title: Two-dimensional β-MnO₂ nanowire network with enhanced electrochemical capacitance.
abstract: Conventional crystalline β-MnO2 usually exhibits poor electrochemical activities due to the narrow tunnels in its rutile-type structure. In this study, we synthesized a novel 2D β-MnO2 network with long-range order assembled by β-MnO2 nanowires and demonstrated that the novel 2D β-MnO2 network exhibits enhanced electrochemical performances. The 2D network is interwoven by crossed uniform β-MnO2 nanowires and the angle between the adjacent nanowires is about 60°. Such a novel structure makes efficient contact of β-MnO2 with electrolyte during the electrochemical process, decreases the polarization of the electrode and thus increases the discharge capacity and high-rate capability. The specific capacitance of the obtained 2D β-MnO2 network is 453.0 F/g at a current density of 0.5 A/g.
authors.affiliation: State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China.
authors.forename: Chengzhen
authors.initials: C
authors.lastname: Wei
authors.forename: Huan
authors.initials: H
authors.lastname: Pang
authors.forename: Bo
authors.initials: B
authors.lastname: Zhang
authors.forename: Qingyi
authors.initials: Q
authors.lastname: Lu
authors.forename: Shuang
authors.initials: S
authors.lastname: Liang
authors.forename: Feng
authors.initials: F
authors.lastname: Gao