title: Series asymmetric supercapacitors based on free-standing inner-connection electrodes for high energy density and high output voltage.
abstract: Asymmetric supercapacitors (ASCs) based on free-standing membranes with high energy density and high output voltage are reported. MnO(2) nanowire/carbon nanotube (CNT) composites and MoO(3) nanobelt/CNT composites are selected as the anode and the cathode materials of the devices, respectively. The ASC has a high volumetric capacitance of 50.2 F cm(-3) at a scan rate of 2 mV s(-1) and a high operation voltage window of 2.0 V. Especially, after a middle layer with an inner-connection structure was inserted between the anode and the cathode, the output voltage of the whole device can achieve 4.0 V. The full cell of series ASCs (SASC) with an inner-connection middle layer has a high energy density of 28.6 mW h cm(-3) at a power density of 261.4 mW cm(-3), and exhibits excellent cycling performance of 99.6% capacitance retention over 10,000 cycles. This strategy of designing the hybridized structure for SASCs provides a promising route for next-generation SCs with high energy density and high output voltage.
authors.affiliation: Center for Nanoscale Characterization & Devices (CNCD), Wuhan National Laboratory for Optoelectronics (WNLO)-School of Physics, Huazhong University of Science and Technology (HUST), LuoyuRoad 1037, Wuhan 430074, P. R. China. gaoyihua@hust.edu.cn nishuang_liu@foxmail.com.
authors.forename: Jiayou
authors.initials: J
authors.lastname: Tao
authors.forename: Nishuang
authors.initials: N
authors.lastname: Liu
authors.forename: Jiangyu
authors.initials: J
authors.lastname: Rao
authors.forename: Longwei
authors.initials: L
authors.lastname: Ding
authors.forename: Majid Raissan
authors.initials: MR
authors.lastname: Al Bahrani
authors.forename: Luying
authors.initials: L
authors.lastname: Li
authors.forename: Jun
authors.initials: J
authors.lastname: Su
authors.forename: Yihua
authors.initials: Y
authors.lastname: Gao