NH4V3O8比LiV3O8具有更稳定的层状结构、更优的循环稳定性和容量，是一类理想的新型锂离子电池正极材料。但由于其层间NH4+的位阻滞后效应和材料的低导电性致其倍率性能较差，是亟待解决的难题。针对该问题，本项目提出了采用NH4V3O8纳米片尺寸控制拓扑原位转变技术及与碳材料键合复合的思路来实现结构优化，提高倍率性能。拟先采用感应加热水热法实现特定暴露晶面V2O5纳米片的可控合成，并完成与碳材料的键合复合；再通过拓扑转变技术实现纳米片-V2O5@C向纳米片-NH4V3O8@C的拓扑原位转变；通过优化工艺、结构和电化学性能，探索纳米片尺寸、形貌与暴露晶面控制、复合结构界面调控等机制，构建NH4V3O8@C复合结构-嵌锂与脱嵌机制-电化学性能的关系模型，阐明其电极动力学过程，揭示NH4V3O8@C复合结构协同电化学反应机制，为进一步提升NH4V3O8倍率性能和拓宽其应用领域奠定理论基础。

NH4V3O8 as cathode material for lithium ion battery presents more stable layered structure, better cycling stability and higher discharge capacity than LiV3O8. While the steric hindrance block effect from NH4+ and the low conductivity will result in poor rate performance of the NH4V3O8. Therefore, improving the rate performance of the NH4V3O8 is a problem that should be solved urgently. This project proposes a in-situ topology transformation technology to control the size and morphology of nano-layered NH4V3O8 and constructing NH4V3O8@C composite to optimize the structure and improve the rate performance. At first, we prepare the controllable V2O5 nanosheet on the surface of carbon by a induction heating hydrothermal technology. Then we try to make a topology transformation of the V2O5@C to NH4V3O8@C. The controllable size, morphology and exposed crystal plane of the nanosheet will be researched; and the regulation and controlling mechanism the NH4V3O8@C composite interface structure also will be investigated. The purpose is that constructing the relationship model of NH4V3O8@C, lithiation mechanism and electrochemical performance by optimizing the preparation process, structure and property. The electrode kinetics of the NH4V3O8 and the co-electrochemical mechanism of the NH4V3O8@C will be illuminated to provide the foundation for improving the rate performance and broaden the application field of NH4V3O8 materials.