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.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Wei C,Pang H,Zhang B,Lu Q,Liang S,Gao F

doi

10.1038/srep02193

subject

Has Abstract

pub_date

2013-01-01 00:00:00

pages

2193

issn

2045-2322

pii

srep02193

journal_volume

3

pub_type

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