Solvothermal synthesis and electrochemical properties of phase pure pyrite FeS^sub 2^ for supercapacitor applications

Pyrite FeS2 was synthesized through a simple, cost effective solvothermal method. NaOH was used in the synthesis, which plays a crucial role as a pH regulator. The formation of pyrite FeS2 was confirmed through XRD, Raman Spectroscopy and FTIR. SEM results showed the formation of octahedral shaped p...

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Bibliographic Details
Published in:Electrochimica acta 2018-11, Vol.290, p.378
Main Authors: Venkateshalu, Sandhya, Kumar, P Goban, Kollu, Pratap, Jeong, Soon Kwan, Grace, Andrews Nirmala
Format: Article
Language:English
Subjects:
Aqueous electrolytes
Capacitance
Chemical synthesis
Electrochemical analysis
Electrode materials
Electrodes
Electrolytes
Flux density
Fourier transforms
Pyrite
Raman spectroscopy
Sodium hydroxide
Sodium sulfate
Supercapacitors
Thermogravimetric analysis
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Summary:Pyrite FeS2 was synthesized through a simple, cost effective solvothermal method. NaOH was used in the synthesis, which plays a crucial role as a pH regulator. The formation of pyrite FeS2 was confirmed through XRD, Raman Spectroscopy and FTIR. SEM results showed the formation of octahedral shaped particles with slight truncated edges. Thermogravimetric Analysis was performed to determine the properties of the material. The electrochemical studies were performed with a three electrode system to explore its supercapacitive behavior using 1 M Na2SO4 and 3.5 M KOH aqueous electrolytes. The electrochemical tests indicated that pyrite FeS2 exhibits a specific capacitance of 260 F/g at 1 A/g with an energy density of 46.8 Wh/kg. The good capacitance and high energy density makes it suitable to be used as an efficient electrode material for supercapacitors.
ISSN:0013-4686
1873-3859