期刊
ACS Applied Materials & Interfaces
卷 8, 期 46, 页码 31602-31610出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b08165
关键词
rGO/BiVO4; fern/dendritic structures; hydrothermal method; high energy density; symmetric supercapacitor; Ragone plot
资金
- Ministry of Electronics and Information Technology (MeitY, New Delhi, India)
- INSPIRE faculty program (DST, New Delhi)
- Spanish Miisterio MINECO [MAT2015-68394-R]
- Co-fund programme of the Marie Curie Actions of the seventh R&D Framework Programme of the European Union
- AGAUR (Generalitat de Catalunya) [2014_SGR_1505]
Herein, we demonstrate the synthesis of rGO/BiVO4 hybrid nanostructures by facile hydrothermal method. Morphological studies reveal that rGO sheets are embedded in the special dendritic fern-like structures of BiVO4. The rGO/BiVO4 hybrid architecture shows the way to a rational design of supercapacitor, since these structures enable easy access of electrolyte ions by reducing internal resistance. Considering the unique morphological features of rGO/BiVO4 hybrid nanostructures, their supercapacitive properties were investigated. The rGO/BiVO4 electrode exhibits a specific capacitance of 151 F/g at the current density of 0.15 mA/cm(2). Furthermore, we have constructed rGO/BiVO4 symmetric cell which exhibits outstanding volumetric energy density of 1.6 mW h/cm(3) (33.7 W h/kg) and ensures rapid energy delivery with power density of 391 mW/cm(3) (8.0 kW/kg). The superior properties of symmetric supercapacitor can be attributed to the special dendritic fern-like BiVO4 morphology and intriguing physicochemical properties of rGO.
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