Bi2Te3基合金/石墨烯/PEDOT:PSS纳米复合块体材料的热电性能研究

项目名称： Bi2Te3基合金/石墨烯/PEDOT:PSS纳米复合块体材料的热电性能研究

项目编号： No.61504081

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 杜永

作者单位： 上海应用技术大学

项目金额： 20万元

中文摘要： 传统的Bi2Te3基合金/导电聚合物纳米复合块体热电材料的制备方法容易产生以下两个问题: 1) Bi2Te3基合金纳米结构难于在导电聚合物基体中有效分散；2) Bi2Te3基合金纳米结构容易氧化。这两个问题限制了Bi2Te3基合金/导电聚合物纳米复合材料热电性能的提高和热电器件的实用化。至今仍未有很好的解决方案。本课题将首次设计和采用全新的方法制备三元Bi2Te3基合金/石墨烯/PEDOT:PSS纳米复合块体热电材料。该材料能充分发挥Bi2Te3基合金(高Seebeck系数)、石墨烯(高电导率)和PEDOT:PSS(低热导率)各自的优点，产生协同效应，实现热电性能的突破。通过本课题的实施，将进一步揭示影响复合块体材料热电性能的因素，以及不同温度下复合块体材料中载流子的输运规律及输运机制，获得高性能和低密度的复合块体热电材料，加速有机-无机纳米复合热电材料在热电发电和制冷器件上的应用。

中文关键词： Bi2Te3基合金；石墨烯；PEDOT:PSS；热电材料；纳米复合材料

英文摘要： The existing techniques to prepare Bi2Te3 based alloy/conducting polymer thermoelectric nanocomposites meet problems with poor dispersion of Bi2Te3 based alloy nanostructures in conducting polymer matrices and easy oxidation of Bi2Te3 based alloy nanostructures during the preparation of nanocomposites. As a result, the improvement of the thermoelectric properties for inorganic nanostructure/conducting polymer thermoelectric nanocomposites, and the application of thermoelectric devices were greatly restricted by these two main factors. However, so far, to the best of our knowledge, no effective method to solve these problems has been reported. .In this project, a new method will be used to preparation of ternary Bi2Te3 based alloy/graphene/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) thermoelectric nanocomposite. This ternary thermoelectric nanocomposite could have a higher TE properties, by taking advantages of the properties of Bi2Te3 based alloy (high Seebeck coefficient), graphene (high electrical conductivity), and PEDOT:PSS (low thermal conductivity) to potentially have a synergistic effect, when compared the traditional inorganic nanostructure/conducting polymer nanocomposites. The influencing factors of the thermoelectic properties for the Bi2Te3 based alloy/ graphene/PEDOT:PSS bulk nanocomposites will be illuminated. The transport rules and mechanisms of the carriers at different temperatures in the bulk nanocomposites will be also clarified. This project will create new knowledge on how to design and significantly improve the thermoelectric properties of inorganic nanostructure/conducting polymer thermoelectric nanocomposites, then lead to the development of unique, high-performance thermal-to-electrical energy harvesters for generation of electricity from various waste heat resources, and cooling devices.

英文关键词： Bi2Te3 based alloy;Graphene;PEDOT:PSS ;Thermoelectric materials;Nanocomposite materials