碱金属离子电池嵌入型电极材料的无序化设计与储能机理研究

针对目前碱金属离子电池电极材料种类不足，性能有待提高的问题，本项目拟以嵌入式电极材料为代表性材料，围绕大尺寸离子的容纳与扩散这一关键科学问题，通过电极材料原子层面无序化程度设计的方法，结合长程无序与局部短程无序相结合的协同调节，实现嵌入式电极材料存储能力的优化；并建立无序化程度的评估方式，对电极动力学和储能机理进行探索，建立离子尺寸-原子排列无序度-碱金属离子电池性能之间构效关系，为电极材料设计与性能优化提供理论指导与实践基础，为大尺寸离子电池的研究输送更丰富的材料体系，并推动碱金属离子电池向大规模储能器件方向发展。

To face the growing requirements of sodium ion battery, it is necessary to look for more active electrodes and improve their electrochemical performance. Taking intercalation electrode materials as examples, this project aims at tackle the challenges of the accommodation and diffusivity of large-size alkali-ion by amorphization engineering. Here, we introduce synergistic adjustment of long-range disorderliness and local short-range disorderliness as a powerful and universal strategy. The goal is to enhance the electrochemical properties of alkali-ion batteries, and establish an explicit relationship among size of active ion, atomic packing and battery performance. The accomplishment of this project shall lead to significant progress in fundamental research and device applications of alkali-ion battery and further large-scale energy storage.