Cathode of sodium-sulfur cell

Abstract

The invention discloses a cathode of a sodium-sulfur cell in the field of chemical energy storage. The cathode of the sodium-sulfur cell comprises an electrolyte ceramic tube, wherein a cathode room is formed at the radial inner side of the electrolyte ceramic tube; a ceramic insulated ring which protrudes outwards in a radial manner is arranged at the top surface of the electrolyte ceramic tube; a sodium storage tube and a safety tube sleeved at the outer side of the sodium storage tube are arranged inside the cathode room; the top of the sodium storage tube is sealed through a cathode sealing cover; a cathode sealing ring is arranged between the ceramic insulated ring and the cathode sealing cover to seal the cathode room; a buffer layer which is insulated and does not infiltrate into liquid sodium is arranged between the bottom of the outer wall of the safety tube and the bottom of the inner wall of the electrolyte ceramic tube; a bottom protecting layer which is insulated and does not infiltrate into sulfur and sodium polysulfide is arranged at the bottom of the outer wall of the electrolyte ceramic tube. The cathode of the sodium-sulfur cell has the technical effects that the demands on the verticality and the bottom roundness of the electrolyte ceramic tube are reduced when the bottom of the electrolyte ceramic tube is prevented from participating into reaction.

Description

technical field [0001] The invention relates to a sodium-sulfur battery negative electrode in the field of chemical energy storage. Background technique [0002] Such as figure 1 As shown, the negative electrode of the sodium-sulfur battery includes an electrolyte ceramic tube 4 , and a negative electrode chamber 400 is formed in the electrolyte ceramic tube 4 . The negative electrode chamber 400 is provided with a safety tube 8 and a sodium storage tube 9 , and the safety tube 8 is sleeved on the outside of the sodium storage tube 9 . The bottom of the sodium storage tube 9 is provided with a through hole 91 , and the top of the sodium storage tube 9 and the negative electrode chamber 400 are closed by the negative electrode sealing cover 11 . A ceramic insulating ring 3 protruding radially outward is provided on the top surface of the electrolyte ceramic tube 4 . [0003] The core component of the sodium-sulfur battery is the electrolyte ceramic tube 4, which is made of...

AI Technical Summary

Problems solved by technology

The negative electrode of the sodium-sulfur battery designed in this way has high requirements for the verticality of the electrolyte ceramic tube 4 and the roundness of the bottom of the electrolyte ceramic tube 4, so processing the electrolyte ceramic tube 4 is time-consuming and laborious, and at the same time, the electrolyte ceramic tube 4 is easily damaged during use.

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