Preparation method of Na-beta''-Al2O3 solid electrolyte

A solid electrolyte and mixed solution technology, applied in circuits, electrical components, battery pack components, etc., can solve problems such as reducing ionic conductivity, and achieve the effects of inhibiting grain growth, good selectivity, and shortening sintering time

Inactive Publication Date: 2010-06-16
NANJING UNIV OF TECH
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  • Summary
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Problems solved by technology

In traditional synthetic methods, in order to obtain highly dense Na-β″-Al 2 o 3 Electrolyte, usually requires a long time heat preservation under the condition of higher than 1580 ℃, long time high temperature heat treatment will cause Na-β″-Al 2 o 3 in Na 2 A large amount of volatilization of O, thereby reducing its ionic conductivity

Method used

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  • Preparation method of Na-beta''-Al2O3 solid electrolyte
  • Preparation method of Na-beta''-Al2O3 solid electrolyte
  • Preparation method of Na-beta''-Al2O3 solid electrolyte

Examples

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Embodiment 1

[0021] Al(NO 3 ) 3 9H 2 O(A.R.), NaNO 3 (A.R.) and Mg(NO 3 ) 2 (A.R.) is the raw material, the polymer compound is citric acid (A.R.), and polyethylene glycol is used as the dispersant. Weigh 25.8g of aluminum nitrate, 0.95g of sodium nitrate, and 0.66g of magnesium nitrate, add 45ml of distilled water, heat and stir at a constant temperature of 60°C to form a uniform solution. Then add 16.9g citric acid therein, and the polyethylene glycol of 2.45g, continue to heat and stir, form wet gel gradually through 8 hours. The obtained wet gel was dried in an oven at 200° C. to obtain a dry gel. Then the gel was calcined at 1250°C for 2 hours, the heating rate was 3°C / min, and kept at 600°C for 2 hours, so as to facilitate the full decomposition of organic matter and obtain ultrafine powder. The powder was ball-milled for 8 hours with absolute ethanol as the medium, dried, and sieved. The obtained powder is isostatically pressed at 300MPa into a disc with a diameter of 20mm. ...

Embodiment 2

[0023] Al(NO 3 ) 3 9H 2 O(A.R.), NaNO 3 (A.R.) and Mg(NO 3 ) 2 (A.R.) is the raw material, the polymer compound is citric acid (A.R.), and polyvinyl alcohol is used as the dispersant. Weigh 38.74g of aluminum nitrate, 1.42g of sodium nitrate, and 0.99g of magnesium nitrate, add 50ml of distilled water, heat and stir at a constant temperature of 80°C to form a uniform solution. Then add 25.36g citric acid therein, and the polyvinyl alcohol of 2.79g, continue to heat and stir, form wet gel gradually through 6 hours. The obtained wet gel was dried in an oven at 250° C. to obtain a dry gel. Then the gel was calcined at 850°C for 3 hours, the heating rate was 2°C / min, and kept at 500°C for 2 hours, so as to facilitate the full decomposition of organic matter and obtain ultrafine powder. The powder was ball-milled for 5 hours with absolute ethanol as the medium, dried, and sieved. The obtained powder is isostatically pressed at 300MPa into a disc with a diameter of 20mm. In ...

Embodiment 3

[0025] Weigh Al 2 o 3 8.94g, Na 2 CO 3 1.78g, Li 2 CO 3 0.056g, put it into an agate jar, use absolute alcohol as the medium, mix and ball mill for 15 hours, pass through a 200-mesh sieve, dry in an oven at 80°C, and isostatically press the obtained powder into a disc with a diameter of 20mm at 300MPa Put it into a microwave sintering furnace, raise the temperature at a rate of 10°C / min, and keep it at 1425°C for 60 minutes, then raise the temperature at a rate of 12°C / min to 1550°C and keep it for 30 minutes, then quench and cool it, keep it at 1475°C for 30 minutes, and keep it at 1450°C Insulated for 15 minutes to obtain β″-Al 2 o 3 ceramic electrolyte.

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Abstract

The invention relates to a preparation method of a Na-beta''-Al2O3 solid electrolyte, comprising the following steps of: adding a stabilizer in a compound containing sodium, aluminium and magnesium or lithium as a raw material; preparing precursor powder; placing the prepared precursor powder into a microwave oven after being subjected to prilling and molding; and fast sintering to obtain the Na-beta''-Al2O3 electrolyte. The method not only has short reaction time and can furthest reduce the loss of Na2O and ensure the conductivity of the material, but also has low energy consumption and hightemperature rate and can obtain a sample with higher compactness; and in addition, the Na-beta''-Al2O3 solid electrolyte prepared by the method shows excellent property and is suitable for being usedas the solid electrolyte of a sodium-sulphur battery and a sodium-nickel chloride battery.

Description

technical field [0001] The present invention relates to a kind of preparation method of solid electrolyte material, especially a kind of Na-β "-Al used in beta battery 2 o 3 solid electrolyte method. Background technique [0002] Due to the depletion of petroleum resources and other fossil energy sources, the development and utilization of green energy such as wind energy and solar energy is booming in China. However, the current energy storage technology of wind energy and solar energy has become a restrictive factor that cannot be applied to large-scale power generation. The large-scale power energy storage technology that scientists are developing is mainly secondary batteries, which must meet a series of requirements for energy storage batteries: high power density, high energy density, low cost, low self-discharge rate, long cycle life and Good safety performance and so on. At present, the most researches on energy storage secondary batteries are sodium-sulfur batter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622H01M2/14H01M50/40
CPCY02E60/12Y02E60/10
Inventor 杨晖魏晓玲王瑾姜晓萍沈晓冬
Owner NANJING UNIV OF TECH
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