文献类型：期刊文献

英文题名：Adaptable and Wearable Thermocell Based on Stretchable Hydrogel for Body Heat Harvesting

作者：Xu, Cheng[1,2,3,4];Sun, Yong[3,4];Zhang, Junji[1,2];Xu, Wei[3,4];Tian, He[1,2]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Ctr Materiobiol & Dynam Chem, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Joint Int Res Lab Precis Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Ctr Materiobiol & Dynam Chem, Shanghai 200237, Peoples R China;[3]Chinese Acad Sci, Inst Chem, Key Lab Organ Solids, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China;[4]Univ Chinese Acad Sci, Beijing 100049, Peoples R China

年份：2022

卷号：12

期号：42

外文期刊名：ADVANCED ENERGY MATERIALS

收录：;EI(收录号：20223912783070);WOS:【SCI-EXPANDED(收录号:WOS:000850308500001)】；

基金：The authors thank the NSFC (21788102, 22122803, and 21878086), Shanghai Municipal Science and Technology Major Project (2018SHZDZX03), the international cooperation program of Shanghai Science and Technology Committee (17520750100), the Fundamental Research Funds for the Central Universities (222201717003), and the National Key R&D Program of China (Grant No. 2017YFA0204701).

语种：英文

外文关键词：body-conformable devices; thermocells; thermogalvanics; wearable electronics

摘要：The application of traditional inorganic thermoelectric materials to wearable energy harvesters has been hindered by the rigid bulkiness, while flexible organic conductive polymers have been long troubled by their intrinsic low thermopower. An ideal solution that possesses the merits of the two thermoelectric materials is desperately needed for practical application. Here it is demonstrated that a polyacrylamide (PAAm)-based ultra-stretchable hydrogel can be selected as a superior candidate matrix for flexible and stretchable thermocells to adapt to the curved surface of the human body and deformation of the ankle. Fe(ClO4)(3)/Fe(ClO4)(2) is selected as n-type ion pair for their comparable thermoelectric performance to K-3[Fe(CN)(6)]/K-4[Fe(CN)(6)]. The p-n pair hydrogel electrolytes show a voltage output of 29 mV and current output of 8.5 Am-2 with an average maximum power density of 0.66 mW K-2 m(-2) for each p-n cell (Delta T = 10 K). By integrating with the graphite paper electrode, a body-conformal and portable thermocell device, employing the hydrogel electrolytes, is fabricated and reached a voltage output of 0.16 V with 14 pairs of p-n cells (Delta T = 4.1 K). This commercially-effective blueprint demonstrates the bright future of hydrogel-based ionic thermocell in daily wearable scenarios.