钼基复合氧化物/石墨烯的纳米结构可控构筑及储锂性能研究

项目名称： 钼基复合氧化物/石墨烯的纳米结构可控构筑及储锂性能研究

项目编号： No.21271078

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 胡先罗

作者单位： 华中科技大学

项目金额： 77万元

中文摘要： 功能纳米组装体的性质可以通过改变"建筑单元"的组分、结构、形貌、表面/界面和排列方式进行精确调控，这在储能器件设计与应用方面具有诱人的应用前景。本项目旨在研发一系列高性能下一代锂离子动力与储能电池新型负极材料，可控构筑结构稳定且具有高能量密度、高倍率充放电性能和长期循环性能的钼基复合氧化物/石墨烯纳米复合材料。探索纳米结构与纳米组装体的可控生长与形成机制，系统研究纳米复合物的组分、结构、形态对其比容量、倍率性能、循环寿命的影响，在实验和理论结合的基础上认识纳米组装体"建筑单元"的协同效应，揭示微/纳米结构与储锂性能的构效关系与演变规律，探索新型电极材料在电化学反应过程中电子传导、锂离子扩散的相关机理，实现高性能锂离子电池负极材料的可控制备与应用。为开发高性能下一代锂离子二次电池提供有益的指导与帮助，为先进能量转换与储存技术的发展奠定科学基础，促进化学、材料、能源等学科的交叉融合。

中文关键词： 纳米结构；设计合成；锂离子电池负极材料；钼基复合氧化物；石墨烯

英文摘要： The properties of functional nanostructured assemblies can be finely tuned by controlling the component, structure, morphology, surface/interface, and arrangement of their building blocks. They hold a great potential for the design and application of energy-storage devices. This project is mainly focused on the development of novel nanostructured anode materials for the next-generation power and energy-storage Li-ion batteries (LIBs). The hybrid nanostructures comprising Mo-based composite oxides and graphene will be controllably fabricated, and will be used as anode materials with high capacity, high rate capability, and long cycle life. The controlled growth and formation mechanism of the nanostructures and nanoarchitectured assemblies will be explored. The dependence of the capacity,rate capability,and cycle life on the component, structure, morphology of the hybrids will be investigated systematically. The synergistic effect of the building blocks will be explored on the base of both the experimental and the theoretical results. The relationship between the microstructure/nanostructure and the lithium-storage performance together with the evolution rule will be clarified. Furthermore, we will explore the processes of the electron conduction and Li-ion diffusion during the discharge/charge reactions, facilita

英文关键词： Nanostructures；Desinged synthesis；Anode materials；Mo-containing nanocomposites；Graphene