锂电池隔膜超临界水催化气化特性研究

With the rapid promotion and application of new energy batteries, the recycling treatment of waste batteries has gradually become an important issue that needs to be solved. However, the current recycling technologies, especially those related to the recycling treatment of lithium battery separators, are still immature. Supercritical water gasification (SCWG) technology, as a new type of clean and efficient waste conversion technology, provides a new idea for the recycling treatment of battery separators. However, there are few studies on the supercritical water catalytic gasification characteristics of battery separators, which hinders the further development of battery separator recycling technology. This study was carried out to address the above shortcomings. The effects of different catalysts, pressure, temperature, catalyst addition and residence time on the supercritical water catalytic gasification of battery separators were investigated. The catalytic gasification mechanism of battery separators in supercritical water (SCW) was also summarized. It was found that K₂CO₃ had the best catalytic effect. When the reaction temperature was 680^◦C, the carbon gasification efficiency (CE) could reach up to 98.30%, which was close to complete gasification. And the H₂ yield was 49.78 mol/kg at this time. The technology of SCWG realizes the clean recycling of battery separators and enhances the economic value.