开发高性能锂离子电池对缓解能源短缺，改善环境，发展国民经济和保障国家安全具有重大意义。能否实现具有高能量密度，大功率性能的正极材料是开发高性能锂离子电池的瓶颈。钒氧化合物体系因其超高的理论比容量是研发高性能锂离子正极材料的理想选择。本课题以钒氧化合物为研究对象，采用理论和实验结合的方式，以理论研究指导实验，系统地研究预嵌锂V2O5纳米线和V2O5onH2O纳米片、以石墨烯为碳源包覆系列钒氧化合物纳米晶和新型三维多孔V2O5纳米薄膜材料的制备，及其结构、形貌、尺寸对电化学特性的影响，揭示微观结构与电化学性能之间的关系，力求达到性能设计与结构设计之间的统一，探索新的可控制备的方法，实现具有高能量密度、高循环稳定性、高倍率性能的锂离子电池用钒氧化合物正极材料。

Development of high-performance lithium-ion battery is of great significance to alleviate the energy shortage, improve our environment, develop the national economy and safeguard national security. Exploring cathode materials with high energy density, high-power performance is the bottleneck of the development of high-performance lithium-ion battery. Vanadium compound materials because of its ultra-high theoretical specific capacity is the ideal choice for developing high-performance lithium-ion cathode materials. This project is aimed at studing the vanadium oxides by the method of combining theory and experiment. Based on theoretical studies guiding the experiments, this project will systematically study the fabrication of lithiated V2O5 nanowires and V2O5onH2O nanobelts, series of vanadium compound nanocrystals coated by granphene as carbon sources, and new three-dimentional hierarchically porous V2O5 nanofilms, and study the effect of the structure, shape, size on their electrochemical properties, reveal the relationship between microstructure and its electrochemical properties, strive to achieve the unity between the performance of the design and structural design, explore new controllable preparation method, and achieve vanadium compound materials as lithium-ion battery cathode materials with high energy density, high cycle stability and high rate capability.