基于金属锂负极和固体电解质的二次电池由于低成本、高安全和环境友好等优势被认为是极具希望的下一代储能体系。这种新型体系从界面电化学反应机理、体相物质输运特征、材料的设计优化等方面都需要做深入的研究。本项目选择氧和硫单质作为锂基负极固态电池的正极活性物质，以锂/电解质、氧气/固态正极和硫/固态电解质这三种典型的界面为研究对象。深入研究固态锂空气电池中氧气/催化剂界面电荷传递和体相锂离子迁移机制，以及固态锂硫电池电解质表面硫化锂生成和分解机理。重点关注固固界面离子迁移问题和改善方案，引入凝胶和聚合物以降低界面阻抗。本项目通过对固体电解质、合金负极、正极催化材料、及电池体系的优化设计和匹配，大幅提高固态锂二次电池的功率、寿命和储能效率，为固态锂二次电池的实用化打下坚实的理论研究基础。

Secondary batteries based on lithium metal anodes and solid electrolytes are considered as a very promising system of next generation energy storage due to their low cost, high safety and environment friendliness. This new system needs to be intensively studied from the aspects of the electrochemical reaction mechanism of the interface, the transport characteristics of bulk materials and the design optimization of materials. In this project, oxygen and sulfur are selected as the active materials of the solid-state batteries with lithium-based anodes. Besides, three typical interfaces of lithium/solid electrolyte, oxygen/solid cathode and sulfur/solid electrolyte are studied as research subjects. On this basis, further and intensive research will be conducted on the mechanism of charge transfer at the oxygen/catalyst interface and lithium ion transport of the solid-state lithium air batteries and the formation and decomposition mechanism of lithium sulfur on the surface of the electrolyte of the solid-state lithium sulfur batteries. Moreover, the project focuses on the ion migration problem and improvement of the solid-solid interface and the gel and polymer are introduced to reduce the interfacial resistance. Through the investigation of solid electrolyte, alloy anode, cathode catalytic materials and battery system design and optimization, this project will greatly raise the power, life and energy storage efficiency, laying a solid research foundation for the practical application of solid state lithium secondary battery.