Highly porous honeycomb manganese oxide@carbon fibers core-shell nanocables for flexible supercapacitors

被引：65

作者：

Zhang, Deyang ^{[1
]}

Zhang, Yihe ^{[1
]}

Luo, Yongsong ^{[2
]}

Chu, Paul K. ^{[3
]}

机构：

[1] China Univ Geosci, Sch Mat Sci & Technol, Natl Lab Mineral Mat, Beijing Key Lab Mat Utilizat Nonmetall Minerals &, Beijing 100083, Peoples R China

[2] Xinyang Normal Univ, Sch Phys & Elect Engn, Xinyang 464000, Peoples R China

[3] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon 999077, Hong Kong, Peoples R China

来源：

NANO ENERGY | 2015年 / 13卷

关键词：

Flexible supercapacitors; Manganese oxide; Honeycomb; Carbon fibers; NANOSTRUCTURED MATERIALS; ELECTRODE MATERIALS; ARRAYS; COMPOSITES; NANOWIRES; TEXTILES;

D O I：

10.1016/j.nanoen.2015.01.047

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Core-shell electrodes composed of highly porous honeycomb manganese oxide@carbon fibers (HMO@CFs) are synthesized by a facile hydrothermal approach involving an in situ redox replacement reaction between potassium permanganate (KMnO4) and carbon fibers. In this reaction, the carbon fibers serve as not only a sacrificial reductant, but also the substrate. The porous HMO@CFs core shell nanocables deliver remarkable electrochemical performance with a high capacitance (295.24 F g(-1) at 100 mA g(-1)), high good rate capability, and superior cycling stability (about 96.4% specific capacitance retained after 3000 cycles). The maximum energy density of 22.2 W h kg(-1) (at a power density of 400 W kg(-1)) and power density of 12,000 W kg(-1) (at an energy density of 10W h kg(-1)) can be achieved at an operating voltage of 1.6 V. The fabrication method is simple, cost-effective, and readily scalable thereby having large commercial potential. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：47 / 57

页数：11

共 48 条

[1] Nanostructured materials for advanced energy conversion and storage devices [J].