The AgIn_(5)Se_(8) diamond-like compound with low thermal conductivity is deemed to be a promising thermoelectric material,but its performance is limited by its low electrical conductivity.Herein,we report an effectiv...The AgIn_(5)Se_(8) diamond-like compound with low thermal conductivity is deemed to be a promising thermoelectric material,but its performance is limited by its low electrical conductivity.Herein,we report an effective method to increase the maximum and average zT values of AgIn_(5)Se_(8)-based compounds by adding excess Ag.All the samples exhibit increased carrier concentrations of ~10^(18) cm^(-3) at ambient temperature,leading to considerably enhanced electrical conductivity.Meanwhile,the excess Ag creates numerous point defects,twin boundaries and stacking faults,which serve as the internal-strain field to induce additional phonon scattering and lattice softening to lower the lattice thermal conductivity.The synergistic strategy yields a peak zT value of 0.67 at 883 K and an average zT value of 0.34 from 323 to 883 K for Ag_(1.03)In_(5)Se_(8).展开更多
Calix[4]quinone(C4Q)is a high-capacity organic cathode material,but its solubility in conventional organic electrolytes causes capacity decay,which leads to unavoidable restrictions in the practical application.Our pr...Calix[4]quinone(C4Q)is a high-capacity organic cathode material,but its solubility in conventional organic electrolytes causes capacity decay,which leads to unavoidable restrictions in the practical application.Our previous research has revealed that the dissolution of C4Q can be effectively restricted by encapsulating it in CMK-3,but there is still room for improvement in its circulation performance and rate capability.展开更多
基金financially supported in part by the Fundamental Research Funds for the Central Universities 2018CDYJSY0055 and No.106112017CDJQJ308821)National Natural Science Foundation of China(Grant No.51772035,11674040,and 51472036)+3 种基金the Graduate Scientific Research and Innovation Foundation of Chongqing,China,Grant No.CYB 19064,the CSC scholarship(No.201806050180)2019 ITS Summer Fellowshipfinancially supported by the Key Research Program of Frontier Sciences,CAS,Grant No.QYZDB-SSW-SLH016the Project for Fundamental and Frontier Research in Chongqing(CSTC2015JCYJBX0026 and CSTC2017JCYJAX0388).
文摘The AgIn_(5)Se_(8) diamond-like compound with low thermal conductivity is deemed to be a promising thermoelectric material,but its performance is limited by its low electrical conductivity.Herein,we report an effective method to increase the maximum and average zT values of AgIn_(5)Se_(8)-based compounds by adding excess Ag.All the samples exhibit increased carrier concentrations of ~10^(18) cm^(-3) at ambient temperature,leading to considerably enhanced electrical conductivity.Meanwhile,the excess Ag creates numerous point defects,twin boundaries and stacking faults,which serve as the internal-strain field to induce additional phonon scattering and lattice softening to lower the lattice thermal conductivity.The synergistic strategy yields a peak zT value of 0.67 at 883 K and an average zT value of 0.34 from 323 to 883 K for Ag_(1.03)In_(5)Se_(8).
基金the financial support from the National Natural Science Foundation of China(No.21403187 and 21875206)the China Postdoctoral Science Foundation(No.2015T80229)the Hebei Higher Education Institutions of China(No.ZD2016086).
文摘Calix[4]quinone(C4Q)is a high-capacity organic cathode material,but its solubility in conventional organic electrolytes causes capacity decay,which leads to unavoidable restrictions in the practical application.Our previous research has revealed that the dissolution of C4Q can be effectively restricted by encapsulating it in CMK-3,but there is still room for improvement in its circulation performance and rate capability.
