title: Electrochemical Synthesis of Graphene/MnO2 Nano-Composite for Application to Supercapacitor Electrode.
abstract: Graphene/MnO2 nano-composite was electrochemically synthesized for application to an electrode material for electrochemical supercapacitors. The nanosized needle-like MnO2 was obtained by use of a graphene substrate. The prepared composite exhibited an ideal supercapacitive behavior. A capacitance retention of 94% was achieved with a 4 h deposition time (an initial capacitance of 574 mF/cm2 at a scan rate of 20 mV/s) and the retention declined with further deposition time. The results demonstrate enhanced contact between the electrode and electrolyte and improved power density as an electrochemical capacitor.
authors.forename: Kwang Ho
authors.initials: KH
authors.lastname: Jeong
authors.forename: Hyeon Jeong
authors.initials: HJ
authors.lastname: Lee
authors.forename: Michael F
authors.initials: MF
authors.lastname: Simpson
authors.forename: Mun
authors.initials: M
authors.lastname: Jeong
mesh_terms: D003460:Crystallization / Q000379:methods; D025802:Electric Capacitance; D004553:Electric Conductivity; D011211:Electric Power Supplies; D004595:Electroplating / Q000379:methods*; D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006108:Graphite / Q000737:chemistry*; D017895:Manganese Compounds / Q000737:chemistry*; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry / Q000648:ultrastructure; D008839:Microelectrodes; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D010087:Oxides / Q000737:chemistry*
chemical_list: D017895:Manganese Compounds; D010087:Oxides; D006108:Graphite; C016552:manganese dioxide