期刊
JOURNAL OF POWER SOURCES
卷 256, 期 -, 页码 37-42出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2013.12.029
关键词
Template nano-fabrication; Anodic aluminum oxide; Three-dimensional; Core/shell nanotube; Atomic layer deposition; Supercapacitors
资金
- European Research Council Grant (ThreeDSurface)
- BMBF (ZIK: 3DNanoDevice)
Large-scale arrays of core/shell nanostructures are highly desirable to enhance the performance of supercapacitors. Here we demonstrate an innovative template-based fabrication technique with high structural controllability, which is capable of synthesizing well-ordered three-dimensional arrays of SnO2/MnO2 core/shell nanotubes for electrochemical energy storage in supercapacitor applications. The SnO2 core is fabricated by atomic layer deposition and provides a highly electrical conductive matrix. Subsequently a thin MnO2 shell is coated by electrochemical deposition onto the SnO2 core, which guarantees a short ion diffusion length within the shell. The core/shell structure shows an excellent electrochemical performance with a high specific capacitance of 910 F g(-1) at 1 A g(-1) and a good rate capability of remaining 217 F g(-1) at 50 A g(-1). These results shall pave the way to realize aqueous based asymmetric supercapacitors with high specific power and high specific energy. (C) 2013 Elsevier B.V. All rights reserved.
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