Microwave-assisted in situ synthesis of reduced graphene oxide/Mn3O4 composites for supercapacitor applications

Reduced graphene oxide/Mn 3 O 4 (GM) composites were prepared by a simple and convenient strategy, that is, microwave irradiation of the hydrothermal product of reduced graphene oxide-Mn(NO 3 ) 2 mixtures. Mn 3 O 4 nanoparticles with sizes of 20-50 nm were uniformly distributed on the surface of red...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:RSC advances 2015-01, Vol.5 (56), p.4561-4567
Hauptverfasser: Zhang, Haiyan, Huang, Zidong, Li, Yunyong, Chen, Yiming, Wang, Wenguang, Ye, Yipeng, Deng, Peng
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Reduced graphene oxide/Mn 3 O 4 (GM) composites were prepared by a simple and convenient strategy, that is, microwave irradiation of the hydrothermal product of reduced graphene oxide-Mn(NO 3 ) 2 mixtures. Mn 3 O 4 nanoparticles with sizes of 20-50 nm were uniformly distributed on the surface of reduced graphene oxides. The GM composites exhibited good electrochemical performance with a specific capacitance of 344.8 F g −1 at the discharge current density of 1 A g −1 using 5 M NaOH as the electrolyte. The energy density of the GM composites was as high as 47.8 W h kg −1 with a power density of 1000 W kg −1 . After 5000 cycles of charge/discharge experiments, a high level retaining specific capacitance of 342.1 F g −1 was obtained with 99.2% retention of the initial capacitance at 1 A g −1 and the equivalent series resistance of the GM composites system was much lower than that of pure Mn 3 O 4 . Therefore, the GM composites with large capacitance, good cycling performance and reversibility can be used as a promising electrode material for supercapacitor applications. Rationally designed reduced graphene oxide/Mn 3 O 4 (GM) was achieved and GM showed long-stability capacitance after 5000 cycles at 1 A g −1 .
ISSN:2046-2069
DOI:10.1039/c5ra05946a