Forming method for solid electrolyte ceramic tube of sodium-sulfur cell

Abstract

The invention discloses a forming method for a solid electrolyte ceramic tube of a sodium-sulfur cell. The forming method for the solid electrolyte ceramic tube of the sodium-sulfur cell comprises the following steps of material adding, specifically, Na-beta''-Al2O3 powder is added into a mold cavity of a forming mold corresponding to the solid electrolyte ceramic tube of the sodium-sulfur cell in shape, and the top of the mold cavity is sealed; pressing, specifically, the radial outer side of the forming mold is sleeved with a main bag of a main pressure vessel, the forming mold is locked through a bottom sealing cover located at the bottom of the main bag, the main pressure vessel is made to communicate with a pressure pump, pressurization media are injected to the radial outer side of the main bag through the pressure pump, and the Na-beta''-Al2O3 powder in the mold cavity is pressed into a green body of the solid electrolyte ceramic tube of the sodium-sulfur cell; and demolding, specifically, the green body of the solid electrolyte ceramic tube of the sodium-sulfur cell is taken out of the forming mold.

Description

technical field [0001] The invention relates to a method for forming a sodium-sulfur battery solid electrolyte ceramic tube. Background technique [0002] A sodium-sulfur battery is a secondary battery that uses a solid electrolyte ceramic tube as the electrolyte and diaphragm, metallic sodium as the negative electrode material, and non-metallic sulfur as the positive electrode material. It has the advantages of large capacity, small size, long life, high efficiency, etc. It can be used in power grid peak shaving and valley filling, emergency power supply, new energy access, power quality optimization and other fields. [0003] Isostatic pressing is Na-β″-Al 2 o 3 The key steps in the preparation of solid electrolyte ceramic tubes from powder. In the traditional process, the solid electrolyte ceramic tube is formed by wet isostatic pressing. The main process is that the powder is added to the forming mold, that is, the rubber sleeve mold, sealed and degassed, and then put...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a method for forming a sodium-sulfur battery solid electrolyte ceramic tube, which can avoid the shortcomings of traditional wet isostatic pressing, which is difficult to realize automatic operation and low production efficiency, and realizes the sodium-sulfur battery. Automatic continuous production of solid electrolyte ceramic tube green bodies for sulfur batteries, effectively improving production efficiency

Images