J. Mater. Sci. Technol. ›› 2024, Vol. 179: 79-85.DOI: 10.1016/j.jmst.2023.08.059

• Research Article • Previous Articles     Next Articles

High thermoelectric performance of flexible Ag/Ag2 Se composite film on nylon for low-grade energy harvesting

Ying Liua,b,c, Jiajia Lia,b,c, Zixing Wanga, Ping Weid, Wenyu Zhaod, Lidong Chenb,c, Kefeng Caia   

  1. aKey Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Shanghai Key Laboratory of Development and Application for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai 201804, China;
    bState Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;
    cUniversity of Chinese Academy of Sciences, Beijing 100049, China;
    dState Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
  • Received:2023-06-20 Revised:2023-08-08 Accepted:2023-08-11 Published:2024-04-20 Online:2024-04-15
  • Contact: *E-mail addresses: pingwei@whut.edu.cn (P. Wei), kfcai@tongji.edu.cn (K. Cai).

Abstract: In this work, Ag/Ag2 Se composite films with excellent thermoelectric (TE) properties and flexibility are prepared based on a simple one-pot method. By adjusting the nominal ratios of Ag/Se, an optimal Ag/Ag2 Se composite film shows a large power factor of ∼2275 μW m-1 K-2 at 300 K. Such an outstand-ing TE performance of the composite film is due to the unique microstructure and the synergistic effect between the Ag and Ag2 Se. Meanwhile, the composite film also shows outstanding flexibility ( ∼91.8% of the initial electrical conductivity is maintained, and the S is unchanged after 1500 bending cycles with a bending radius of 4 mm). Furthermore, a 4-leg flexible TE generator assembled with the optimal film produces a voltage of 14.06 mV and 4.96 μW at a temperature difference of 30.4 K. This work provides a new inspiration for the preparation of flexible Ag2 Se-based films with excellent TE performance near room temperature.

Key words: Thermoelectric, Ag/Ag2 Se, Flexible, Film, Power generator