量子点镶嵌V2O5多孔纳米结构可控制备及其Li电池、光催化性能研究

项目名称： 量子点镶嵌V2O5多孔纳米结构可控制备及其Li电池、光催化性能研究

项目编号： No.61274014

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 朱自强

作者单位： 华东师范大学

项目金额： 86万元

中文摘要： 本项目拟通过一步合成、二次催化生长和二次静电沉积等多种方法，实现宽禁带半导体氧化物量子点镶嵌的V2O5多孔纳米结构的可控制备，以解决低电导率、低Li+迁移率这两大限制V2O5锂电池材料进入实际应用的关键问题。V2O5与宽禁带氧化物的复合材料能够实现从紫外到可见的全光谱光催化，以达到用自然光进行光催化的目的。通过材料的可控制备和结构设计、全面的电化学和光催化性能测试，研究材料形貌结构、量子点尺寸、嵌入比例等对锂电池和光催化性能的影响。通过理论计算，研究材料的成核、生长机理、电化学反应的动力学过程和反应机制、材料电子结构、缺陷态的形成以及不同波长的光吸收谱等，研究材料微结构、性能、电子结构间的相互依存关系，寻找能够实现优异锂电池和全光谱光催化性能的最佳材料结构参数和生长条件。

中文关键词： V2O5纳米结构；纳米颗粒修饰；锂电池；光催化；

英文摘要： V2O5 materials usually exhibit relatively low conductivity and low electrochemical kinetics, which remain as major obstacles for their application in Li-ion batteries. In this project, one-step CVD synthesis, two-step catalytic growth and electrostatic deposition are used to realize controllable synthesis of V2O5 porous nanostructures with wide band-gap semiconductor oxides quantum dots embedded in them. Moreover, the full-spectrum photocatalysis from ultraviolet to visible range can be realized through combining the V2O5 porous materials with wide band-gap oxides, which is important for the rise of photocatalystic efficiency using natural light as a light source. Experimentally, through controllable synthesis and structural design, the influence of various factors, such as morphology, structure, quantum dots size, fraction of embedded quantum dots, on the Li-ion batteries performances and photocatalystic properties will be studied in detail. Theoretically, through calculation, the growth mechanism, the electrochemical reaction mechanism, the electrochemical kinetic process as well as the electronic structure of the material, the formation of defect states and the optical absorption spectra under different wavelengths are to be studied. The relationship between the microstructure of the material, the performance

英文关键词： V2O5 nanostructure；nanoparticle modification；lithium battery；photocatalysis；