Electrochemistry
Online ISSN : 2186-2451
Print ISSN : 1344-3542
ISSN-L : 1344-3542
Articles
Carbon Nanotubes/Graphene Composites Treated by Nitrogen-Plasma and Covered with Porous Cobalt Oxide through Galvanostatic Electrodeposition as well as Annealing for Anode Materials of Lithium-Ion Batteries
Chuen-Chang LINAn-Na WUShun-Hong JIANG
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2020 年 88 巻 1 号 p. 14-21

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Carbon nanotubes/graphene composites are grown on nickel foil without additional catalysts by chemical vapor deposition. Next, to improve the anchoring and uniform dispersing of Co(OH)2 onto carbon nanotubes/graphene composites, the carbon nanotube/graphene composites are modified by radio frequency nitrogen-plasma. Then porous Co(OH)2 thin films are galvanostatically electrodeposited onto N-doped carbon nanotubes (CNTs)/graphene composites at different currents and time periods. Finally, the porous Co(OH)2 is transformed into porous Co3O4 by annealing. The charge specific capacity (1290 mAh g−1) reaches a maximum at the galvanostatic electrodeposition condition (current = 1.5 mA and time = 300 s) for the coin cell. Furthermore, Co3O4/N-doped CNTs/graphene possesses higher charge (discharge) specific capacity and better electrochemical stability in comparison to Co3O4/CNTs/graphene for the coin cell (full cell: i.e. lithium-ion battery).

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© 2020 The Electrochemical Society of Japan
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