A kind of sodium-sulfur battery recovery method
A technology of sodium-sulfur battery and recovery method, applied in the field of comprehensive utilization of resources, can solve the problem of no sodium-sulfur battery recovery method and the like
Active Publication Date: 2018-06-05
上海电气企业发展有限公司
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Problems solved by technology
[0003] At present, there is no feasible recycling method for sodium-sulfur batteries in China.
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[0025] see figure 1 In order to better understand the technical solution of the present invention, the inventors of the present invention will describe in detail below through specific embodiments in conjunction with the accompanying drawings:
[0026] see figure 1 , the current sodium-sulfur battery includes a casing 1, a carbon felt 2, an electrolyte ceramic tube 3, and a sodium storage tube (not shown in the figure), which are arranged radially from outside to inside. The top of the electrolyte ceramic tube 3 is sealed with a ceramic insulating ring 4 A top seal cover 5 is arranged above the ceramic insulating ring 4 to seal the tops of the sodium storage tube and the electrolyte ceramic tube 3 . The top surface of the top sealing cover 5 is provided with a negative electrode tab 52 , and the top of the casing 1 is provided with a positive electrode tab 51 . When the sodium-sulfur battery is fully charged, elemental sodium is stored in the sodium storage tube, and sulfur ...
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The invention discloses a method for recycling a sodium-sulfur battery. The sodium-sulfur battery includes a casing, a carbon felt, an electrolyte ceramic tube, a ceramic insulating ring, a top sealing cover, a positive pole lug and a negative pole lug. The method includes the following steps: a discharge step: Discharge the sodium-sulfur battery completely, so that the elemental sodium in the sodium-sulfur battery can be converted into sodium polysulfide to the maximum extent, and stored in the carbon felt; metal material recovery steps: separate the shell from the carbon felt, separate the positive electrode lug from the shell, and the negative electrode The tab is separated from the top sealing cover; the sulfur recovery step: separate the carbon felt from the electrolyte ceramic tube, and dissolve the sodium polysulfide in the carbon felt into the solvent; the sodium recovery step: separate the top sealing cover from the ceramic insulating ring, and Invert the electrolyte ceramic tube into paraffin oil to melt the elemental sodium in the electrolyte ceramic tube into the paraffin oil; high-temperature ablation step: place the electrolyte ceramic tube in a high-temperature incinerator to make the residual elemental sodium in the electrolyte ceramic tube Converted to sodium oxide or sodium hydroxide or sodium carbonate.
Description
technical field [0001] The invention relates to a sodium-sulfur battery recovery method in the field of comprehensive utilization of resources. Background technique [0002] After a period of service, the performance of sodium-sulfur batteries can no longer meet the requirements of use. The waste sodium-sulfur battery is composed of active materials: elemental sodium, sulfur and sodium polysulfide, metal parts: positive tab, negative tab, casing and sodium storage tube, electrolyte ceramic tube, and ceramic insulating ring for insulation and sealing , and a glass composition for sealing the electrolyte ceramic tube and the ceramic insulating ring. Among them, elemental sodium, sulfur and sodium polysulfide are dangerous chemical substances, and improper handling may cause great harm to life, property and the environment. [0003] At present, there is no feasible recycling method for sodium-sulfur batteries in China. Contents of the invention [0004] The object of the p...
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IPC IPC(8): H01M10/54
CPCY02W30/84
Inventor 鲍剑明龚明光王国林陈学淼周日生刘宇徐中超
Owner 上海电气企业发展有限公司