Lanthanum molybdate based solid electrolyte film material and preparation thereof

A solid electrolyte and lanthanum molybdate-based technology, which is applied in chemical instruments and methods, molybdenum compounds, rare earth metal compounds, etc., can solve the problems that lanthanum molybdate-based materials cannot be obtained, production costs are difficult to reduce, and the scope of application is restricted. Achieve the effect of tight combination, low production cost and high density

Inactive Publication Date: 2009-01-21
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, both the lanthanum molybdate-based medium-temperature ionic conductor material and its preparation method have shortcomings. First, the lanthanum molybdate-based medium-temperature ionic conductor material is a ceramic block, and the grain size is too large. The scope of application is restricted, especially when it is used as a solid electrolyte, it is difficult to apply because it need

Method used

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  • Lanthanum molybdate based solid electrolyte film material and preparation thereof
  • Lanthanum molybdate based solid electrolyte film material and preparation thereof
  • Lanthanum molybdate based solid electrolyte film material and preparation thereof

Examples

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Embodiment 1

[0016]Embodiment 1: complete preparation successively according to the following steps: a) according to La 1.97 K 0.03 Mo 1.97 Fe 0.03 o 9-δ The composition ratio of the corresponding amount of lanthanum oxide, lanthanum dopant oxide or nitrate or acetate, ammonium molybdate [(NH 4 ) 6 Mo 7 o 24 ] and the oxide or nitrate or acetate of molybdenum dopant, wherein the nitrate of lanthanum dopant is potassium nitrate, and the nitrate of molybdenum dopant is iron nitrate. Dissolve lanthanum oxide in nitric acid, and prepare the others into corresponding aqueous solutions, firstly dissolve lanthanum nitrate [La(NO 3 ) 3 ] solution was added dropwise to the ammonium molybdate [(NH 4 ) 6 Mo 7 o 24 ] solution, and then add lanthanum dopant potassium nitrate solution and molybdenum dopant ferric nitrate solution to it to obtain a mixed solution. Next, citric acid was added to the mixed solution and then stirred, wherein the molar ratio of citric acid to the total metal ion...

Embodiment 2

[0017] Embodiment 2: complete preparation successively according to the following steps: a) according to La 1.97 K 0.03 Mo 1.97 Fe 0.03 o 9-δ The composition ratio of the corresponding amount of lanthanum oxide, lanthanum dopant oxide or nitrate or acetate, ammonium molybdate [(NH 4 ) 6 Mo 7 o 24 ] and the oxide or nitrate or acetate of molybdenum dopant, wherein the nitrate of lanthanum dopant is potassium nitrate, and the nitrate of molybdenum dopant is iron nitrate. Dissolve lanthanum oxide in nitric acid, and prepare the others into corresponding aqueous solutions, firstly dissolve lanthanum nitrate [La(NO 3 ) 3 ] solution was added dropwise to the ammonium molybdate [(NH 4 ) 6 Mo 7 o 24 ] solution, and then add lanthanum dopant potassium nitrate solution and molybdenum dopant ferric nitrate solution to it to obtain a mixed solution. Next, citric acid was added to the mixed solution and stirred, wherein the molar ratio of citric acid to the total metal ions in...

Embodiment 3

[0018] Embodiment 3: complete preparation successively according to the following steps: a) according to La 1.97 K 0.03 Mo 1.97 Fe 0.03 o 9-δ The composition ratio of the corresponding amount of lanthanum oxide, lanthanum dopant oxide or nitrate or acetate, ammonium molybdate [(NH 4 ) 6 Mo 7 o 24 ] and the oxide or nitrate or acetate of molybdenum dopant, wherein the nitrate of lanthanum dopant is potassium nitrate, and the nitrate of molybdenum dopant is iron nitrate. Dissolve lanthanum oxide in nitric acid, and prepare the others into corresponding aqueous solutions, firstly dissolve lanthanum nitrate [La(NO 3 ) 3 ] solution was added dropwise to the ammonium molybdate [(NH 4 ) 6 Mo 7 o 24 ] solution, and then add lanthanum dopant potassium nitrate solution and molybdenum dopant ferric nitrate solution to it to obtain a mixed solution. Next, citric acid was added to the mixed solution and then stirred, wherein the molar ratio of citric acid to the total metal io...

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Abstract

The invention discloses a lanthanum molybdate group solid electrolyte thin film material and a preparation method thereof. The material is a solid electrolyte polycrystalline thin film formed by covering a substrate with lanthanum molybdate group with the thickness between 50 nm and 10 mu m, and is formed by lanthanum molybdate group particles with the particle size between 10 and 90 nm. The method comprises the following steps: (a) according to the composition ratio of (La2-xAx)(Mo2-yBy)O9-delta, lanthanum oxide and lanthanum-site dopant oxide, nitrate or acetate, ammonium molybdate and molybdenum-site dopant oxide, nitrate or acetate are weighed and prepared into solution, and lanthanum nitrate solution, lanthanum-site dopant, molybdenum-site dopant solution and citric acid are orderly added to the ammonium molybdate solution under stirring, and then the ammonium molybdate solution is stirred for 2 to 10 hours at a temperature between 60 and 100 DEG C and then is filtered so as to obtain sol; (b) the sol is mixed with water-soluble high molecular polymer to obtain a coating colloid; and (c) the substrate coated with the coating colloid is heated to between 600 and 650 DEG C and has the heat insulated for 10 to 50 hours at a temperature between 550 and 660 DEG C, and then the material can be obtained. The material can be used as a solid electrolyte and an electrode material on a medium-temperature fuel battery or an oxygen sensor.

Description

technical field [0001] The present invention relates to a kind of film material and preparation method, especially a kind of lanthanum molybdate (La 2 Mo 2 o 9 ) based solid electrolyte film material and its preparation method. Background technique [0002] With the wide application of oxygen ion conductor materials in energy and electrochemical devices, it has become an urgent problem to develop middle and low temperature oxygen ion conductor materials with practical value. Recently, studies on bulk materials of lanthanum molybdate-based oxygen ion conductor materials have shown that such materials may be used as solid electrolytes and electrode materials in electrochemical devices such as intermediate temperature fuel cells and oxygen sensors. For this reason, people have made some attempts and various efforts, such as a kind of "lanthanum molybdate (La 2 Mo 2 o 9 )-based medium temperature ion conductor material and its preparation method”. It intends to provide a b...

Claims

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Application Information

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IPC IPC(8): C01G39/00C01F17/00
Inventor 王建新张德明王先平方前锋
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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