Application Information

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IPC IPC(8): H01M4/94H01M8/023H01M8/1213H01M8/1246
CPCY02E60/521Y02E60/50Y02P70/50
Inventor 孟广耀程继贵李海滨夏长荣刘杏芹彭定坤
Owner UNIV OF SCI & TECH OF CHINA
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