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A kind of sodium battery interface homogeneous sealing method

A sodium battery and interface technology, which is applied in the field of sodium battery interface homogeneous sealing, can solve the problems of reducing the sealability of materials, differences in properties, and differences in wettability of sealing glass

Active Publication Date: 2015-10-21
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As mentioned above, in the glass sealing of Na / S and ZEBRA cells, due to the material on both sides of the glass (α-Al 2 o 3 and Na-beta-Al 2 o 3 ) have different structures, different properties, different thermal expansion coefficients, and different wettability to the sealing glass, which greatly reduces the sealability of the material

Method used

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  • A kind of sodium battery interface homogeneous sealing method
  • A kind of sodium battery interface homogeneous sealing method
  • A kind of sodium battery interface homogeneous sealing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh a certain mass of Na-zeta (NaAl 5 o 8 ) powder and Li-zeta (LiAl 5 o 8 ) powder with alcohol as the medium, after ball milling for 1-5 hours, drying and sieving to obtain a mixed powder with a particle size of 200 mesh. The substrate material with a density of 99% α-Al 2 o 3 slices, embedded in the above powder, heat treatment at 1200°C for 2-5h. Clean the heat-treated sample with alcohol, polish the cross-section with the alcohol suspension solution of corundum powder as the medium, corrode it with hot phosphoric acid for 5 minutes, observe the cross-sectional morphology, and find that there are obvious Na-beta-Al on the surface 2 o 3 film formation. Its microscopic appearance is shown in figure 2 , the thickness of the film is about 10-20 microns. Simultaneously grow the surface with Na-beta-Al 2 o 3 thin film α-Al 2 o 3 and Na-beta-Al 2 o 3 Test its high-temperature wettability to DM308 glass in the temperature range of 800-1150°C. The experime...

Embodiment 2

[0035] Prepare Na-zeta (NaAl 5 o 8 ) and Li-zeta (LiAl 5 o 8 ) mixed powder. The substrate material with a density of 99% α-Al 2 o 3 slices, embedded in the above powder, heat treatment at 1300°C for 2-5h. Clean the heat-treated sample with alcohol, polish the cross-section with the alcohol suspension solution of corundum powder as the medium, corrode it with hot phosphoric acid for 5 minutes, observe the cross-sectional morphology, and find that there are obvious Na-beta-Al on the surface 2 o 3 film formation. Its microscopic appearance is shown in figure 2 , the thickness of the film is about 30-40 microns. Simultaneously grow the surface with Na-beta-Al 2 o 3 thin film α-Al 2 o 3 and Na-beta-Al 2 o 3 Test its high-temperature wettability to DM308 glass in the temperature range of 800-1150°C. The experimental results obtained are shown in the table below. Compared with Comparative Example 1, the surface has obvious film generation, and compared with Example...

Embodiment 3

[0037] Prepare Na-zeta (NaAl 5 o 8 ) and Li-zeta (LiAl 5 o 8 ) mixed powder. The substrate material with a density of 99% α-Al 2 o 3 slices, embedded in the above powder, heat treatment at 1400°C for 2-5h. Clean the heat-treated sample with alcohol, polish the cross-section with the alcohol suspension solution of corundum powder as the medium, corrode it with hot phosphoric acid for 5 minutes, observe the cross-sectional morphology, and find that there are obvious Na-beta-Al on the surface 2 o 3 film formation. Its microscopic appearance is shown in image 3 , the thickness of the film is about 40-50 microns. Simultaneously grow the surface with Na-beta-Al 2 o 3 thin film α-Al 2 o 3 and Na-beta-Al 2 o 3 Test its high-temperature wettability to DM308 glass in the temperature range of 800-1150°C. The experimental results obtained are shown in the table below. The XRD pattern of its film is shown in Figure 4 , indicating that the homogeneity of the sealed mater...

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Abstract

The invention provides a sodium battery interface in-phase sealing method. According to the method, two sealed materials alpha-Al2O3 and Na-beta-Al2O3 are sealed through a sealing material, wherein before the sealing material is sealed, the surface of one sealed material alpha-Al2O3 is modified so as to grow a Na-beta-Al2O3 film which has the same phase with the other sealed material Na-beta-Al2O3 ceramics. The Na-beta-Al2O3 film which has the same phase with the Na-beta-Al2O3 ceramics can be generated on the surface of a substrate alpha-Al2O3, the film has the advantages of high density, high chemical stability, high thermal shock resistance, good bonding performance with the substrate alpha-Al2O3 and the like. The method has high controllability on the growth thickness of the film, the wetting symmetry on two sides of the sealed materials is improved, and the aim of improving the sealing performance is achieved.

Description

technical field [0001] The invention relates to the field of energy materials, in particular to a sodium battery interface homogeneous sealing method for improving the wetting symmetry of two sealed materials. Background technique [0002] The Na / S battery uses metallic sodium and sulfur as electrodes, using Na-beta-Al 2 o 3 The electrolyte can be used as a high-performance battery for energy storage. Its advantages lie in high specific energy and specific power, stable working temperature, abundant sources of raw materials, low price, and easy mass production. As early as 1965, the Ford Company of the United States invented this battery, and then the United Kingdom, France, Germany, Japan and China successively studied it. At present, Na / S batteries have been applied in power grid load balancing, emergency power supply and uninterruptible power supply. The Shanghai Institute of Ceramics, Chinese Academy of Sciences has carried out a lot of research work on sodium-sulfur ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C8/24C04B37/00
Inventor 温兆银张高校吴相伟张敬超
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI