反胶束调控制备氧化铜微纳多级结构薄膜及其储锂性能优化

项目名称： 反胶束调控制备氧化铜微纳多级结构薄膜及其储锂性能优化

项目编号： No.21271058

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： 张卫新

作者单位： 合肥工业大学

项目金额： 78万元

中文摘要： 高速发展的便携消费电子、电动汽车和储能装置加速了对高性能锂离子电池电极材料的需求。CuO因具有较高的比容量和可靠的安全性能，作为过渡金属氧化物类锂离子电池负极材料近来引起关注。目前，其主要存在首次不可逆容量损失较大和循环性能较差两类问题。本项目前期研究表明，基于铜箔基底的CuO微纳多级结构薄膜可直接用作锂离子电池电极；与纳米或微纳多级结构粉体相比，不仅简化电极制作过程，而且提高电极材料结构稳定性，减小接触电阻，明显提高了电极电化学性能。为此拟通过设计反胶束液相与铜箔固相反应，制备Cu(OH)2等微纳多级结构薄膜，并将其转化为CuO微纳多级结构薄膜，直接构造锂离子电池电极。研究"制备条件-薄膜多级结构-电化学性能"之间的关系与规律，揭示薄膜的生长机理与储锂机制，实现CuO微纳多级结构薄膜的有效调控与性能优化。为将反胶束调控方法应用于金属基底上制备微纳多级结构薄膜奠定理论基础和实验依据。

中文关键词： 反胶束；氧化铜；微纳多级结构；薄膜；电化学性能

英文摘要： Recently, there has been an increasing demand for higher performance electrode materials of lithium-ion batteries to meet the rapid development of portable electronic devices, electric vehicles and other equipments. CuO has received much attention given its high capacity and reliable safety as a conversion-type transition metal oxide anode in lithium-ion batteries. However, it still faces drawbacks related with a high level of irreversibility and poor cycling life. Our recent study shows that CuO micro-nano hierarchical structured film based on Cu substrate can be used directly as electrodes for lithium-ion batteries. Compared with powder-form materials, CuO hierarchical structured film not only simplifies electrode preparation, but also enhances structure stability, reduces the contact resistance and thus improves electrochemical properties of the electrodes. This project aims to prepare such as Cu(OH)2 and Cu2(OH)2CO3 micro-nano hierarchical structured films on Cu foils through designing reverse micelles system (liquid W/O) to react with Cu substrates (solid). Moreover, CuO micro-nano hierarchical structured films resulted from the as-prepared Cu(OH)2 or Cu2(OH)2CO3 films will be used directly for electrodes of lithium-ion batteries. We will investigate the growth mechanism of the films on Cu substrates with r

英文关键词： Reverse micelle；CuO；micro-nano hierarchical structure；film；electrochemical property