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A kind of medium temperature solid oxide fuel cell electrolyte and preparation method thereof

A solid oxide, fuel cell technology, used in fuel cells, circuits, electrical components, etc., can solve the problem that the electrolyte is not suitable for medium and low temperature conditions, and achieve the effect of high power density and high conductivity

Inactive Publication Date: 2019-08-09
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A kind of medium temperature solid oxide fuel cell electrolyte and preparation method thereof
  • A kind of medium temperature solid oxide fuel cell electrolyte and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0025] 1.Ce 0.85 La 0.11 In 0.04 O 2-δ (0<δ≤0.075)(CLIO) Preparation method:

[0026] 1) Accurately weigh the raw material Ce(NO 3 ) 3 ·6H 2 O, La(NO 3 ) 3 ·NH 2 O, In(NO 3 ) 3 ·4.5H 2 O, the complexing agent citric acid is weighed according to [n(CA):n(metal cation)=1.5:1];

[0027] 2) Ce(NO 3 ) 3 ·6H 2 O, La(NO 3 ) 3 ·NH 2 O, In(NO 3 ) 3 ·4.5H 2 O and citric acid were dissolved in deionized water, mixed the above solutions and stirred evenly;

[0028] 3) Add dropwise ammonia (ammonia concentration 15%-20%) to adjust the pH to 7.

[0029] 4) Put the mixed solution obtained in step 3) into a stirrer and heat to 45°C, stir continuously at 45°C, and add ammonia water during the stirring process to keep the pH of the solution at 7 until a gel is formed;

[0030] 5) Move the gel into the evaporating dish and heat it on the electric stove until self-propagating combustion occurs to form fluffy oxide powder;

[0031] 6) Calcining at 600℃±10℃ for 30±5 minutes to remove organic matter, then calc...

Embodiment 2

[0055] Preparation of the disc: Put the CLIO-ESB powder prepared in Example 1 into a mold, and under a pressure of 300 MPa, make a disc 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 1300°C±10°C for 4±0.1 hours to obtain the required electrolyte disc.

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Abstract

The invention belongs to the technical field of the solid electrolytes, and particularly relates to a medium temperature solid oxide fuel cell electrolyte and a preparation method thereof. According to the method, the medium temperature solid oxide fuel cell electrolyte is prepared by adopting nitrate gel burning method, the electrolyte is a composite electrolyte of Ce0.85La0.11In0.04O2-delta-Bi1.5Er0.5O3, wherein the delta is larger than zero and smaller than or equal to 0.075. The relative density of the electrolyte is above 97%; the ionic conductivity of the electrolyte can reach 1.71*10<2> S / cm at the temperature of 700 DEG C under the atmosphere of the air.

Description

Technical field [0001] The invention belongs to the field of preparation of solid electrolytes, and specifically relates to a medium temperature solid oxide fuel cell electrolyte and a preparation method thereof. Background technique [0002] Energy is the lifeblood of a country's national economic development, as well as an important indicator to measure the degree of civilization development, people's living standards, and the country's comprehensive national strength. In recent years, my country's national strength has grown by leaps and bounds, and the demand for energy has also increased dramatically. At present, more fossil fuels (such as petroleum and coal) are not only low in combustion efficiency, which will pollute the environment and unsustainable development. Therefore, the development demand for new energy is urgent. The solid oxide fuel cell (SOFC) directly converts the chemical energy in the fossil fuel into electrical energy through the electrochemical reaction p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/126H01M8/1246
CPCH01M8/126H01M8/1266H01M2008/1293Y02E60/50
Inventor 彭开萍刘建
Owner FUZHOU UNIV