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Low-temperature preparation method of oxidapatite-structure lanthanum germanium acid electrolyte material powder body

An electrolyte material and oxyapatite technology are applied in the field of medium temperature solid oxide fuel cell electrolyte material preparation to achieve the effects of less energy consumption, low preparation temperature and simple preparation process

Inactive Publication Date: 2012-08-15
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] oxyapatite structure La 9.33+x Ge 6 o 26+1.5x (0≤x≤0.27) low-temperature NaCl molten salt preparation method of electrolyte powder has not been reported

Method used

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  • Low-temperature preparation method of oxidapatite-structure lanthanum germanium acid electrolyte material powder body
  • Low-temperature preparation method of oxidapatite-structure lanthanum germanium acid electrolyte material powder body
  • Low-temperature preparation method of oxidapatite-structure lanthanum germanium acid electrolyte material powder body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 5.8463g lanthanum oxide (La 2 o 3 ) and 2.4136g germanium oxide (GeO 2 ) (molar ratio is 9.33: 12) is put into 250ml agate ball mill jar, then 24.7797g sodium chloride (NaCl) (initial reaction raw material total mass and sodium chloride mass ratio is 1: 3) is put into agate ball mill jar , and inject an appropriate amount of absolute ethanol; the mixture is ball-milled with a planetary ball mill, the speed of the ball mill is 400 rpm, and the time is 8 hours; the mixture of the ball-milled raw material and molten salt is imported into a 250ml beaker and put into a drying box Drying inside, the drying temperature is 110°C, and the drying time is 24 hours; the mixture of dried raw materials and molten salt is placed in a muffle furnace with a crucible, and sintered at a temperature of 900°C for 4 hours; sintering After La 9.33 Ge 6 o 26 Electrolyte powder and sodium chloride mixture, use deionized water to wash La 9.33 Ge 6 o 26 The sodium chloride mixed in the el...

Embodiment 2

[0030] 5.9716g lanthanum oxide (La 2 o 3 ) and 2.4136g germanium oxide (GeO 2 ) (mol ratio is 9.53: 12) is put into 250ml agate ball mill jar, then 25.1556g sodium chloride (NaCl) (raw material total mass and sodium chloride mass ratio is 1: 3) is put into agate ball mill jar, and Inject an appropriate amount of absolute ethanol; use a planetary ball mill to carry out ball milling on the mixture, the speed of ball milling is 400 rpm, and the time is 8 hours; the mixture of ball milled raw materials and molten salt is imported into a 250ml beaker, and put into a drying oven for drying dry, the drying temperature is 110°C, and the drying time is 24 hours; the mixture of dried raw materials and molten salt is placed in a muffle furnace with a crucible, and sintered at a temperature of 900°C for 4 hours; the sintered La 9.53 Ge 6 o 26.3 Electrolyte powder and sodium chloride mixture, use deionized water to wash La 9.53 Ge 6 o 26.3 The sodium chloride mixed in the electroly...

Embodiment 3

[0032] 5.8463g lanthanum oxide (La 2 o 3 ) and 2.4136g germanium oxide (GeO 2 ) (mol ratio is 9.33: 12) is put into 250ml agate ball mill jar, then 24.7797g sodium chloride (NaCl) (raw material total mass and sodium chloride mass ratio is 1: 3) is put into agate ball mill jar, and Inject an appropriate amount of absolute ethanol; use a planetary ball mill to carry out ball milling on the mixture, the speed of ball milling is 400 rpm, and the time is 8 hours; the mixture of ball milled raw materials and molten salt is imported into a 250ml beaker, and put into a drying oven for drying dry, the drying temperature is 110°C, and the drying time is 24 hours; the mixture of dried raw materials and molten salt is put into a muffle furnace with a crucible, and sintered at a temperature of 1000°C for 4 hours; the sintered La 9.33 Ge 6 o 26 Electrolyte powder and sodium chloride mixture, use deionized water to wash La 9.33 Ge 6 o 26 The sodium chloride mixed in the electrolyte p...

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Abstract

The invention relates to a low-temperature preparation method of an oxidapatite-structure lanthanum germanium acid electrolyte material powder body, belonging to the technical field of preparation of middle-temperature solid oxide fuel cell electrolyte materials. The low-temperature preparation method comprises the following steps of: with lanthanum oxide and germanium oxide as reaction raw materials and sodium chloride as molten salt, mixing the reaction raw materials and the molten salt, adding absolute ethyl alcohol and carrying out ball milling; sintering at 900-1,000 DEG C for 4-12h after drying a ball-milled mixture of the reaction raw materials and the molten salt; and washing the sintered products with deionized water and drying to obtain the oxidapatite-structure lanthanum germanium acid electrolyte material powder body. According to the low-temperature preparation method disclosed by the invention, the prepared La9.33+xGe6O26+1.5x powder body has the advantages of small diameter, uniform distribution without agglomeration and high phase purity; and the preparation method has the advantages of low temperature, short time, small energy consumption, simpleness in process, low cost, low dependency on equipment, easiness in salt separation and high reusability, and is suitable for industrial application.

Description

technical field [0001] The invention belongs to the technical field of preparation of medium-temperature solid oxide fuel cell electrolyte materials. Involved in the oxyapatite structure La 9.33+x Ge 6 o 26+1.5x (0≤x≤0.27) the preparation method of electrolyte powder, with lanthanum oxide (La 2 o 3 ) and germanium oxide (GeO 2 ) is an initial reaction raw material, and sodium chloride (NaCl) is a molten salt prepared at a low temperature by a molten salt method. Background technique [0002] The research, development and application of intermediate temperature solid oxide fuel cell (IT-SOFC) is a frontier topic for developing low-carbon economy, solving energy shortage and promoting sustainable development of resources. ~800°C) new solid electrolyte material is the key to realize SOFC intermediate temperature. Recently synthesized with low activation energy (<1eV) and high oxygen ion conductivity (>0.01S cm -1 ) oxyapatite-structured lanthanum germanate electro...

Claims

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Application Information

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IPC IPC(8): H01M8/10H01M8/12
CPCY02E60/50
Inventor 高伟尹广超仲林红谢晓君丛日东黄大海孙美玲崔啟良姜殿武
Owner JILIN UNIV
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