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Zinc oxide-carbonate co-doped cerium barium zirconate proton conductor material and preparation method thereof

A technology of barium cerium zirconate and proton conductor, which is applied in the field of solid oxide fuel cells, can solve the problems of difficult production and application, difficulty in compatibility with high proton conductance and high stability, and reduced material density, and achieve broad market application prospects, The effect of good chemical stability and simple preparation method

Inactive Publication Date: 2013-02-27
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) Fuel is not easily diluted
An Infinite Solid Solution BaCe Combining the Two 1-x Zr x o 3-δ It has become the object of extensive research, but there are still many problems such as high sintering temperature, high proton conductance and high stability are difficult to be compatible.
However, due to problems such as the volatilization of inorganic salts during high-temperature sintering, the density of the material will decrease, which will cause certain difficulties in its production and application.

Method used

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  • Zinc oxide-carbonate co-doped cerium barium zirconate proton conductor material and preparation method thereof
  • Zinc oxide-carbonate co-doped cerium barium zirconate proton conductor material and preparation method thereof
  • Zinc oxide-carbonate co-doped cerium barium zirconate proton conductor material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] According to BaCe 0.4 Zr 0.4 Y 0.2 o 2.9 The stoichiometric ratio, take 1 mole of BaCO 3 , 0.4 mol CeO 2 , 0.4 mol ZrO 2 , 0.1 mole Y 2 o 3 , using absolute ethanol as the medium for ball milling for 8 hours, drying, grinding, sieving, and calcining at 1320°C for 10 hours to obtain cerium barium zirconate matrix powder doped with 10% yttrium oxide by mole. Then add 0.06 mole of ZnO and 0.02 mole of K to 1 mole of matrix powder 2 CO 3 , ball milling and mixing for 6 hours, after drying, grinding and sieving, put the mixed powder into a mold for dry pressing at a pressure of 50MPa, and then undergo isostatic pressing at 200MPa; the green body is sintered in air at 1350°C by buried firing , the heating rate was 5°C / min, and the temperature was kept for 5 hours, and then naturally cooled to room temperature to prepare BaCe 0.4 Zr 0.4 Y 0.2 o 2.9 -ZnO-K 2 CO 3 proton conductor material. Putting this proton conductor material into boiling water at 100°C for 10...

Embodiment 2

[0027] According to BaCe 0.5 Zr 0.3 Y 0.2 o 2.9 The stoichiometric ratio, weigh 1 mole of BaCO 3 , 0.5 mol CeO 2 , 0.3 mol ZrO 2 , 0.1 mole Y 2 o 3 , using absolute ethanol as the medium for ball milling for 8 hours, then drying, grinding and sieving, and calcining at 1300°C for 10 hours to obtain 10% mole yttrium oxide-doped cerium barium zirconate matrix powder. Then add 0.04 mol of ZnO and 0.005 mol of Na to 1 mol of matrix powder 2 CO 3 , mixed by ball milling for 6 hours, then dried, ground and sieved, then put the mixed powder into a mold for dry pressing at a pressure of 100MPa, and then undergo isostatic pressing at 200MPa; Sintering, heating rate 2°C / min, heat preservation for 2 hours, and then naturally cooling to room temperature to prepare BaCe 0.5 Zr 0.3 Y 0.2 o 2.9 —ZnO—Na 2 CO 3 proton conductor material. figure 2 It is the SEM photo of the cross-section of the proton conductor material after sintering. The proton conductor material was put int...

Embodiment 3

[0029] According to BaCe 0.6 Zr 0.2 Y 0.2 o 2.9 The stoichiometric ratio, weigh 1 mole of BaCO 3 , 0.6 mol CeO 2 , 0.2 mol ZrO 2 , 0.1 mole Y 2 o 3 , using absolute ethanol as the medium for ball milling for 8 hours, drying, grinding and sieving, and calcining at 1250°C for 15 hours to obtain cerium barium zirconate matrix powder doped with 10% yttrium oxide by mole. Then add 0.01 mole of ZnO and 0.03 mole of Li to 1 mole of matrix powder 2 CO 3 , ball milled and mixed for 5 hours, then dried, ground and sieved, the mixed powder was put into a mold for dry pressing at a pressure of 50MPa, and then subjected to 250MPa isostatic pressing; the green body was sintered in air at 1300°C by buried firing , the heating rate was 1°C / min, the temperature was kept for 6 hours, and then naturally cooled to room temperature to prepare BaCe 0.6 Zr 0.2 Y 0.2 o 2.9 -ZnO-Li 2 CO 3 proton conductor material. The proton conductor material was put into a carbon dioxide atmosphere ...

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Abstract

The invention relates to a zinc oxide-carbonate co-doped cerium barium zirconate proton conductor material and a preparation method thereof, belonging to the field of solid oxide fuel cells. The method disclosed herein comprises the following steps: firstly synthesizing yttrium oxide-doped cerium barium zirconate proton conductor powder by solid phase method, then mixing with zinc oxide and carbonate or composite carbonate, conducting dry pressing and isostatic compaction, then conducting high temperature burying sintering to obtain the zinc oxide-carbonate co-doped cerium barium zirconate proton conductor material. An anode-supported electrolyte part is prepared by lamination co-press technology, then a Ba0.5Sr0.5Co0.8Fe0.2O2.9 cathode slurry is coated on one side of the electrolyte, and an anode-supported unit cell is assembled to test. According to the invention, the invention provides a preparation method of a medium and low temperature solid oxide fuel cell electrolyte material, has the characteristics of low cost of raw materials and preparation and simple process, on the premise that the conductivity of the material is guaranteed at medium and low temperature, the material has good chemical stability, the unit cell has good output performance, and the method lays a foundation for developing solid oxide fuel cells.

Description

technical field [0001] The invention belongs to the technical field of solid oxide fuel cells, and relates to a zinc oxide-carbonate co-doped cerium barium zirconate proton conductor material and a preparation method thereof. Background technique [0002] As a new type of power generation device, solid oxide fuel cell (SOFC) has attracted widespread attention in recent years due to its high efficiency, pollution-free, all-solid-state structure, and wide adaptability to a variety of fuel gases. The electrolyte is one of the most critical components in the SOFC system, and the performance of the electrolyte directly determines the performance and life of the SOFC. The traditional SOFC electrolyte uses oxygen ions as the main conduction mechanism, and the typical representative is Y 2 o 3 Stabilized ZrO 2 (YSZ). However, its high working temperature (over 800°C) has brought many problems such as sealing, material matching, working stability, and production cost. In the 198...

Claims

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Application Information

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IPC IPC(8): C04B35/50C04B35/63C04B35/622H01M8/12H01M8/1246
CPCY02E60/521Y02E60/525Y02E60/50Y02P70/50
Inventor 郭瑞松李永刘崇威安静
Owner TIANJIN UNIV
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