一种协同回收废磷酸铁锂电池与废三元锂离子电池正极粉的方法
By using a synergistic leaching method with nitric acid and acetate as leaching agents, the problems of high energy consumption and high reagent costs in lithium-ion battery recycling have been solved, achieving efficient and low-cost recovery of valuable metals, simplifying the process and reducing pollutant emissions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- XIANGTAN UNIV
- Filing Date
- 2023-01-17
- Publication Date
- 2026-07-17
AI Technical Summary
Among existing lithium-ion battery recycling methods, pyrometallurgical recycling is energy-intensive and emits polluting gases, while wet recycling consumes oxidants or reducing agents, resulting in high costs, increased production costs, and environmental pollution.
Nitric acid and acetate were used as leaching agents. Through synergistic action, the divalent iron in lithium iron phosphate was oxidized and the high-valent metal in lithium nickel cobalt manganese oxide was reduced to generate nitric oxide to improve utilization. Subsequently, a mixed salt solution of lithium, cobalt, nickel and manganese and solid iron phosphate were obtained by pH adjustment and co-precipitation. Finally, a carbonizing agent was added to obtain lithium carbonate.
It enables low-cost and high-efficiency recovery of valuable metals such as lithium, cobalt, nickel, and manganese, simplifies the process, reduces production costs, improves leaching efficiency, and reduces pollutant emissions.
Smart Images
Figure CN115954574B_ABST