基于配位聚合物超长纳米线的柔性电极材料的制备和性能研究

柔性储能器件的开发和应用大大促进了电子产品的多功能化，发展高性能电极材料是柔性储能器件发展的关键所在。通过真空抽滤氧化石墨烯与赝电容活性物质的分散液制备柔性薄膜电极是一种被广泛采用的柔性电极制备方法。而该方法所制备的石墨烯自支撑柔性复合薄膜电极普遍存在由于活性物质与氧化石墨烯亲和性差引起的薄膜分层、材料整体柔性、力学性能差的问题，从而进一步导致活性储能物质的储能能力无法充分发挥。从提高柔性薄膜电极储能性能、电化学稳定性和柔性的角度出发，本项目拟研究制备一种与氧化石墨烯分散液有良好相容性和分散性的柔性配位聚合物超长纳米线，采用真空抽滤法将配位聚合物纳米线与氧化石墨烯复合制备高质量柔性电极薄膜，并最终通过煅烧处理还原氧化石墨烯，同时将配位聚合物纳米线转换为金属氧化物纳米线，从而得到微结构均匀良好的电极材料，在保证电极材料具有优异柔性的基础上，实现薄膜电极的高导电和高比容量。

The emerging and application of flexible energy storage devices have tremendously boosted the development of multifunctional electronics. However, challenges still exist in the pursuit of high-performance electrode materials. Vacuum filtration is a widely used method to prepare flexible film electrode which contains nano-carbon materials and electrochemical active materials. However, the self-supported flexible graphene composite film prepared by this method usually shows poor structure stability, limited flexibility and mechanical performance, which further leads to the uncomprehensive utilization of the energy storage ability derived from the electrochemical active materials. Therefore, the present project is motivated by the need to develop a simple and effective approach to fabricate flexible electrode with enhanced flexibility and energy storage performance. Firstly, coordination polymer nanowires with high dispersity and affinity with graphene oxide solutions would be prepared, followed by vacuum filtrating with graphene oxide to form composite film. Then, high temperature treatment would be applied to the composite film in order to transform coordination polymer nanowires into metal oxide nanowires and graphene oxide into reduced graphene oxide. It is anticipated that the resulted flexible composite film would show homogeneous microstructure, excellent flexibility and capacitance performance.