due to the increase and the world\’s current energy consumption of fossil fuel scarcity, geothermal and other renewable energy as a sustainable electricity supply concern, in addition to industrial production and most of the heat produced by the body are wasted. The thermoelectric generator (TEG) may convert waste heat to usable electric energy, and further recovering waste heat to help improve energy efficiency. Further, the heat collector may be implantable and wearable device to provide a basic solution to biological energy low power. The most widely used of the thermoelectric (TE) material is a metal oxide and a highly doped metal alloys. Traditional method of producing the TEG and hot zone melting, both methods produce a high quality factor (ZT) value. However, the energy conversion efficiency and power output are highly associated with heat transfer between the heat source and the TEG, especially in complex and dynamic surface. Due to limitations of conventional plate structure, TE materials can not form an effective heat transfer contact with the hot surfaces of complex and dynamic. Thus, subject to widely TEG complex and dynamic heat transfer efficiency of the heat surface. To solve this problem, researchers may be prepared by bonding a flexible surface of the TEG simple, however, they are not suitable for more complex and dynamic non-developable surface. Furthermore, for other TEG (by 3D printing and spray coating), dynamic tensile deformation of the surface of these electrodes may result in excessive damage to the TEG. In contrast, the stretchable TEG can work on the dynamic surface, but the present study is to use the TE or doped silicon material is deposited on a paper / polymeric substrate, this will lead to higher internal resistance and lower output power density. Current, high power TEG how to make use of in the complex and dynamic hot surfaces remains a challenge. To solve this problem, Wuhan University, the University of Southern California (USC), San Diego State University (SDSU) and the University of California, San Diego (UCSD) to develop a An extensible TEG ( S-TEG) , it can effectively fit a variety of complex and dynamic hot surface, the researchers tested the device on the body surface and the dynamic applicability skin was collected using S-TEG waste heat source provided to detect motion, heartbeat and the like health monitoring gesture event to the sensor. Related outcomes to \”Stretchable Nanolayered Thermoelectric Energy Harvester on Complex and Dynamic Surfaces \”in the title, published in\” Nano Letters \”on (Nano Lett. 2020, https://dx.doi.org/10.1021 /acs.nanolett.0c01225). Assistant Professor of mechanical Engineering at San Diego State University, Yang Yang , Ph.D., University of California, San Diego Hongjie Hu and the Central South University professor Chen Zeyu as co-first author of the paper, Wuhan University Industrial Technology Research institute Research Associate Wang Ziyu , an assistant professor at the University of California, San Diego Sheng Xu and University of Southern California professor Yong Chen for the paper co-corresponding author, participants include the University of Southern California professor Qifa Zhou , postdoctoral Laiming Jiang , Ruimin Chen , Dr. Gengxi Lu , [ 123] Jie Jin , Haochen Kang , Arizona State University assistant professor Xiangjia Li and the Wuhan Institute of Physics, University Professor Xiong Rui , stone Jing Professor .
Second, the graphic REVIEW FIG. 1A shows the silicon substrate 10 × 25 mm × 25 mm of collecting energy from waste heat in human skin 10 TE schematic coupled array. S-TEG formed in parallel and electrically in series with a pn hot leg and made of a rectangular parallelepiped .pn \”Island bridge\” layout of the electrodes assembled together, and embed in compliance super drawing silicone elastomer (of Ecoflex) (Figure 1B). in order to balance the performance of the thermoelectric device and stretchability, the cuboidOptimization of the size of 1 mm × 1 mm × 0.8 mm, to show a higher ΔT and greater stretchability. Stretchable electrode manufactured by laser ablation. The whole device can be folded, twisted and stretched, without breaking, it shows high tolerance to skin deformation.
2 (Figure 2E). S-TEG open circuit voltage and power on the tee and 110 mV respectively 137.5μW (ΔT = 18.9 K) (FIG. 2F). S-TEG on hot surfaces of the expandable and non-expandable have excellent performance, due to their excellent stretchability, and can be attached to the surface to ensure that heat transfer from the waste heat, which is essential for energy collection.
Third, the highlight summary In conclusion, the researchers describes a dynamic and adaptable complex surface heat stretchable TEG design and manufacturing. The powder was hot pressed to obtain high performance TE p-n elements and undulating serpentine conductive network provides great stretchability for the device. The flexible substrate and the electrodes may be implemented to ensure a good S-TEG adhered to the hot surface of the complex topography of the stretching process, the S-TEG in the non-deployed and deployable upper surface exhibited excellent performance. Its performance is superior to STEG previously reported. Collecting energy from the dynamic surface is a human S-TEG wearable electronics offers a potential energy solutions. May also be coupled through the p-n doubled, or by connecting a plurality of modules of energy to manufacture large and collecting waste heat from the TEG devices daily life and industrial engineering. Article link: https: //pubs.acs.org/doi/10.1021/acs.nanolett.0c01225