针对目前废旧锂离子电池再生利用过程中氟组分迁移转变规律不清、溶液深度除氟难度过大、残余微量氟组分对再生正极材料产品影响作用不明等问题，本研究以废旧三元动力锂离子电池再生循环为例，系统解析废旧锂离子电池热解-浸出/除杂-材料再生过程中氟的迁移规律，重点探讨含氟化合物热解产物与正极材料的作用机制及其分配规律，氟离子的溶液化学行为，氟与过渡金属组分的共沉积机理和氟掺杂量对再生材料结构、形貌和电化学性能的影响。通过上述研究，理清废旧锂离子电池再生利用过程中氟元素的走向规律，并在此基础上，突破传统冶炼“浸出-净化-材料制备”的技术思路束缚，从材料设计角度逆向思维，将溶液中的杂质氟组分调控转化成对再生材料有益的掺杂元素，降低溶液除氟难度，从而形成以再生正极材料设计为导向的氟元素定向迁移和精准调控机制，为废旧锂离子电池高效再生利用和清洁生产奠定理论基础和技术支撑。

This project is aimed at addressing the problems in the recycling of spent lithium ion battery (LIB) including the unknown migration and transformation of fluorine, the great difficulty in deep fluoride removal, as well as the unknown effect of trace fluorine on regenerated cathode material. Taking the recycling of spent ternary power LIB as an example, this project, on an overall and systematic basis, will analyze the migration and transformation of fluorine in the process of pyrolysis, leaching, impurity removal and regeneration of spent LIB, and the focus will be put on the migration rule of fluorine compounds pyrolysis products and their reaction with cathode material, the solution chemistry behaviors of fluorine ion and the co-deposition mechanism of fluorine and transition metals, as well as the effect of fluorine contents on the structure, morphology and electrochemical performance of regenerated material. The above-mentioned study will help clarify the fluorine migration in the process of spent LIB recycling. On this basis, this research also breaks through the technical shackles of traditional smelting of leaching-purification-material preparation. By reverse thinking from the perspective of material design, this research will form a directional migration and precise regulation mechanism of fluorine based on regenerated material design, in order to reduce the difficulty of removing fluorine in solution and make the harmful fluorine become helpful for the regenerated cathode material, thus laying theoretical foundation and technical support for the efficient recycling and clean production spent LIB.