Negedu Solomon Demiss, Tromer Raphael, Gowda Chinmayee Chowde, Woellner Cristiano F, Olu Femi Emmanuel, Roy Ajit K, Pandey Prafull, Galvao Douglas S, Ajayan Pulickel M, Kumbhakar Partha, Tiwary Chandra S
Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, West Bengal, 721302, India.
Materials Science and Engineering, Jimma Institute of Technology, Jimma University, Jimma, Ethiopia.
Nanoscale. 2022 Jun 1;14(21):7788-7797. doi: 10.1039/d2nr00132b.
Two-dimensional (2D) materials have been shown to be efficient in energy harvesting. Here, we report the use of waste heat to generate electricity the combined piezoelectric and triboelectric properties of 2D cobalt telluride (CoTe). The piezo-triboelectric nanogenerator (PTNG) produced an open-circuit voltage of ∼5 V under 1 N force and the effect of temperature in the range of 305-363 K shows a four-fold energy conversion efficiency improvement. The 2D piezo-tribogenerator shows excellent characteristics with a maximum voltage of ∼10 V, fast response time, and high responsivity. Density functional theory was used to gain further insights and validation of the experimental results. Our results could lead to energy harvesting approaches using 2D materials from various thermal sources and dissipating waste heat from electronic devices.
二维（2D）材料已被证明在能量收集方面效率很高。在此，我们报告利用二维碲化钴（CoTe）的压电和摩擦电组合特性，通过废热来发电。压电摩擦电纳米发电机（PTNG）在1 N力作用下产生约5 V的开路电压，在305 - 363 K温度范围内，其能量转换效率提高了四倍。二维压电摩擦发电机具有优异的特性，最大电压约为10 V，响应时间快，响应度高。采用密度泛函理论进一步深入了解并验证实验结果。我们的研究结果可能会带来利用二维材料从各种热源收集能量以及消散电子设备废热的能量收集方法。
