Flexible film and thermoelectric device of single-walled carbon nanotube@conductive metal-organic framework composite

作者：Chen, Zhijun; Cui, Yutao; Liang, Lirong; Wang, Hanfu^*; Xu, Wei^*; Zhang, Qichun^*; Chen, Guangming^*

来源：Materials Today Nano, 2022, 20: 100276.

DOI：10.1016/j.mtnano.2022.100276

• Thermoelectric
• Composites
• Metal-organic frameworks
• Flexible film
• Carbon nanotubes

Conducting metal-organic frameworks (MOFs) hold a great potential for many electronic applications because of their unique chemical and physical properties. Thermoelectric (TE) conversation based on conductive MOFs is the cutting-edge frontiers and remains great challenges, such as low electrical conductivity, rigidity, and difficulty to process. Here, a free-standing flexible film of the composite, where covalent bond grafting exists between single-walled carbon nanotubes ( SWCNTs) and porous MOF (SWCNT@Ni-1,2,5,6,9,10-triphenylenehexathiol (THT)), is prepared by a convenient vacuum filtration method. The as-fabricated SWCNT@Ni-THT composite films exhibit good flexibility and p-type TE characteristics. An optimized power factor and a maximum figure of merit are similar to 98.1 mW m(-1)/K-2 and similar to 0.037, respectively, for the composite film with 4 wt% SWCNT loading at 300 K. Furthermore, a flexible TE device connected by four rectangular films in series can generate an open-circuit voltage (VOC) of similar to 10.02 mu V and the maximum power (Pmax) of similar to 1.59 mu W at a temperature difference of 60 K. This work provides a novel way to prepare high-performance flexible films of MOF-based TE composites and demonstrates their potential applications in wearable electronics.

• 单位
  中国科学院; 国家纳米科学中心; 中国科学院研究生院