Kashyap Ankit, Rawat Divya, Sarkar Debattam, Singh Niraj Kumar, Biswas Kanishka, Soni Ajay
School of Physical Sciences, Indian Institute of Technology Mandi, Mandi, 175075, Himachal Pradesh, India.
New Chemistry Unit, International Centre for Materials Science and School of Advanced Materials, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur, Bangalore, 560064, India.
Angew Chem Int Ed Engl. 2024 Mar 11;63(11):e202401234. doi: 10.1002/anie.202401234. Epub 2024 Feb 6.
Flexible thermoelectric devices of nanomaterials have shown a great potential for applications in wearable to remotely located electronics with desired shapes and geometries. Continuous powering up the low power flexible electronics is a major challenge. We are reporting a flexible thermoelectric module prepared from silver telluride (Ag Te) nanowires (NWs), which are chemically transformed from uniquely synthesized and scalable tellurium (Te) NWs. Conducting Ag Te NWs composites have shown an ultralow total thermal conductivity ~0.22 W/mK surpassing the bulk melt-grown Ag Te ~1.23 W/mK at ~300 K, which is attributed to the nanostructuring of the material. Flexible thermoelectric device consisting of 4 legs (n-type) of Ag Te NWs on polyvinylidene fluoride membrane displays a significant output voltage (V ) ~2.3 mV upon human touch and V ~18 mV at temperature gradient, ΔT ~50 K, which shows the importance of NWs based flexible thermoelectric devices to power up the low power wearable electronics.
纳米材料的柔性热电器件在可穿戴设备到具有所需形状和几何结构的远程电子设备中显示出巨大的应用潜力。持续为低功耗柔性电子设备供电是一项重大挑战。我们报道了一种由碲化银（Ag₂Te）纳米线（NWs）制备的柔性热电模块，这些纳米线是由独特合成且可扩展的碲（Te）纳米线化学转化而来。导电的Ag₂Te NWs复合材料在约300K时显示出超低的总热导率0.22W/mK，超过了块状熔体生长的Ag₂Te的1.23W/mK，这归因于材料的纳米结构。由聚偏二氟乙烯膜上的4条Ag₂Te NWs腿（n型）组成的柔性热电器件在人体触摸时显示出显著的输出电压（V）2.3mV，在温度梯度ΔT50K时V~18mV，这表明基于NWs的柔性热电器件对于为低功耗可穿戴电子设备供电的重要性。
