三维超结构石墨烯基复合材料的可控合成与嵌锂性能研究

项目名称： 三维超结构石墨烯基复合材料的可控合成与嵌锂性能研究

项目编号： No.U1330123

项目类型： 联合基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 李宝华

作者单位： 清华大学

项目金额： 88万元

中文摘要： 本项目以氧化石墨烯为基元，自组装制备三维超结构石墨烯基复合材料，通过构筑多层次结构，获得具有超高性能的锂离子电池负极材料。主要研究内容包括理解氧化石墨烯片层的自组装机制，发展结构可控的三维结构石墨烯材料的组装及功能调制方法，研究以其为模板与非碳组分的复合制备三维超结构石墨烯基复合材料，调整微观结构和复合方法，调控其性能；调控氧化石墨烯的自组装行为，发展三维超结构石墨烯基复合材料的一步自组装及结构调控方法；深入研究锂离子的反应与输运机制，发展超高性能的三维超结构石墨烯基复合负极材料制备及结构调控工艺。本项目的实施将揭示三维石墨烯超结构的组装机理及结构调控机制，获得具有优异电化学性能的三维石墨烯复合材料制备方法，对石墨烯基材料的设计、可控组装和应用具有重要的指导意义。因此，本项目不仅具有重要的理论研究价值，还具有较大的实际应用价值。

中文关键词： 石墨烯；三维结构；复合材料；锂离子电池；

英文摘要： The purposes of this project are to controllably assemble three-dimensional graphene-based composites with hyperstructure using graphene oxide as the basic unit and to obtain anode materials of Li-ion battery with ultrahigh performance by optimal structure designing. The research of this project mainly focuses on the following three aspects. First, on the basis of the assembly phenomena of graphene oxide, controllable assembly and functionalization methods are investigated for the preparation of three-dimensional graphene-based structures and then the composite with hyperstructure will be prepared by using above structure as template. Second, a one-step assembly strategy and the following structure control for the assembly of three-dimensional graphene-based composite with hyperstructure will be developed. Third, the Li-ion reaction and transportation mechanism will be explored to provide guidance for the structure optimization of above composites to obtain anode materials with ultrahigh performance. The researches of this project will promote the theoretical studies of controllable assembly of graphene-based structure and accelerate the real application of graphene-based materials.

英文关键词： graphene；three-dimensional structure；composite material；Li-ion battery；