Anionic entanglement-induced giant thermopower in ionic thermoelectric material Gelatin-CF_(3)SO_(3)K–CH_(3)SO_(3)K  

作　　者：Qikai Li Cheng-Gong Han Shuaihua Wang Cai-Chao Ye Xinbo Zhang Xiao Ma Tao Feng Yuchen Li Weishu Liu 

机构地区：[1]Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong 518055,China [2]Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices,Southern University of Science and Technology,Shenzhen 518055,China [3]Department of Mechanical Engineering,The University of Hong Kong,Pokfulam Road 999077,Hong Kong,China [4]Center for Advanced Analytical Science,Guangzhou Key Laboratory of Sensing Materials and Devices,Guangdong Engineering Technology Research Center for Photoelectric Sensing Materials and Devices,School of Chemistry and Chemical Engineering,Guangzhou University,Guangzhou 510006,China

出　　处：《eScience》2023年第5期105-112,共8页电化学与能源科学（英文）

基　　金：supported by the Shenzhen Natural Science Funds for Distinguished Young Scholar(No.RCJC20210706091949018);the Shenzhen Sci-Tech Fund(KYTDPT20181011104007);the Shenzhen DRC project([2018]1433);the Guangdong Innovative and Entrepreneurial Research Team Program Project(2016ZT06G587);the Tencent Foundation through the XPLORER PRIZE,and the Centers for Mechanical Engineering Research and Education at MIT and SUSTech.

摘　　要：Ionic thermoelectric(i-TE)technologies can power Internet of Things(IoT)sensors by harvesting thermal energy from the environment because of their large thermopowers.Present research focuses mostly on using the interactions between ions and matrices to enhance i-TE performance,but i-TE materials can benefit from utilizing different methods to control ion transport.Here,we introduced a new strategy that employs an ion entanglement effect.A giant thermopower of 28 mV K^(-1)was obtained in a quasi-solid-state i-TE Gelatin-CF_(3)SO_(3)K–CH_(3)SO_(3)K gel via entanglement between CF_(3)SO_(3)^(-)and CH_(3)SO_(3)^(-)anions.The anionic entanglement effect involves complex interactions between these two anions,slowing anionic thermodiffusion and thus suppressing bipolar effects and boosting p-type thermopower.A Au@Cu|Gelatin-CF_(3)SO_(3)K–CH_(3)SO_(3)K|Au@Cu i-TE device with a generator mode delivers a specific output energy density of 67.2 mJ m^(-2)K^(-2)during 2 h of discharging.Long-term operation.

关 键 词：THERMOPOWER THERMODIFFUSION Ion interactions Energy harvesting GELATIN 

分 类 号：TM910.4[电气工程—电力电子与电力传动]