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|Title:||MnO₂ nanostructures with three-dimensional (3D) morphology replicated from diatoms for high-performance supercapacitors|
|Other Titles:||MnO(2) nanostructures with three-dimensional (3D) morphology replicated from diatoms for high-performance supercapacitors|
|Citation:||Journal of Materials Chemistry A, 2015; 3(15):7855-7861|
|Publisher:||Royal Society of Chemistry|
|Fei Li, Yuan Xing, Ming Huang, Kai Lin Li, Ting Ting Yu, Yu Xin Zhang and Dusan Losic|
|Abstract:||Herein, we demonstrate the synthesis of size- and shape-controlled MnO2 nanostructures by replica molding from diatom silica structures for high-performance supercapacitors. Three types of hierarchical hollow MnO2 patterns with different three-dimensional (3D) structures, shapes and large surface areas were successfully prepared from three diatom species by a template-assisted hydrothermal process. The extraordinary precision and nano-scale resolution of 3D replications of complex biological architecture from diatoms to artificial MnO2 structures are confirmed. Detailed electrochemical measurements reveal that the Melosira-type MnO2 pattern exhibits not only a high specific capacitance of 371.2 F g−1 at a scan rate of 0.5 A g−1, but also relatively good cycle stability (93.1% capacitance retention after 2000 cycles at a scan rate of 5 A g−1), demonstrating a promising application as supercapacitor electrode materials.|
|Description:||First published online 25 Feb 2015|
|Rights:||This journal is © The Royal Society of Chemistry 2015|
|Appears in Collections:||IPAS publications|
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