Three-dimensional carbon foam-metal oxide-based asymmetric electrodes for high-performance solid-state micro-supercapacitors.
Nanoscale
; 13(46): 19453-19465, 2021 Dec 02.
Article
em En
| MEDLINE
| ID: mdl-34790988
ABSTRACT
A three-dimensional carbon foam (CF)-based asymmetric planar micro-supercapacitor is fabricated by the direct spray patterning of active materials on an array of interdigital electrodes. The solid-state asymmetric micro-supercapacitor comprises the CF network with pseudocapacitive metal oxides (manganese oxide (MnO), iron oxide (Fe2O3)), where CF-MnO composite as a positive electrode, and CF-Fe2O3 as negative electrode for superior electrochemical performance. The micro-supercapacitor, CF-MnO//CF-Fe2O3, attains an ultrahigh supercapacitance of 18.4 mF cm-2 (2326.8 mF cm-3) at a scan rate of 5 mV s-1. A wider potential window of 1.4 V is achieved with a high energy density of 5 µW h cm-2. The excellent cyclic stability is confirmed by 86.1% capacitance retention after 10 000 electrochemical cycles.
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Base de dados:
MEDLINE
Idioma:
En
Revista:
Nanoscale
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
Índia