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Electrolyte for proton-conducting medium-temperature solid oxide fuel cell and preparation method thereof

A solid oxide and fuel cell technology, used in solid electrolyte fuel cells, fuel cells, circuits, etc., can solve the problems of poor battery sealing performance and high requirements for connecting body materials, and achieve light weight, small size, and good stability. Effect

Inactive Publication Date: 2019-04-02
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the operating temperature of SOFC that has been commercially used is generally 1000 ° C. Working at such a high temperature makes SOFC have many problems: densification of electrodes, high requirements for connector materials, and poor battery sealing performance.

Method used

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  • Electrolyte for proton-conducting medium-temperature solid oxide fuel cell and preparation method thereof

Examples

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Effect test

Embodiment 1

[0023] La 1.85 Mo 0.15 Ce 2 o 7+δ (LMC) preparation method

[0024] 1. La 1.85 Mo 0.15 Ce 2 o 7+δ The preparation method is:

[0025] 1) Press La 1.85 Mo 0.15 Ce 2 o 7+δ (0.1>δ>0) stoichiometric ratio weighs La(NO 3 ) 3 , Ce(NO 3 ) 3 ·6H 2 O, MoO 3 , and take citric acid as 1:1.5 by the mol ratio of metal cation and citric acid;

[0026] 2) Dilute the MoO with a mass concentration of 10%-15% ammonia water 3 dissolve;

[0027] 3) respectively in La(NO 3 ) 3 , Ce(NO 3 ) 3 ·6H 2 Add distilled water to dissolve in O and citric acid;

[0028] 4) Pour the solution obtained in step 2) and step 3) into the citric acid solution in turn, and add ammonia water with a mass concentration of 15%-20% to the solution dropwise to adjust the pH value of the solution to 7;

[0029] 5) Put the mixed solution obtained in step 4) into a stirrer and heat it to 70°C, then keep stirring continuously at 70°C, and add ammonia water during the stirring process to keep the pH val...

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Abstract

The invention provides proton conduction intermediate-temperature solid oxide fuel cell electrolyte and a preparation method thereof. Composition of the electrolyte is La1.85Mo0.15Ce2O<7+>delta, wherein delta is less than 0.1 and more than 0, a sol-gel combustion method is adopted for preparing the proton conduction intermediate-temperature solid oxide fuel cell electrolyte with high conductivity, and relative density reaches 99.9%; and the conductivity of the electrolyte reaches 0.057S / cm at the temperature of 700 DEG C in dry mixed atmosphere containing 5% of H2 and 95% of Ar.

Description

technical field [0001] The invention belongs to the field of electrolytes for batteries, and in particular relates to an electrolyte for a proton-conducting medium-temperature solid oxide fuel cell and a preparation method thereof. Background technique [0002] With the explosive growth of the number of human beings and the continuous improvement of the quality of human life, people's demand for energy is also increasing year by year, and the resulting environmental problems are increasingly affecting people's lives and even threatening people's lives and health. Therefore, how to use fossil fuels rationally and efficiently is one of the difficulties faced by human beings. [0003] 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 toxic gases and dust are avoided or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/10H01M8/1016
CPCH01M8/1016Y02E60/50
Inventor 彭开萍涂太平袁帆
Owner FUZHOU UNIV