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Title: Oxidation-etching preparation of MnO2 tubular nanostructures for high-performance supercapacitors
Authors: Zhu, Jixin
Shi, Wenhui
Xiao, Ni
Rui, Xianhong
Tan, Huiteng
Lu, Xuehong
Hng, Huey Hoon
Ma, Jan
Yan, Qingyu
Issue Date: 2012
Source: Zhu, J., Shi, W., Xiao, N., Rui, X., Tan, H., Lu, X., (2012). Oxidation-Etching Preparation of MnO2 Tubular Nanostructures for High-Performance Supercapacitors. ACS Applied Materials & Interfaces, 4(5), 2769-2774.
Series/Report no.: ACS applied materials & interfaces
Abstract: 1D hierarchical tubular MnO2 nanostructures have been prepared through a facile hydrothermal method using carbon nanofibres (CNFs) as sacrificial template. The morphology of MnO2 nanostructures can be adjusted by changing the reaction time or annealing process. Polycrystalline MnO2 nanotubes are formed with a short reaction time (e.g., 10 min) while hierarchical tubular MnO2 nanostructures composed of assembled nanosheets are obtained at longer reaction times (>45 min). The polycrystalline MnO2 nanotubes can be further converted to porous nanobelts and sponge-like nanowires by annealing in air. Among all the types of MnO2 nanostructures prepared, tubular MnO2 nanostructures composed of assembled nanosheets show optimized charge storage performance when tested as supercapacitor electrodes, for example, delivering an power density of 13.33 kW·kg–1 and a energy density of 21.1 Wh·kg–1 with a long cycling life over 3000 cycles, which is mainly related to their features of large specific surface area and optimized charge transfer pathway.
ISSN: 1944-8244
DOI: 10.1021/am300388u
Rights: © 2012 American Chemical Society.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles

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