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High-performance solid electrolyte and preparation method thereof

A solid electrolyte, high-performance technology, applied in the field of electrochemical materials, can solve the problems of poor chemical stability and high temperature stability, low electrolyte density, narrow proton conductivity range, etc., to achieve high corrosion resistance, good chemical stability, Effect of high temperature stability and chemical stability

Active Publication Date: 2019-08-27
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] An object of the present invention is to provide a high-performance solid electrolyte to solve the problems of low electrolyte density, low electrical conductivity, narrow proton conductivity range, low proton migration number, poor chemical stability and high temperature stability in existing solid electrolytes.

Method used

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  • High-performance solid electrolyte and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Weigh a certain amount of analytically pure CaCO 3 and rare earth oxide Sc 2 o 3 , placed in a corundum sagger with a cover, placed in a high-temperature furnace, raised to 500°C at a heating rate of 4°C / min, kept for 4 hours, and dried to dry the moisture in the raw material, then cooled to room temperature with the furnace, passed through agate The powder is obtained after mortar grinding. In addition, weigh a certain amount of analytically pure HfO 2Put it in a corundum sagger with a cover, put it into a high-temperature furnace, raise the temperature to 1100°C at a rate of 4°C / min, keep it warm for 4 hours, dry the moisture in the raw material, and perform high-temperature treatment on the raw material, and then cool it with the furnace After reaching room temperature, the powder was obtained after being ground in an agate mortar for later use.

[0050] CaCO in molar ratio 3 : Hf 2 o 3 : Sc 2 o 3 = The ratio of 20:9:1, weighed an appropriate amount of dried...

Embodiment 2

[0056] Weigh a certain amount of analytically pure CaCO 3 and rare earth oxide Lu 2 o 3 , respectively placed in a corundum sagger with a cover, placed in a high-temperature furnace, raised to 600°C at a heating rate of 5°C / min, kept for 5 hours, and dried to dry the moisture in the raw material, then cooled to room temperature with the furnace, and passed through agate The powder is obtained after mortar grinding. In addition, weigh a certain amount of analytically pure HfO 2 Put it in a corundum sagger with a cover, put it into a high-temperature furnace, raise the temperature to 1200°C at a heating rate of 5°C / min, keep it warm for 5 hours, dry the moisture in the raw material, and perform high-temperature treatment on the raw material, and then cool it with the furnace After reaching room temperature, the powder was obtained after being ground in an agate mortar for later use.

[0057] CaCO in molar ratio 3 : Hf 2 o 3 : Lu 2 o 3 = The ratio of 20:8.5:1.5, take an ...

Embodiment 3

[0063] Weigh a certain amount of analytically pure CaCO 3 and rare earth oxide Yb 2 o 3 , respectively placed in a corundum sagger with a cover, placed in a high-temperature furnace, raised to 700°C at a heating rate of 6°C / min, kept for 4 hours, and dried to dry the moisture in the raw material, then cooled to room temperature with the furnace, and passed through agate The powder is obtained after mortar grinding. In addition, weigh a certain amount of analytically pure HfO 2 Put it in a corundum sagger with a cover, put it into a high-temperature furnace, raise the temperature to 1200°C at a heating rate of 6°C / min, keep it warm for 6 hours, dry the moisture in the raw material, and perform high-temperature treatment on the raw material, and then cool with the furnace After reaching room temperature, the powder was obtained after being ground in an agate mortar for later use.

[0064] CaCO in molar ratio 3 : Hf 2 o 3 : Yb 2 o 3 = The ratio of 20:8:2, take an appropr...

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Abstract

The invention relates to a high-performance solid electrolyte and a preparation method thereof. The chemical expression of the electrolyte is CaHf(1-x)RExO(3-a), wherein the high-performance solid electrolyte is prepared by using CaCO3, HfO2 and an rare earth oxide RE2O3 as raw materials and adopting a technical route including pretreatment, material preparation, pre-grinding, pre-sintering, crushing, final grinding and final sintering. The electrolyte has the advantages of high density, high conductivity, large proton migration number, wide proton conductivity range, high temperature stability, high chemical stability and high corrosion resistance and has excellent comprehensive performance. The electrolyte is used in the technical fields of electrochemical hydrogen sensors, solid oxide fuel cells, hydrogen and heavy hydrogen extraction preparation, hydrogen isotope concentration, organic hydrogenation and dehydrogenation, electrochemical synthesis of ammonia and methanol and the like. The problems can be solved that existing solid electrolytes have low density, narrow proton conduction range, small proton migration number, low chemical stability, poor high temperature stability and the like.

Description

technical field [0001] The invention relates to the technical field of electrochemical materials, in particular to a high-performance solid electrolyte and a preparation method thereof. Background technique [0002] Since the early 1980s, rare-earth-doped perovskite-structured solid electrolytes were found to be proton-conductive in high-temperature water vapor or hydrogen-containing atmospheres, and have been recognized for their high chemical stability and good proton conductivity. In recent years, with the in-depth development of solid electrolyte-related theories and technologies, perovskite-type solid electrolytes have been widely used in electrochemical hydrogen sensors, solid oxide fuel cells, extraction and preparation of hydrogen and deuterium, hydrogen isotope Concentration, hydrogenation and dehydrogenation of organic matter, electrochemical synthesis of ammonia and methanol and other technical fields have shown great application value and broad development prospe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/626
CPCC04B35/48C04B35/62605C04B2235/3224C04B2235/3248C04B2235/442
Inventor 包金小阮飞刘国奇谢敏郜建全周芬关丽丽宋希文安胜利
Owner INNER MONGOLIA UNIV OF SCI & TECH
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