高性能柔性自支撑CNFs@UIO-66@PANI复合膜电极材料的制备及应用OA北大核心CSTPCD

UIO-66 nanolayers were grown in situ on the surface of flexible CNFs by solvothermal reaction,then polyaniline (PANI) was deposited on the surface of CNFs@UIO-66 by in-situ polymerization.The flexible films were obtained by filtration and assembled into flexible solid-state supercapacitors.The effects of CNFs/UIO-66 ratio and ANI concentration on the electrochemical properties of CNFs@UIO-66@PANI composite membrane were investigated.The results show that the ratio of CNFs to UIO-66 has a critical effect on the electrochemical performances of the composite membrane.The specific capacitance of the composite membrane decreases from 1287 F·g-1 to 554 F·g-1 when the CNF/UIO-66 ratio decreases from 1∶1 to 1︰3 at a current density of 1 A·g-1.Furthermore,at 200 W·kg-1 power density and 47.39 Wh·kg-1 energy density,the assembled supercapacitor shows extremely high cycle stability with capacitance retentions of 100％ after 5000 continuous charge-discharge cycles.This study provides a pathway to develop CNFs@UIO-66@PANI based flexible energy storage devices.