High Seebeck Coefficient Thermally Chargeable Supercapacitor with Synergistic Effect of Multichannel Ionogel Electrolyte and Ti_(3)C_(2)T_(x) MXene-Based Composite Electrode  

作　　者：Zhongming Chen Zhijian Du La Li Kai Jiang Di Chen Guozhen Shen 

机构地区：[1]School of Mathematics and Physics,University of Science and Technology Beijing,Beijing 100083,China [2]School of Integrated Circuits and Electronics,Beijing Institute of Technology,Beijing 100081,China [3]Faculty of Hepato-Pancreato-Biliary Surgery,Chinese PLA General Hospital,Institute of Hepatobiliary Surgery of Chinese PLA&Key Laboratory of Digital Hepetobiliary Surgery,Chinese PLA,Beijing 100853,China

出　　处：《Energy & Environmental Materials》2024年第6期367-377,共11页能源与环境材料（英文）

基　　金：supported by the National Natural Science Foundation of China(52273256);Beijing Municipal Natural Science Foundation(L223006);Beijing Institute of Technology Research Found Program for Young Scholars.

摘　　要：Thermally chargeable supercapacitors can collect low-grade heat generated by the human body and convert it into electricity as a power supply unit for wearable electronics.However,the low Seebeck coefficient and heat-to-electricity conversion efficiency hinder further application.In this paper,we designed a high-performance thermally chargeable supercapacitor device composed of ZnMn_(2)O_(4)@Ti_(3)C_(2)T_(x)MXene composites(ZMO@Ti_(3)C_(2)T_(x) MXene)electrode and UIO-66 metal–organic framework doped multichannel polyvinylidene fluoridehexafluoro-propylene ionogel electrolyte,which realized the thermoelectric conversion and electrical energy storage at the same time.This thermally chargeable supercapacitor device exhibited a high Seebeck coefficient of 55.4 mV K^(−1),thermal voltage of 243 mV,and outstanding heat-to-electricity conversion efficiency of up to 6.48%at the temperature difference of 4.4 K.In addition,this device showed excellent charge–discharge cycling stability at high-temperature differences(3 K)and low-temperature differences(1 K),respectively.Connecting two thermally chargeable supercapacitor units in series,the generated output voltage of 500 mV further confirmed the stability of devices.When a single device was worn on the arm,a thermal voltage of 208.3 mV was obtained indicating the possibility of application in wearable electronics.

关 键 词：ionogel electrode Soret effect thermally chargeable supercapacitor Ti_(3)C_(2)T_(x)MXene UIO-66 MOF 

分 类 号：TM53[电气工程—电器]