화학공학소재연구정보센터
Electrochimica Acta, Vol.233, 26-35, 2017
Facile synthesis of MnO2-Ni(OH)(2) 3D Ridge-like Porous Electrode Materials by Seed-induce Method for High-performance Asymmetric Supercapacitor
MnO2-based nanomaterials as the supercapacitor electrodes usually suffer from the poor electrical conductivity and electrochemical stability due to large volume expansion during the charge/discharge processes. In this study, the developed capacitance performance and improved long-term cycling stability of MnO2-based electrodes were obtained through designing MnO2-Ni(OH)(2) three dimensional (3D) porous hierarchical hybrid nanocomposites (MN-NF/AB) grown on the nickel foam by the aid of conductive adhesive consisting of PVDF-acetylene black (AB) seed layer via a one-step scalable hydrothermal route. The unique 3D ridge-like nanostructures with the features of porous, interconnected active nanosheets and vertically growing on the 3D nickel foam exhibit a high areal capacity (4.86C cm(-2)) and areal capacitance (10.15 F cm(-2)) at 4 mA cm(-2) in a three-electrode system, which can effectively eliminate the volume expansion-induced pulverization phenomenon for MnO2-based electrode materials, resulting in enhanced cycling stability. Furthermore, the assembled product-soft package of asymmetric supercapacitors (MN-NF/AB//active carbon) can have excellent energy storage capacity (3.62 mW h cm(-3) at 11 mW cm(-3)) and a long-term cycling stability (86% of capacitance retention at 50 mA cm(-2) after 10000 cycles). (C) 2017 Elsevier Ltd. All rights reserved.