Oxygen ion conduction medium temperature solid oxide fuel cell electrolyte

A solid oxide, oxygen ion conduction technology, used in fuel cells, electrolytes, circuits, etc., can solve problems such as high requirements for connector materials, limited commercial development, and poor battery sealing performance, and achieve high conductivity and high power. The effect of density

Inactive Publication Date: 2017-07-07
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The working temperature of traditional SOFC is generally 1000°C. Working at such a high temperature makes SOFC have many problems: densification of electrode

Method used

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  • Oxygen ion conduction medium temperature solid oxide fuel cell electrolyte
  • Oxygen ion conduction medium temperature solid oxide fuel cell electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Ce 0.87 La 0.11 Ni 0.02 o 2-α The preparation method of (CLNO)

[0028] 1. Ce 0.87 La 0.11 Ni 0.02 o 1.9 Preparation

[0029] 1) Accurately weigh the raw material Ce(NO 3 ) 3 ·6H 2 O, La(NO 3 ) 3 ·nH 2 O, Ni(NO 3 ) 3 ·6H 2 O, the complexing agent citric acid is weighed according to [n(CA):n(metal cation)=1.5:1].

[0030] 2) Ce(NO 3 ) 3 ·6H 2 O,La(NO 3 ) 3 ·nH 2 O, Ni(NO 3 ) 3 ·6H 2 O and citric acid were dissolved in deionized water respectively;

[0031] 3) Mix the above solutions and stir well

[0032] 4) Put the mixed solution obtained in step 3) into a stirrer and heat to 45°C, stir continuously at 45°C, and keep the pH value of the solution at 7 by adding ammonia water during the stirring process until a gel is formed;

[0033] 5) Move the gel into an evaporating dish and heat it on an electric furnace until self-propagating combustion occurs to form a fluffy oxide powder;

[0034] 6) Calcining at 600°C±10°C for 30±5 minutes to remove o...

Embodiment 2

[0058] Preparation of discs: Put the CLNO-LSB powder prepared in Example 1 into a mold, and under a pressure of 300 MPa, make discs with a diameter of 13 mm ± 0.1 mm and a thickness of 0.5 mm ± 0.1 mm. Heating at a heating rate of 3°C per minute to 1200°C±10°C for 4±0.1 hours to obtain the required electrolyte disc.

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Abstract

Belonging to the field of solid electrolyte preparation, the invention in particular relates to an oxygen ion conduction medium temperature solid oxide fuel cell electrolyte. The invention adopts a nitrate gel combustion method to prepare the medium temperature solid oxide fuel cell electrolyte, which is a Ce0.87La0.11Ni0.02O2-alpha-Bi1.55La0.45O3 composite electrolyte, wherein alpha is greater than 0 and smaller than or equal to 0.075. The relative density reaches 98% or more. The ionic conductivity of the electrolyte reaches 1.88*10<-2>S/cm at 700DEG C in an air atmosphere.

Description

technical field [0001] The invention belongs to the field of solid electrolyte preparation, and in particular relates to an oxygen ion-conducting medium-temperature solid oxide fuel cell electrolyte. Background technique [0002] With the development of global industry and the rapid growth of population, the resources on the earth will become more and more scarce. The traditional power generation methods mostly convert the chemical energy in fossil energy such as oil and natural gas into heat energy through combustion, and then use the heat energy to drive mechanical equipment to generate mechanical energy, and finally convert it into electrical energy. This energy conversion is not only limited by the Carnot cycle, but also produces a large amount of dust, carbon dioxide, nitrogen oxides and sulfides and other harmful substances and noise. Therefore, seeking a new energy technology with high energy conversion efficiency and environmental friendliness is the key to the deve...

Claims

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Application Information

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IPC IPC(8): H01M8/126H01M8/1246
CPCH01M8/126H01M8/1266H01M2008/1293H01M2300/0091Y02E60/50Y02P70/50
Inventor 彭开萍刘建
Owner FUZHOU UNIV
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