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Solid oxide fuel cell with symmetrical electrodes, and preparation method and application thereof

A solid oxide and fuel cell technology, used in solid electrolyte fuel cells, fuel cells, battery electrodes, etc., can solve the problems of low catalytic activity and long preparation period of impregnated electrodes, and achieve improved catalytic activity, short preparation period, The effect of eliminating carbon deposits

Inactive Publication Date: 2014-05-21
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

[0006] Aiming at the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a solid oxide fuel cell with good electrochemical performance and a symmetrical electrode and its preparation method and application, so as to solve the problem of carbon deposition on the anode of the battery and the problem of the oxide electrode. low catalytic activity and long preparation cycle of impregnated electrodes

Method used

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  • Solid oxide fuel cell with symmetrical electrodes, and preparation method and application thereof
  • Solid oxide fuel cell with symmetrical electrodes, and preparation method and application thereof
  • Solid oxide fuel cell with symmetrical electrodes, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] a) Preparation of porous electrolyte|dense electrolyte|porous electrolyte skeleton structure

[0050] to La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 o 3 (LSGM) In the electrolyte powder 30g, add solvent absolute ethanol, butanone each 4g, dispersant triethanolamine 5g and acrylic acid copolymer 1g successively, binder epoxy resin 5g and plasticizer polyethylene glycol 4g; After mixing Obtain a uniform and stable slurry by ball milling, vacuum defoam the slurry, remove the air in the slurry, and tape cast to obtain a dense electrolyte layer green body;

[0051] To 30g of LSGM electrolyte powder, add solvent absolute ethanol, butanone 4g each, dispersant triethanolamine 5g and acrylic acid copolymer 1g, binder epoxy resin 5g, pore-forming agent ammonium oxalate 20g and plasticizer polyethylene 4 g of diol; after mixing, a uniform and stable slurry is obtained by ball milling, the slurry is vacuum defoamed, the air in the slurry is removed, and the porous electrolyte layer green body...

Embodiment 2

[0066] The preparation process is the same as in Example 1, except that the electrolyte material is replaced by YSZ (doped with 8wt% Y 2 o 3 ZrO 2 ). The porosity of the porous YSZ layer is about 55%, and the thickness of the dense YSZ layer is about 30 μm. The impregnated SFMO accounts for about 25% of the pore volume fraction of the porous layer.

[0067] The test conditions are the same as in Example 1. When hydrogen is used as fuel, the open circuit voltage of the single cell is between 1.021V and 1.07V in the range of 600-800°C, and the maximum output power at 600, 650, 700, 750, and 800°C are respectively 78, 130, 193, 250, 313mW·cm -2 between. When propane is used as fuel, the open circuit voltage of a single cell is between 0.9V and 0.88V in the range of 750-800°C, and the maximum output power at 750°C and 800°C is 74 and 155mW·cm respectively -2 between.

Embodiment 3

[0069] The preparation process is the same as in Example 1, except that the electrolyte material is replaced by ScSZ (doped with 10wt%Sc 2 o 3 ZrO 2 ), the electrocatalytic thin film electrode material was replaced by LaSr 2 Fe 2 CrO 9 .

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Abstract

The invention discloses a solid oxide fuel cell with symmetrical electrodes and a preparation method and application thereof. The solid oxide fuel cell has the following symmetrical structure: an electrocatalysis membrane electrode deposited on the inner wall of the pore of a porous electrolyte, a compact electrolyte layer and another electrocatalysis membrane electrode deposited on the inner wall of the pore of the porous electrolyte. The preparation method comprises the following steps: preparing a porous electrolyte / compact electrolyte / porous electrolyte skeleton structure and an electrocatalysis membrane electrode infiltration precursor solution; infiltrating the prepared porous electrolyte / compact electrolyte / porous electrolyte skeleton structure in the electrocatalysis membrane electrode infiltration precursor solution by using an impregnation method; and carrying out heat treatment. The cell provided by the invention has the advantages of good thermal expansion coupling performance, good thermal shock resistance, low cost, a short preparation period, etc.; and when hydrocarbon is used as a fuel, carbon deposition on the positive electrode of the cell can be effectively prevented, and the cell can be used as an electrolytic bath and has commercialization prospects.

Description

technical field [0001] The invention relates to a novel solid oxide fuel cell and its preparation method and application, in particular to a solid oxide fuel cell with symmetrical electrodes and its preparation method and application, belonging to the technical field of solid oxide fuel cells. Background technique [0002] Solid Oxide Fuel Cell (SOFC) is a high-efficiency power generation device that directly converts chemical energy in fuel into electrical energy. If combined heat and power is used, its fuel utilization rate can be close to 75% in theory, but the actual obtained The fuel utilization rate in the battery system has also exceeded 50%. Among the existing fuel-to-electricity devices, the efficiency is the highest (High Temperature Solid Oxide Fuel Cell-Principle, Design and Application; Subhash, C.Singhal, Kevin Kendall, editor-in-chief , translated by Han Minfang and others; p. 15). Moreover, SOFC can not only use hydrogen as fuel, but also use hydrocarbon fue...

Claims

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Application Information

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IPC IPC(8): H01M8/12H01M4/86H01M8/1233H01M8/1253
CPCH01M8/1213H01M8/124H01M2008/1293Y02E60/50
Inventor 占忠亮孟燮邵乐韩达钱继勤刘雪娇王绍荣
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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