超级电容器用一维钒氧基纳米管制备及赝电容性能研究

Vanadium oxide was usually used in battery. The project study VOxNTs electrochemical capacitor as high power constraint capacitance electrode materials. VOxNTs are prepared using sol-gel hydro-thermal method. The project study the influence of hydro-thermal conditions on the structure, size and morphology of the product. Research the influence of molecular size and concentration of oriented structure template on the VOxNTs layer spacing. To solve the problem of material collapse, the introduction of inorganic chelating ion with pinning role prepare the stable structure. In order to improve material electronic conductivity, one-dimensional VOx/CNTs composite materials are prepared by electrostatic self-assembly. The project study the influence of morphology and structures, surface and interface structure and properties, the non-stoichiometry and defects of materials on the capacitance. The project study the electrolyte and matching problem of electrode materials. The project research the electronic transfer mechanism, ion transfer of thermodynamics and kinetics, and the relationship of the material energy and power. Based on the above research，we could learn the energy storage mechanism of nanotubes electrode materials.

传统的钒氧化物多用于电池电极材料，本项目研究VOxNTs作为电化学电容器高功率赝电容电极材料。采用溶胶-凝胶水热法制备VOxNTs。研究水热条件对产物结构、粒度和形貌的影响。研究结构导向模板剂分子大小和浓度对VOxNTs层间距的影响，以及研究层间距与嵌脱离子之间的关系。为解决材料的塌陷问题，引入无机螯合离子，利用其"钉扎"作用稳定层结构，并研究其对主体层状结构的影响。以碳纳米管为模板剂和导电剂，通过静电自组装制备CNTs与钒氧化物的一维复合材料VOx/CNTs以提高材料电子电导率。研究形貌和结构、表面和界面结构与性质、非化学计量及缺陷等对材料法拉弟赝电容性质的影响。研究电解液和电极材料的匹配问题。研究充放电过程中电子转移机制、离子转移热力学和动力学、材料比能量与比功率之间关系。通过以上研究探知纳米管电极材料的储能机理，加深对粒度形貌与性能之间关系的认识。

传统的钒氧化物多用于电池电极材料，本项目研究钒氧化物作为电化学电容器电极材料和锂离子正极材料。采用溶胶-凝胶水热法制备VOx。采用微波溶剂热法制备钒基黄铁矾矿作为前驱体合成钒氧化物。采用无反应乳液法制备石墨化的碳包覆钒氧化物。研究水热条件对产物结构、粒度和形貌的影响。为提高材料的循环稳定性，采用过渡金属离子掺杂和石墨化碳材料的包覆，提高材料的电子导电率和结构稳定性。通过以上研究探知钒氧化物电极材料的储能机理，加深对粒度形貌与性能之间关系的认识。