静电纺丝制备Te纳米线/PEDOT∶PSS热电薄膜及性能研究-中国材料进展

文章信息/Info

Title:: Study on Preparation and Properties of Te Nanowires/ PEDOT∶PSS Thermoelectric Films by Electrospinning

作者:: 孙晓萌1; 孙婷婷1; 吴鑫1; 邱小小1; 王连军1; 2; 江莞2; 3; （1. 东华大学材料科学与工程学院纤维材料改性国家重点实验室，上海 201620）（2. 东华大学先进玻璃制造技术教育部工程研究中心，上海 201620）（3. 东华大学功能材料研究所，上海 201620）

Author(s):: SUN Xiaomeng1; SUN Tingting1; WU Xin1; QIU Xiaoxiao1; WANG Lianjun1; 2; JIANG Wan2; 3; (1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials， College of Material Science and Engineering, Donghua University, Shanghai 201620, China) (2. Engineering Research Center of Advanced Glasses Manufacturing Technology, Ministry of Education, Donghua University, Shanghai 201620, China) (3. Institute of Functional Materials, Donghua University, Shanghai 201620, China)

Keywords:: PEDOT∶PSS; Te nanowire; thermoelectric films; electrospinning; wearable

摘要:: 近年来，用于健康、环境监测的可穿戴传感器和电子设备发展迅速，由此对可持续能源收集与供应技术提出了新的要求。有机柔性热电材料和装置能够将热量直接转换成电能，且凭借其固有的柔韧性、低毒性和简单易得等优点，受到越来越多的关注。静电纺丝技术是制备纳米纤维膜的常用方法，具有简单、通用、易于控制等优点，在柔性电子器件领域具有广阔的应用前景。本研究采用静电纺丝结合原位合成的方法制备了碲（Te）纳米线/PEDOT∶PSS热电纳米纤维薄膜，当碲源浓度为5%时（质量分数），Te纳米线长度最长，纤维薄膜的热电性能最佳。其电导率为1.62 S·cm-1，塞贝克系数为22.43 μV·K-1，热导率仅为~0.08 W·m-1·K-1，热电优值（ZT值）达0.112×10-3。基于此纤维薄膜成功制备了柔性热电器件，当薄膜条数为4时，在温差ΔT=45 K时，其输出电压为3.54 mV。

Abstract:: In recent years, the rapid development of wearable sensors and electronic devices for health and environmental monitoring has put forward new requirements for sustainable energy collection and supply technologies. Organic flexible thermoelectric(TE) materials and devices are capable of converting heat directly into electricity, and have attracted increasing attention due to their inherent advantages of flexibility, affordability and low toxicity. Electrostatic spinning technology is a common method to prepare nanofiber membrane, which has the advantages of simplicity, universality and easy control, and has a broad application prospect in the field of flexible electronic devices. Here, Tellurium(Te) nanowires / PEDOT∶PSS thermoelectric nanofiber thin films were prepared by electrospinning and insitu synthesis. When the content of tellurium source is 5wt%, the length of Te nanowires is the longest and the thermoelectric performance of nanofiber film is the best. The conductivity is 1.62 S·cm-1, the Seebeck coefficient is 22.43 μV·k-1, the thermal conductivity is only ~0.08 W·m-1·K-1, and the ZT value reaches 0.112×10-3. Finally, a flexible device consisting of 4 strips was successfully prepared using the as-prepared composite film，and can produce an output voltage of 3.54 mV at a 45 K temperature difference.