High conductivity nanometer complex phase perovskite type proton conductor

A proton conductor and perovskite-type technology, which is applied in the field of ceramic materials, can solve the problems such as the inconspicuous conductivity of multiphase electrolytes, and achieve good sinterability, reasonable steps, and optimized parameters.

Inactive Publication Date: 2012-07-25
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the conductivity of the composite electrolyte composed of perovskite-type proton conductors and inorganic salts is not significantly improved by using the solid-state reaction method, the present invention provides a high-conductivity nano-composite-phase perovskite-type proton conductor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The fabrication steps of the highly conductive nano-composite perovskite-type proton conductor are as follows,

[0015] (1) Use metal salt raw materials to make gels, and each part of metal salt raw materials includes 1 mole of Ba(NO 3 ) 2 , y moles of Zr(NO 3 ) 4 ·5H 2 O, x moles of Y(NO 3 ) 3 ·6H 2 O and (1-x-y) moles of Ce(NO 3 ) 3 ·5H 2 0, wherein x is 0.05, and y is 0.2, and each part of metal salt raw material utilizes deionized water to make it dissolve completely, then adds 6 moles of citric acid as a chelating agent, utilizes ammonia water to adjust the pH value of the mixed solution to 7, and makes The volume of the solution reached 500ml, then heated to 85°C, 20g of acrylamide monomer was added, 2g of N,N'-methylenebisacrylamide was added as a cross-linking agent, and 8g of ammonium sulfate was added as an initiator to obtain a transparent gel ;

[0016](2) After the gel was heated in a microwave oven for 15 minutes, it was ground until mixed evenl...

Embodiment 2

[0020] The fabrication steps of the highly conductive nano-composite perovskite-type proton conductor are as follows,

[0021] (1) Use metal salt raw materials to make gels, and each part of metal salt raw materials includes 1 mole of Ba(NO 3 ) 2 , y moles of Zr(NO 3 ) 4 ·5H 2 O, x moles of Y(NO 3 ) 3 ·6H 2 O and (1-x-y) moles of Ce(NO 3 ) 3 ·5H 2 0, wherein x is 0.1, and y is 0.3, and each part of metal salt raw material utilizes deionized water to make it dissolve completely, then adds 7 moles of citric acid as a chelating agent, utilizes ammonia water to adjust the pH value of the mixed solution to 5, and makes The volume of the solution reaches 500ml, then heated to 90°C, add 20g of acrylamide monomer, 2g of N,N'-methylenebisacrylamide as a cross-linking agent, and 8g of ammonium sulfate as an initiator, and the reaction results in a transparent gel ;

[0022] (2) After the gel was heated in a microwave oven for 15 minutes, it was ground until mixed evenly, and ...

Embodiment 3

[0026] The fabrication steps of the highly conductive nano-composite perovskite-type proton conductor are as follows,

[0027] (1) Use metal salt raw materials to make gels, and each part of metal salt raw materials includes 1 mole of Ba(NO 3 ) 2 , y moles of Zr(NO 3 ) 4 ·5H 2 O, x moles of Y(NO 3 ) 3 ·6H 2 O and (1-x-y) moles of Ce(NO 3 ) 3 ·5H 2 0, wherein x is 0.15, and y is 0.4, and each part of metal salt raw material utilizes deionized water to make it completely dissolved, then adds 8 moles of citric acid as a chelating agent, utilizes ammonia water to adjust the pH value of the mixed solution to 6, and makes The volume of the solution reached 500ml, then heated to 95°C, added 20g of acrylamide monomer, 2g of N,N'-methylenebisacrylamide as a crosslinking agent, and 8g of ammonium sulfate as an initiator, and the reaction resulted in a transparent gel ;

[0028] (2) After the gel was heated in a microwave oven for 15 minutes, it was ground until mixed evenly, ...

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Abstract

The invention specifically relates to a nanometer complex phase perovskite type proton conductor and solves the problem of insignificant improvement of conductivity of complex phase electrolyte composed of the perovskite-type proton conductor and inorganic salt with a solid state reaction method. A preparation method of the nanometer complex phase perovskite type proton conductor comprises the following steps: adding a chelator, a crosslinking agent and an initiating agent to a metal salt raw material to conduction the reaction so as to obtain gel; heating, grinding and calcining the gel to obtain pure BaCe1-x-yZryYxO3-x / 2 nanometer powder; adding the BaCe1-x-yZryYxO3-x / 2 nanometer powder to Na2CO3 solution for stirring at a high speed; heating for evaporating moisture; and sintering nanometer complex phase powder with BaCe1-x-yZryYxO3-x / 2 coated by Na2CO3 to obtain a dense material. According to the preparation method, the steps are reasonable, the parameter is optimized, and the conductivity of the proton conductor can reach 7.54*10<2> to 9.67*10<2>S / cm. The preparation method has practical value.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a high-conductivity nano-complex perovskite-type proton conductor. Background technique [0002] Perovskite-type proton conductors are a new type of fast ion conductor materials, which can be widely used in solid oxide fuel cell (SOFC) electrolyte materials, hydrogen sensors, hydrogen separation, etc. Among many perovskite-type proton conductor materials, BaCeO 3 Proton conductors have very good electrical conductivity, but below 600 °C, they contain high concentrations of CO 2 and H 2 O environment is unstable; while BaZrO 3 proton conductor in CO 2 and H 2 O environment has very good chemical stability, mechanical properties and grain conductivity, but the difficult sintering and high grain boundary resistance of this material hinder the practical application of this material. In terms of how to improve the sinterability, proton conductivity and chemical stabi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/50C04B35/628
CPCY02E60/50Y02P70/50
Inventor 王延忠刘炜董英鸽胡胜亮常青杨金龙
Owner ZHONGBEI UNIV
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