Comprehensive Experimental Teaching Design for Recovery and Reuse of Valuable Metals from Ternary Positive Electrode Materials in Simulated Retired Lithium Batteries
ZHAI Yun-Yun1, LI Lei2, LIU Hai-Qing2**
1. College of Material and Textile Engineering,Jiaxing University,Jiaxing 314001,China; 2. College of Biological,Chemical Sciences and Engineering,Jiaxing University,Jiaxing 314001,China
Abstract Recycling and reuse of spent lithium-ion batteries have significant economic and environmental value.How to efficiently and environmentally recycle valuable metals from lithium batteries has become a topic worthy of in-depth exploration for teachers and students major in chemistry,chemical engineering,and materials science.In order to find a low-cost,environmentally friendly and efficient metal recovery technology,we designed choline chloride-ascorbic acid-H2O deep eutectic solvent(DES)and systematically explored the method of DES extraction of valuable metals from the ternary positive materials of lithium batteries.And the ternary positive electrode material was reprepared by co-precipitation and high-temperature solid-phase synthesis using recycled metal ions.The study showed that as-prepared DES had a high extraction rate of 100% for the valuable metals in the ternary positive electrode material under a mild leaching condition(55 ℃,1 h).As-prepared ternary positive material was uniform,indicating the successful preparation of the ternary positive material.The initial discharge capacity of the synthesized ternary material was as high as 135.6 mAh/g,and the Coulombic efficiency remained stable at 97.7% after 100 cycles.The experiment is rich in content and conducive to students’ integration of knowledge from different disciplines.It stimulates students’ innovative consciousness and research interest,cultivates their research literacy,enhances their ability to analyze and solve problems,and achieves the integration of science and education.
ZHAI Yun-Yun, LI Lei, LIU Hai-Qing. Comprehensive Experimental Teaching Design for Recovery and Reuse of Valuable Metals from Ternary Positive Electrode Materials in Simulated Retired Lithium Batteries[J]. Chinese Journal of Chemical Education, 2025, 46(12): 31-37.
