One-pot synthesis of thin Co(OH) sub(2) nanosheets on graphene and their high activity as a capacitor electrode

One-pot synthesis of thin Co(OH) sub(2) nanosheets on graphene and their high activity as a capacitor electrode

We synthesized Co(OH) sub(2)/graphene composites from graphite without a graphene oxide (GO) step. The Co(OH) sub(2)/graphene composite exhibited a specific capacitance of 960 F g super(-1) at a current density of 10 A g super(-1). In addition, after 5000 cycles of charge/discharge operation, the Co...

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Veröffentlicht in:RSC advances 2014-10, Vol.4 (93), p.51619-51623
Hauptverfasser: Jeong, Gyoung Hwa, Lee, Hae-Min, Lee, Heewoong, Kim, Chang-Koo, Piao, Yuanzhe, Lee, Jae-Hyeok, Kim, Jae-Ho, Kim, Sang-Wook
Format: Artikel
Sprache:eng
Schlagworte:
Capacitance
Current density
Discharge
Electrodes
Graphene
Graphite
Oxides
Synthesis
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Zusammenfassung:We synthesized Co(OH) sub(2)/graphene composites from graphite without a graphene oxide (GO) step. The Co(OH) sub(2)/graphene composite exhibited a specific capacitance of 960 F g super(-1) at a current density of 10 A g super(-1). In addition, after 5000 cycles of charge/discharge operation, the Co(OH) sub(2)/graphene composite maintained its initial specific capacitance value of 93.4% at a current density of 30 A g super(-1).
ISSN:2046-2069
DOI:10.1039/c4ra10130h