类石墨烯二维多孔钴酸盐薄片的设计合成、调控与赝电容性能增强及储荷机制研究

With the increase of energy consumption and environmental pollution, controlled synthesis of novel materils for electrochemical energy storage is important to develop new energy and improve energy utilization efficiency. Recent years have witness the rapid development of two-dimensional (2D) materials especially graphene-like materials due to their intriguing structures and interesting properties. In the light of how to prepare novel 2D electrode materials for supercapacitors and based on our previous research achievements, we demonstrated here the controlled synthesis of three types of graphene-like 2D porous thin sheets including two-metal and three-metal graphene-like 2D porous cobaltite thin sheets. The effect of the composition and structures of these thin sheets and reaction conditions such as heating temperature, reaction time and heating rate on the microstructures and electrochemical energy storage performance has been analysized in detail. This project will not only provide novel ideas and methods for the synthesis of novel and efficient electrode materials for electrochemical energy storage, but also promote the subject cross development of chemistry, materials, and energy. This project will not only provide novel methods for the synthesis of novel and efficient electrode materials for electrochemical energy storage, but also promote the development of chemistry, chemical engineering, materials, and energy.

研制和开发新的电化学储能材料对于开拓新能源和提高能源的利用效率具有重要的科学意义和实用价值。本项目在前期工作的基础上，拟从合成新型的二维高比能量的超级电容器电极材料入手，以包括钴盐在内的二种、三种或者多种金属盐作为原料，在一元羧酸的酸性条件下，采用控制水（溶剂）热法在较低的温度下实现一系列双金属和三金属类石墨烯二维多孔钴酸盐薄片的可控合成。通过调节反应条件（溶液浓度、加热温度、反应时间、溶剂、pH值等），在宽范围内实现了材料的组成、尺寸、结构、形貌、晶型和结晶度等的同步调控，揭示结构与超电容性能的构效关系。并在所得实验结果的基础上探索二维多孔薄片的形成机理和赝电容性能增强机制。该研究课题不仅是对二维多孔类石墨烯材料新功能的探索，也是构建高性能超级电容器电极材料的一条崭新的途径；不仅在能源方面有重要的应用价值，还可以促进化学、化工、材料、能源等学科的交叉和融合。

研制和开发新的电化学储能材料对于开拓新能源和提高能源的利用效率具有重要的科学意义和实用价值。本项目在前期工作的基础上，拟从合成新型的二维高比能量的超级电容器电极材料入手，以包括钴盐在内的二种、三种或者多种金属盐作为原料，在酸性条件下，采用控制反应条件（溶液浓度、加热温度、反应时间、溶剂、pH值等），在宽范围内实现了材料的组成、尺寸、结构、形貌、晶型和结晶度等的同步调控，揭示结构与超电容性能的构效关系。在所得实验结果的基础上探索二维多孔薄片的形成机理和电化学性能增强机制。本项目不仅是探索了二维多孔类石墨烯材料新功能，也是构建高性能超级电容器电极材料的一条崭新的途径，从而推进二维储能材料的发展和应用。