Flexible micro-scale energy storage devices as the key component to power the flexible miniaturized electronic devices are attracting extensive attention. In this study, interdigitated asymmetric all-solidstate flexib...Flexible micro-scale energy storage devices as the key component to power the flexible miniaturized electronic devices are attracting extensive attention. In this study, interdigitated asymmetric all-solidstate flexible micro-supercapacitors（MSCs） were fabricated by a simple pencil drawing process followed by electrodepositing MnO_2 on one of the as-drawn graphite electrode as anode and the other as cathode.The as-prepared electrodes showed high areal specific capacitance of 220 μF/cm^2 at 2.5 μA/cm^2. The energy density and the corresponding power density of the resultant asymmetrical flexible MSCs were up to 110 μWh/cm^2 and 1.2 μW/cm^2, respectively. Furthermore, excellent cycling performance（91% retention of capacity after 1000 cycles） was achieved. The resultant devices also exhibited good electrochemical stability under bending conditions, demonstrating superior flexibility. This study provides a simple yet efficient methodology for designing and fabricating flexible supercapacitors applicable for portable and wearable electronics.展开更多
基金financial support from the National Key Basic Research Program of China(Nos.2014CB648300,2017YFB0404501)the National Natural Science Foundation of China(Nos.21422402,21674050)+7 种基金the Natural Science Foundation of Jiangsu Province(Nos.BK20140060,BK20140865,BM2012010)Program for Jiangsu Specially-Appointed Professors(No.RK030STP15001)the NUPT“1311 Project”and Scientific Foundation(Nos.NY213119,NY213169)the Leading Talent of Technological Innovation of National Ten-Thousands Talents Program of Chinathe Excellent Scientific and Technological Innovative Teams of Jiangsu Higher Education Institutions(No.TJ217038)the Synergetic Innovation Center for Organic Electronics and Information Displaysthe Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)the 333 Project of Jiangsu Province(Nos.BRA2017402,BRA2015374)
文摘Flexible micro-scale energy storage devices as the key component to power the flexible miniaturized electronic devices are attracting extensive attention. In this study, interdigitated asymmetric all-solidstate flexible micro-supercapacitors（MSCs） were fabricated by a simple pencil drawing process followed by electrodepositing MnO_2 on one of the as-drawn graphite electrode as anode and the other as cathode.The as-prepared electrodes showed high areal specific capacitance of 220 μF/cm^2 at 2.5 μA/cm^2. The energy density and the corresponding power density of the resultant asymmetrical flexible MSCs were up to 110 μWh/cm^2 and 1.2 μW/cm^2, respectively. Furthermore, excellent cycling performance（91% retention of capacity after 1000 cycles） was achieved. The resultant devices also exhibited good electrochemical stability under bending conditions, demonstrating superior flexibility. This study provides a simple yet efficient methodology for designing and fabricating flexible supercapacitors applicable for portable and wearable electronics.
