MXene has great potential in the application of thermoelectric materials due to its high conductivity,but its application in this field is limited by the low Seebeck coefficient.In this work,a laminated composite film...MXene has great potential in the application of thermoelectric materials due to its high conductivity,but its application in this field is limited by the low Seebeck coefficient.In this work,a laminated composite film with a regular 2-dimensional heterogeneous interface was constructed by using 2-dimensional MXene and TiS_(2).The results show that the sandwich structure composite film has a high Seebeck coefficient(−80.4μV K^(-1))while maintaining a high electrical conductivity(322.12 S cm^(-1)).The power factor of the sandwich structure film is higher than that of the disordered structure film,which is 22 times that of the Ti_(3)C_(2)T_(x) film.The simple flexible device prepared by MTM film has an ideal power density(26.6 W m^(-2))at a temperature difference of 70 K.This work provides strong evidence and feasible reference for optimizing and improving the thermoelectric properties of MXene-based materials by using high-quality heterostructures.展开更多
基金supported by the National Key Research and Development Program of China(No.2022YFB3803900)the National Natural Science Foundation of China(52073128,22065013,52272214,and 52372082)+2 种基金Jiangxi Province Key Laboratory of Flexible Electronics(2024SSY03021)the Natural Science Foundation of Jiangxi Province(20232BAB204023)Jiangxi Provincial Department of Education(GJJ211109 and GJJ2201334).
文摘MXene has great potential in the application of thermoelectric materials due to its high conductivity,but its application in this field is limited by the low Seebeck coefficient.In this work,a laminated composite film with a regular 2-dimensional heterogeneous interface was constructed by using 2-dimensional MXene and TiS_(2).The results show that the sandwich structure composite film has a high Seebeck coefficient(−80.4μV K^(-1))while maintaining a high electrical conductivity(322.12 S cm^(-1)).The power factor of the sandwich structure film is higher than that of the disordered structure film,which is 22 times that of the Ti_(3)C_(2)T_(x) film.The simple flexible device prepared by MTM film has an ideal power density(26.6 W m^(-2))at a temperature difference of 70 K.This work provides strong evidence and feasible reference for optimizing and improving the thermoelectric properties of MXene-based materials by using high-quality heterostructures.
