1. In situ synthesis of mesoporous Co3O4 nanorods anchored on reduced graphene oxide nanosheets as supercapacitor electrodes.
- Author
-
Qiu, Danfeng, Ma, Xiao, Zhang, Jingdong, Zhao, Bin, and Lin, Zixia
- Subjects
- *
COBALT oxides , *NANOROD synthesis , *MESOPOROUS materials , *SUPERCAPACITOR electrodes , *GRAPHENE oxide - Abstract
Graphical abstract Using graphene as a conductive matrix, the homogeneous distribution of Co 3 O 4 nanoparticles was accomplished and volume changes in the nanoplates during charge–discharge process were effectively accommodated, resulting in the excellent electrochemical performance of the composites. The mesoporous structure of the Co 3 O 4 nanoparticles was suitable for the transfer of Ionic electrolyte by the electrochemical reaction. Co 3 O 4 /graphene nanocomposites are a candidate material for high-capacity, low-cost, and nontoxic electrode for supercapacitors. Highlights • Co 3 O 4 /graphene composites were prepared via an in situ thermal deposition method. • Graphene serves as an efficient conductive network for electrochemical reactions. • The nanocomposites exhibited high performance as supercapacitor electrodes. Abstract In situ synthesis of mesoporous Co 3 O 4 nanoparticles embedded in reduced graphene oxide nanosheets (GNSs) was implemented through coprecipitation method and pyrolytic process. In the charge-discharge process, electrolyte ions can fill with three-dimensional GNS matrix with connected pore network structures and mesoporous Co 3 O 4 nanoparticles with uniform nanoscale structures as double ion buffer reservoirs. The capacitance value of Co 3 O 4 /GNS nanocomposites is 1085.6 F g−1 at the current density of 2 A g−1 in 2 M KOH solution. The composite has good cyclic stability, and the maximum capacitance loss is only 17.3% in 10,000 successive cycles. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF