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Electrolyte for solid oxide fuel cell and preparation method thereof

A solid oxide, fuel cell technology, used in solid electrolyte fuel cells, fuel cells, circuits, etc., can solve the problem that the electrolyte is not suitable for medium and low temperature conditions, and achieve improved open circuit voltage, high electrical conductivity, and increased output power density. Effect

Inactive Publication Date: 2014-04-23
FUZHOU UNIV
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Problems solved by technology

Traditional electrolytes are no longer suitable for medium and low temperature conditions, so it is necessary to seek electrolytes with high conductivity at medium and low temperatures

Method used

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  • Electrolyte for solid oxide fuel cell and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0030] 1. BaCe 0.8 Y 0.2 o 2.9 The preparation method is:

[0031] 1) Press BaCe 0.8 Y 0.2 o 2.9 The stoichiometric ratio weighs Ba(NO 3 ) 2 , Ce(NO 3 ) 3 ·6H 2 O, Y (NO 3 ) 3 ·6H 2 O, and weigh EDTA and citric acid in molar ratio EDTA: citric acid: metal cation=1:2:1;

[0032] 2) The weighed Ce(NO 3 ) 3 ·6H 2 O, Y (NO 3 ) 3 ·6H 2 O mixed, add dilute nitric acid until completely dissolved;

[0033] 3) Ba(NO 3 ) 2 , ethylenediaminetetraacetic acid, citric acid, add ammonia water until completely dissolved;

[0034] 4) Pour the above two solutions together, add ammonia water dropwise (the concentration of ammonia water is 15%-20%) to adjust the pH value to 6;

[0035]5) Put the mixed solution obtained in step 4) into a stirrer and heat to 70°C, stir continuously at 70°C, and keep the pH value of the solution at 6 by adding ammonia water during the stirring process until a gel is formed;

[0036] 6) Move the gel into an evaporating dish and heat it on an e...

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Abstract

The invention relates to an electrolyte for a solid oxide fuel cell and a preparation method thereof. In order to improve the performance of the electrolyte of the solid oxide fuel cell, the invention adopts a nitrate gel combustion method to prepare 30%BaCe0.8Y0.2O2.9-70%Ce0.8Gd0.2O1.9 electrolyte. When the electrolyte is used for the solid oxide fuel cell, the operating temperature of the cell is intermediate temperate 600-800 DEG C, but the operating temperature of the traditional solid oxide fuel cell is high temperate 900-1000 DEG C. The relative density of the electrolyte achieves 100 percent. Under the humid air atmosphere (3%H2O) and the temperature 700 DEG C, the conductivity is 0.01S / cm and is higher than the conductivity of the commonly-used electrolytes Ce0.8-Gd0.2O1.9 and BaCe0.8Y0.2O2.9 prepared by the same method.

Description

technical field [0001] The invention belongs to the field of electrolytes for batteries, and in particular relates to an electrolyte for solid oxide fuel cells and a preparation method thereof. Background technique [0002] The global demand for energy is expanding day by day, and the problem of environmental degradation is gradually being paid attention to. The traditional energy system will not be able to meet the requirements of the society for an efficient, clean, safe and economical energy system. The development of energy will face huge challenges. Therefore, fuel cells It will become an important energy device in the 21st century. Solid Oxide Fuel Cell (SOFC) directly converts the chemical energy in fossil fuels into electrical energy through the electrochemical reaction process. Since there is no combustion and mechanical process, the energy conversion efficiency is greatly improved, and NOx, SOx, and CO are avoided or reduced. , CO 2 And the generation of pollutan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/10H01M8/1016
CPCY02E60/521H01M8/1016Y02E60/50Y02P70/50
Inventor 彭开萍党琦王静任
Owner FUZHOU UNIV
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