Single step hydrothermal synthesis of carbon nanodot decorated V{sub 2}O{sub 5} nanobelts as hybrid conducting material for supercapacitor application

Journal Article · Fri Sep 15 04:00:00 EDT 2017 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/J.JSSC.2017.05.035· OSTI ID:22742029

Narayanan, Remya

Carbon nanodot (C-dot) decorated V{sub 2}O{sub 5} (C-dot@V{sub 2}O{sub 5}) nanobelts are synthesized by single step, low cost hydrothermal route at low temperature by using V{sub 2}O{sub 5} and glucose as precursors. We have not added any extra organic solvents or surfactants which are commonly used for the preparation of different nanostructures of V{sub 2}O{sub 5}. Electron microscopy analyses demonstrate that C-dot is entrapped inside V{sub 2}O{sub 5} nanobelts which in turn enhance the conductivity and ion propagation property of this composite material. The C-dot@V{sub 2}O{sub 5} nanobelts exhibit an excellent three electrode electrochemical performance in 1 M Na{sub 2}SO{sub 4} and which showed a specific capacitance of 270 F g{sup −1} at 1 A g{sup −1}, which is ~ 4.5 times higher than the pristine V{sub 2}O{sub 5} electrode. The electrochemical energy storage capacity of this hybrid is investigated towards solid state supercapacitor application also for the first time by employing electrophoretically deposited C-dot as the counter electrode and Li based gel as the electrolyte. The hybrid material delivers an energy density of 60 W h kg{sup −1} and a reasonably high power density of 4.1 kW kg{sup −1} at 5 A g{sup −1} and good cycling stability and capacitance retention of about 87% was observed even after 5000 cycles. Above mentioned results clearly show that C-dot embedded hybrid, nanostructured transition metal oxides has great potential towards fabrication of electrodes for energy storage devices. - Highlights: • Synthesis of C-dot decorated V{sub 2}O{sub 5} by single step hydrothermal reduction method. • A specific capacitance of 270 F g{sup −1} at a current density of 1 A g{sup −1} for three electrode system. • Fabrication of solid state device by using gel electrolyte. • An energy density of 60 W h kg{sup −1} at 1 A g{sup −1} high power density of 4.1 kW kg{sup −1} at 5 A g{sup −1} for C-dot@V{sub 2}O{sub 5}.

• OSTI ID: 22742029
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Vol. 253; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
CAPACITANCE
CAPACITIVE ENERGY STORAGE EQUIPMENT
CAPACITORS
CARBON
COMPOSITE MATERIALS
CURRENT DENSITY
ELECTROCHEMISTRY
ELECTRODES
ELECTROLYTES
ENERGY DENSITY
GELS
HYDROTHERMAL SYNTHESIS
ORGANIC SOLVENTS
POWER DENSITY
QUANTUM DOTS
SODIUM SULFATES
TEMPERATURE RANGE 0065-0273 K
VANADATES
VANADIUM OXIDES