冰模板法构筑碳-钒基氧化物复合材料的结构调控机制及材料储锂性能研究

项目名称： 冰模板法构筑碳-钒基氧化物复合材料的结构调控机制及材料储锂性能研究

项目编号： No.21501160

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 王斌

作者单位： 中国工程物理研究院化工材料研究所

项目金额： 20万元

中文摘要： 碳-钒基氧化物复合材料能有效改善钒基氧化物的储锂性能，但其绿色高效、可控制备，尤其是对其微观结构的可控构筑和性能的调控仍是一项巨大的挑战。针对存在的问题，本项目拟研发以冰晶为模板导向剂，绿色高效、可控制备兼具离子通道和电子导电网络的碳-钒基氧化物复合材料的方法，并调节不同的构筑条件，对碳-钒基氧化物协同自组装的构筑机制和其储锂性能的调控规律进行研究。本项目有助于理解以冰晶为模板调控一种或多种材料自组装复合的规律和机制；阐明构筑条件和复合物结构之间的关系；揭示复合电极材料的电化学性能与其微观结构的构效关系；获得具有高性能储锂特性的复合材料的绿色高效、可控制备方法和性能调控规律，具有重要的理论和实际意义。

中文关键词： 冰模板；构筑；碳-钒基氧化物；结构调控；储锂性能

英文摘要： To hybrid vanadium oxides with conductive carbon backbone is one of the general and effective approaches to improve the lithium-storage performances of vanadium oxides electrode, which have been limited by poor cycling stability and rate capability. However, the controllable preparation of such hierarchical nanostructures via a facile, efficient and green approach and their performance manipulation are still big challenges. .In this project, we propose a facile, green and controllable approach to make carbon-vanadium oxide nanocomposites with better Li-ion diffusion and electronic conductive path. Ice crystals are used as green templates to direct the self-assembly of carbon and vanadium oxide to construct hierarchical nanocomposites. This project will study the construction mechanisms and principles of hierarchical nanocomposites by using ice crystals as templates, and the manipulations of the as-prepared micro/nanostructures as well as their lithium storage performances. This project will disclose the assembling mechanisms of inorganic materials with ice crystals as templates, and reveal the structure-properties relationships of such composites electrode. By this study, the environment-friendly synthesis method to construct hierarchical nanocomposites with improved electrochemical performances can be obtained, which would settle a foundation for the further development of Li-ion batteries.

英文关键词： ice-template;construction;carbon-vanadium oxide;structure manuipulation;lithium stroage properties