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Preparation method of high-conductivity beta'-Al2O3 ceramic electrolyte

A ceramic electrolyte, high conductivity technology, applied in electrolytes, circuits, electrical components, etc., can solve the problems of increased grain boundary resistance, uneven diffusion of electrolyte materials, hindering Na conduction, etc., and achieve the effect of high conductivity

Active Publication Date: 2020-09-18
BEIFANG UNIV OF NATITIES +1
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Problems solved by technology

[0004] However, during the sintering process of SPS rapid temperature rise and pressure increase, the electrolyte material diffuses unevenly in a short period of time, resulting in a large number of pores, resulting in increased grain boundary resistance, which greatly hinders the Na + conduction

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  • Preparation method of high-conductivity beta'-Al2O3 ceramic electrolyte
  • Preparation method of high-conductivity beta'-Al2O3 ceramic electrolyte

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Embodiment Construction

[0018] The present invention adopts hydrothermal reaction method to prepare boehmite as a precursor, adopts ice crystal template assisted freeze-drying method, utilizes SPS sintering furnace and high temperature sintering furnace to sinter sequentially to obtain high conductivity β"-Al 2 o 3 ceramic electrolyte.

[0019] Concrete scheme of the present invention is as follows:

[0020] A High Conductivity β"-Al 2 o 3 The preparation method of the ceramic electrolyte includes a powder preparation step and a sample sintering step, and the powder preparation step S10 is specifically:

[0021] Step S100, after calcining the boehmite precursor powder at a predetermined temperature for a predetermined time, to obtain Al 2 o 3 powder. Among them, the predetermined temperature is 1100°C, and the predetermined time is 2 h. The boehmite precursor powder is obtained according to the following steps: 1 mol / L NaOH solution is added dropwise to 0.16 mol / L AlCl 3 In the solution, adju...

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Abstract

A preparation method of a high-conductivity beta'-Al2O3 ceramic electrolyte comprises a powder preparation step and a sample sintering step. Boehmite as a precursor is prepared by adopting a hydrothermal reaction method; an ice crystal template assisted freeze drying method is adopted; at first, pre-sintering is performed by utilizing an SPS sintering furnace to obtain an SPS sintered sample witha certain oriented structure; and then a high-temperature sintering furnace is used for powder burying sintering to form a uniform beta''-Al2O3 ceramic electrolyte, and the conductivity of the beta''-Al2O3 ceramic electrolyte at 350 DEG C reaches 0.234 S.cm<-1>.

Description

technical field [0001] The invention relates to the technical field of manufacturing ceramic electrolyte materials, in particular to a high conductivity β"-Al 2 o 3 Preparation method of ceramic electrolyte. Background technique [0002] β"-Al 2 o 3 Ceramic electrolytes are known for their excellent Na + Conductive properties are widely used in sodium-sulfur batteries. With the development of new energy technology, higher requirements are put forward for large-scale energy storage technology. Sodium-sulfur batteries due to high energy density (~760 Wh kg -1 ) and cycle life have attracted much attention. In the whole battery system, β″-Al 2 o 3 The ceramic tube is not only the electrolyte, but also acts as a diaphragm. It is the most important core component and plays a vital role in improving the performance of the battery. β″-Al currently in industrial use 2 o 3 The conductivity of the ceramic tube is <0.2 S·cm -1 . It is crucial to further improve the con...

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Application Information

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IPC IPC(8): C04B35/10C04B35/622C04B35/64H01M10/39
CPCC04B35/10C04B35/622C04B35/64H01M10/3918H01M2300/0074C04B2235/3206C04B2235/442C04B2235/606C04B2235/666C04B2235/96Y02E60/10
Inventor 张笑李开云梁森杨洋
Owner BEIFANG UNIV OF NATITIES
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