虽然锂离子电池已取得巨大的商业成功，但受锂资源短缺、价格高、锂枝晶安全隐患等制约。Na、K与Li同族，性质相似，原料便宜易得，发展基于Na、K元素的可充电池体系对于电网储能等规模应用具有重要战略意义。相对于Li，Na和K离子尺寸大，固相扩散阻力大，如何实现它们的大容量储存和快速传输是挑战。本项目将可控制备富含Fe、Mn、Ni、Cu等廉价过渡金属、具有双钙钛矿、烧绿石和聚阴离子型无机正极材料（Na(K)xA2B2O6，Na(K)xA2B2O7，Na(K)xM[P(S)O4]y）和新型共轭羰基有机电极材料，调控其化学组成和精细结构，认识电荷储存与传输规律，揭示电极结构演变与性能衰退机制，实现Na+/K+的扩散系数达到10-10 cm2/s、无机正极比容量≥200 mAh/g，有机正极比容量≥500 mAh/g，负极比容量200～400 mAh/g，提升钠/钾离子电池的能量/功率密度和循环寿命。

Although Li-ion batteries have gained great success in the global market, they are plagued by the limited lithium resources, high cost, and Li dendrite related safety issues. In the same group with Li, Na and K share similar chemical properties and their resources are cheaper. Batteries based on Na and K ions are crucially important for the development of smart electricity grids. In comparison with Li+, Na+ and K+ ions have larger radius and higher transport resistance. How to realize energy storage with large capacity and fast transport of ions in electrodes is the great challenge. This project will focus on the design and controllable syntheses of inorganic cathodes rich with Fe, Mn, Ni or Cu in a structure of double perovskite (Na(K)xA2B2O6), pyrochlore (Na(K)xA2B2O7), or polyanions,(Na(K)xM[P(S)O4]y),and new organic-inorganic hybrid materials with abundant conjugated carbonyls; tuning the chemical composition and fine structure; exploring the relationship of charge storage with transport; elucidating the structure evolution of electrode and mechanism of battery performance decay; realizing the diffusion of Na+/K+ to reach 10-10 cm2/s and the storage capacity of ≥200 mAh/g for inorganic cathodes, ≥500 mAh/g for organic cathodes, and 200~400 mAh/g for anodes; and eventually, improving the energy/power densities and the lifespan of the sodium- and potassium-ion batteries.