Preparation method of electrolyte material for medium-temperature solid fuel cell

A technology for solid fuel cells and electrolyte materials, applied in fuel cells, circuits, electrical components, etc., can solve the problems of low conductivity, poor sintering performance and sintering density, and improve ionic conductivity, increase crystal phase, promote cleaning effect

Active Publication Date: 2018-06-29
湖州达立智能设备制造有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention: Aiming at the problems of poor sintering performance, sintering density and low c

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  • Preparation method of electrolyte material for medium-temperature solid fuel cell

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Example Embodiment

[0022] Example 1

[0023] Take 1.8g of gadolinium oxide and 1.7g of samarium oxide, add it to 100g of nitric acid solution with a mass fraction of 20%, stir at 300r / min for 15min, then add 34.7g of cerium nitrate hexahydrate, continue stirring until the solid is completely dissolved, then add 9.6g of citric acid , 2.9g ethylenediaminetetraacetic acid, after stirring and mixing evenly, add dropwise a 5% sodium hydroxide solution until the pH is 8, and let it stand for 15 hours to obtain a reaction solution, which is transferred to a tank with a Teflon liner In a hydrothermal kettle, carry out a hydrothermal reaction at 120°C, the hydrothermal reaction time is 10h, cool to room temperature and filter to obtain a filter residue, wash the filter residue twice with absolute ethanol, then wash twice with deionized water, and then place In a drying oven, dry at 120°C to a constant weight to obtain a precursor. Put the precursor in a muffle furnace and ignite it to generate a self-pro...

Example Embodiment

[0024] Example 2

[0025] Take 2.3g of gadolinium oxide and 2.2g of samarium oxide, add 125g of nitric acid solution with a mass fraction of 20%, stir at 350r / min for 17min, then add 43.7g of cerium nitrate hexahydrate, continue stirring until the solid is completely dissolved, then add 12g of citric acid, 3.6g of ethylenediaminetetraacetic acid, after stirring and mixing evenly, add dropwise a 5% sodium hydroxide solution until the pH is 8.5, and let it stand for 17 hours to obtain a reaction solution, which is transferred to a water tank with a Teflon liner. In a hot kettle, carry out hydrothermal reaction at 150°C. The hydrothermal reaction time is 11 hours. After cooling to room temperature, filter the filter residue. Wash the filter residue with absolute ethanol for 2 times, then wash it with deionized water for 3 times, and then place it in a dry place. In the oven, dry at 135°C to constant weight to obtain the precursor. Put the precursor in a muffle furnace and ignite ...

Example Embodiment

[0026] Example 3

[0027] Take 2.7g of gadolinium oxide and 2.6g of samarium oxide, add it to 150g of nitric acid solution with a mass fraction of 20%, stir at 400r / min for 20min, then add 52.1g of cerium nitrate hexahydrate, continue stirring until the solid is completely dissolved, then add 14.4g of citric acid , 4.4g of ethylenediaminetetraacetic acid, after stirring and mixing evenly, add dropwise a mass fraction of 5% sodium hydroxide solution to a pH of 9, leave it for 20 hours to obtain a reaction solution, and transfer the reaction solution to a tank with a Teflon liner In a hydrothermal kettle, carry out a hydrothermal reaction at 180°C. The hydrothermal reaction time is 12 hours. After cooling to room temperature, filter the filter residue, wash the filter residue 3 times with absolute ethanol, then wash 3 times with deionized water, and then place In a drying oven, dry at 150°C to a constant weight to obtain a precursor. Put the precursor in a muffle furnace and ign...

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Abstract

The invention relates to a preparation method of an electrolyte material for a medium-temperature solid fuel cell, and belongs to the technical field of new energy sources. Based on the characteristics of higher oxygen ion conductivity of the cerium-oxide-doped electrolyte at a relatively low temperature as well as better chemical compatibility and mechanical matching property with a high-performance cathode material at sintering and working temperatures, the electrolyte material of the cell is formed by doping rare earth elements such as cerium, gadolinium and the like, the oxygen vacancy concentration of the cell is greatly increased, and accordingly, the ion conductivity of the cell is improved; the crystal size of the material is reduced at a lower synthesis temperature, and the sintering performance and the sintering density of the material are improved, so that the oxygen ion conduction of the electrolyte is ensured; the average crystal size of the electrolyte is reduced by compounding titanium dioxide and strontium oxide, particles of the electrolyte are homogenized, the whole electrolyte can be more densified, the ionic conductivity is improved, and the output power of thesingle cell supported by the electrolyte is further improved.

Description

technical field [0001] The invention relates to a method for preparing an electrolyte material for a medium-temperature solid fuel cell, and belongs to the technical field of new energy sources. Background technique [0002] As a pure, stable and efficient energy conversion device, solid fuel cell (SOFC) has become one of the important technical means to effectively solve the energy crisis and environmental pollution problems. Solid oxygen ion conductor is used as the electrolyte material of SOFC, and its properties such as operating temperature, stability, and energy conversion efficiency all have an important impact on the application of SOFC. The basic requirements of solid electrolyte materials are: must have high ionic conductivity and low electronic conductivity; good stability in fuel and oxidizing atmosphere; no chemical reaction with adjacent components; dense and Element thermal expansion coefficient matching. At present, the electrolyte materials used in SOFC ar...

Claims

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Application Information

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IPC IPC(8): H01M8/1016
CPCH01M8/1016Y02E60/50
Inventor 唐林元王文新史玉玲
Owner 湖州达立智能设备制造有限公司
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