氧化物纳米线/量子点异质阵列的设计生长与电致变色/储能特性研究

在低电压控制下电致变色材料能选择性反射或吸收不同波段的太阳光，既能充分利用太阳能也可用于能量存储，对智能窗、静态显示和军事隐身等低能耗环保材料的发展具有重要意义。但由于离子存储与载流子输运之间的竞争机制，因而难以同时提升材料的电致变色与储能特性。本课题拟采用模板脉冲电沉积法设计生长一种氧化物纳米线/量子点异质结构阵列，旨在有机结合氧化钨纳米线和氧化钼（氧化钛、氧化铌）量子点分别在电致变色和能量存储上的结构与性能优势，构筑兼具高品质调温/调光和储能特性的材料体系。系统研究纳米线/量子点阵列的晶体学特征、能带结构与反应动力学等因素对电致变色/储能特性的影响规律。寻求纳米线的取向生长、量子点尺寸与分布、纳米线/量子点的界面匹配和表面增强的控制策略。揭示电解质离子在阵列内部、表面与界面的存储与传输机制，并构建理论模型进行动力学分析。从而为高品质电致变色/储能双功能材料的结构设计提供理论与实验依据。

Under low voltage bias, electrochromic materials allow selective refection/absorption of solar light in different wavelength regions, hence, they are of great significance to the development of energy-saving and environmentally friendly materials such as smart windows，static displays as well as military camouflage. Due to the competitive mechanism between ion storage and carrier transportation, it remains a challenge to simultaneously improve both electrochromic and energy storage performance. In this project, a template assisted pulsed electrodeposition method is employed to obtain designed growth of oxide nanowire/quantum dot heterostructure arrays, and we intend to combine the structure and property advantages of tungsten oxide nanowires on electrochromism and molybdenum oxide (titanium oxide, niobium oxide) quantum dots on energy storage, respectively, which promises the construction of high quality materials system with both modulated environment brightness/ temperature act as superior energy storage performance. The research will systematically cover the influence of crystallographic characteristics, band structure and reaction kinetics of the oxide/quantum dots on their electrochromic/energy storage performance. And the strategy is to be explored to control oriented growth of the nanowirs, size and distribution control of the quantum dots, interface matching between the nanowire and quantum dot as well as surface enhancement. In-depth investigation will be carried to unveil the mechanism of electrolyte ion storage and transport within the arrays and on the nanowires surface and interface between the nanowire and quantum dot, and a theoretical model will be constructed as well to perform the reaction kinetics. It is expected that this research will provide reliable fundamental understandings and experimental data for designing high-performance electrochromic/energy storage dual-functional materials.