Recently, a team led by Xi Kai and Ding Shujiang from Xi'an Jiaotong University, together with Zhou Guangmin from the Graduate School at Shenzhen, Tsinghua University, systematically analyzed the degradation mechanisms, defect types, and characterization methods of positive electrode materials (lithium cobalt oxide, ternary cathode materials, lithium iron phosphate, lithium manganese oxide), graphite negative electrodes, and current collectors throughout the entire lifecycle of batteries. The research findings were published in Advanced Materials.
The study systematically analyzes the degradation mechanisms, defect types, and characterization methods of cathode materials (lithium cobalt oxide, ternary cathode, lithium iron phosphate, lithium manganese oxide), graphite anode, and current collector throughout the entire lifecycle of batteries. (Image provided by the research team).
Compared to traditional hydrometallurgical and pyrometallurgical techniques, direct recycling technologies for waste batteries exhibit significant environmental and economic advantages. The core principle is to repair the defective structures of waste battery materials, thereby restoring their electrochemical performance. To achieve this goal, it is necessary to delve into the mechanisms of defect formation in waste batteries. The team summarized various regeneration methods applicable to different retired cathode materials, graphite anodes, and current collectors, and identified the main challenges and solutions facing large-scale direct recycling of retired lithium batteries. The aim is to explore more efficient and environmentally friendly lithium-ion battery recycling methods by providing theoretical foundations and practical guidance.
Related paper information: https://doi.org/10.1002/adma.202313273
