大力发展核能对于解决当前面临的能源和环境问题具有重要的意义。核燃料后处理是实现核能可持续发展的必由之路。离子液体既可以替代传统水法流程中的挥发性易燃溶剂用于萃取分离，也可以替代干法流程中使用的腐蚀性的高温熔融盐作为电化学介质。研究离子液体中金属离子的配位和氧化还原行为，对于促进离子液体在乏燃料后处理中的应用研究具有重要意义。基于我们在相关领域的研究积累，本项目主要对离子液体中铀配合物的制备、结构和性能进行研究，内容包括：(1) 铀与重要的无机和有机配体在离子液体中的配合物的制备和结构表征；(2) 离子液体中铀和萃取剂的相互作用，及对萃取效率的影响规律；(3) 铀配合物的电化学，及通过电解方法从离子液体中沉积UO2的探索研究；(4) 离子液体中稳定的铀(V)配合物的制备，及其在电化学分离回收铀中的应用。本研究工作将为离子液体在核燃料后处理中的应用奠定理论基础和实验依据。

Nuclear energy is important to resolve the problems with energy shortage and environment pollution. Spent fuel reprocessing technology is expected to play an important role in the sustainable development of nuclear power. Ionic Liquids (ILs) are regarded as kinds of green solvents, their potentiality in nuclear fuel chemistry has also been explored in recent years. ILs can serve as alternatives either for volatile and flammable solvents used in the extraction process or for corrosive high temperature inorganic molten salts in the pyrochemical process. Knowledge on the complexation and reduction-oxidation of metal in ILs is of great importance to understand the separation and purification processes involving ILs. Based on our preliminary studies, we propose the research on the preparation, structure and electrochemistry of uranium complexes in ILs. The study of this project includes the following parts: (1) preparation and structure characterization of uranium complexes formed with important organic and inorganic ligands in ILs; (2) interactions between uranium and the extraction agents in ILs, and their influence on extraction efficiency; (3) electrochemistry of uranium complexes in ILs, and the feasibility of deposit UO2 from ILs by electrolysis; (4) preparation of stable uranium(V) complexes, and their application in uranium recovery from ILs. This research project will lay the theoretical foundation and the experimental basis for the application of ion liquid in the nuclear fuel reprocessing.