Manganese oxide nanowires wrapped with nitrogen doped carbon layers for high performance supercapacitors.
J Colloid Interface Sci
; 455: 188-93, 2015 Oct 01.
Article
em En
| MEDLINE
| ID: mdl-26070189
ABSTRACT
In this study, manganese oxide nanowires wrapped by nitrogen-doped carbon layers (MnO(x)@NCs) were prepared by carbonization of poly(o-phenylenediamine) layer coated onto MnO2 nanowires for high performance supercapacitors. The component and structure of the MnO(x)@NCs were controlled through carbonization procedure under different temperatures. Results demonstrated that this composite combined the high conductivity and high specific surface area of nitrogen-doped carbon layers with the high pseudo-capacitance of manganese oxide nanowires. The as-prepared MnO(x)@NCs exhibited superior capacitive properties in 1 M Na2SO4 aqueous solution, such as high conductivity (4.167×10(-3) S cm(-1)), high specific capacitance (269 F g(-1) at 10 mV s(-1)) and long cycle life (134 F g(-1) after 1200 cycles at a scan rate of 50 mV s(-1)). It is reckoned that the present novel hybrid nanowires can serve as a promising electrode material for supercapacitors and other electrochemical devices.
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Base de dados:
MEDLINE
Assunto principal:
Óxidos
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Fenilenodiaminas
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Carbono
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Compostos de Manganês
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Nanofios
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Nitrogênio
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article