To address the energy storage needs of wearable electronics,this study developed highperformance,flexible micro-supercapacitors(MSCs)using 2D and 3D patterned fabric-based microelectrodes.The 2D electrodes were create...To address the energy storage needs of wearable electronics,this study developed highperformance,flexible micro-supercapacitors(MSCs)using 2D and 3D patterned fabric-based microelectrodes.The 2D electrodes were created via a screen-printing method with an omnidirectional pre-stretching strategy,while 3D array-structured electrodes were formed through electrostatic actuation.Nano-MnO_(2)and Na0.77MnO_(2)were deposited to enhance pseudo-capacitive storage and widen the electrochemical window.The C-C/MnO_(2)-based MSCs exhibited a 21%pseudo-capacitance ratio,achieving an area-specific capacitance of 118.2 mF cm^(-2)at 5 mV s^(-1)and an energy density of 39.25 mWh cm^(-2)at 0.21 mW cm^(-2).These MSCs maintained 95.05%,92.04%,and 89.74%of their capacitance under stretched,twisted,and folded conditions,respectively,and showed stable performance across temperatures from^(-2)0℃to 60℃.Additionally,C-C/Na0.77MnO_(2)-based MSCs extended the electrochemical window to 1.6 V and retained 100.2%capacitance after 6500 cycles.This work offers innovative strategies for advancing portable and wearable electronic devices.展开更多
基金supported by Scientific Research Project for Higher Education Institution in Hebei Province(No.BJK2023085)Natural Science Foundation Project of Hebei Province(E2024208048)+1 种基金National Natural Science Foundation of China(Grant No.22005083)Introduction of talents Research Funds for the Hebei University of Science and Technology(No.PYA2018012).
文摘To address the energy storage needs of wearable electronics,this study developed highperformance,flexible micro-supercapacitors(MSCs)using 2D and 3D patterned fabric-based microelectrodes.The 2D electrodes were created via a screen-printing method with an omnidirectional pre-stretching strategy,while 3D array-structured electrodes were formed through electrostatic actuation.Nano-MnO_(2)and Na0.77MnO_(2)were deposited to enhance pseudo-capacitive storage and widen the electrochemical window.The C-C/MnO_(2)-based MSCs exhibited a 21%pseudo-capacitance ratio,achieving an area-specific capacitance of 118.2 mF cm^(-2)at 5 mV s^(-1)and an energy density of 39.25 mWh cm^(-2)at 0.21 mW cm^(-2).These MSCs maintained 95.05%,92.04%,and 89.74%of their capacitance under stretched,twisted,and folded conditions,respectively,and showed stable performance across temperatures from^(-2)0℃to 60℃.Additionally,C-C/Na0.77MnO_(2)-based MSCs extended the electrochemical window to 1.6 V and retained 100.2%capacitance after 6500 cycles.This work offers innovative strategies for advancing portable and wearable electronic devices.
