Carbon Letters 2023 KCI Impact Factor : 1.35 KCI-WoS Impact Factor : 6.04
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pISSN : 1976-4251 / eISSN : 2233-4998
- https://journal.kci.go.kr/carbon
KJCKorea
Journal Central
Exploration on reduced graphene oxide/strontium pyro niobate electrode material for electrochemical energy storage applications
- Carbon Letters
- Abbr : Carbon Lett.
- 2021, 31(4), pp.619-633
- DOI : 10.1007/s42823-020-00203-4
- Publisher : Korean Carbon Society
- Research Area : Natural Science > Natural Science General > Other Natural Sciences General
- Received : July 24, 2020
- Accepted : October 29, 2020
- Published : August 1, 2021
Kumar M. Infant Shyam 1, Kirupavathy S. Shahil 2, Shalini S. 3
1Rajalakshmi Engineering College
2Velammal Engineering College
3R.M.D. Engineering College
Accredited
ABSTRACT
Most recently, graphene-related composite-modifed electrode surfaces are been widely employed to improve surface interactions and electron transfer kinetics. Hydrothermally prepared strontium pyro niobate (SPN) and reduced graphene oxide/ strontium pyro niobate (RGOSPN) nanostructures reveal excellent morphology. X-ray difraction analysis of SPN and RGOSPN agree with standard data. Thermogravimetry–diferential scanning calorimetry analyses show that RGOSPN has higher thermal stability than SPN. In addition, from the polarization–electric feld (P–E) loop measurements, the estimated value of remnant polarization (Pr ) and coercive electric feld (Ec) of SPN are 0.039 µC cm−2 and −2.90 kV cm−1 and that of RGOSPN nanocomposite are 0.0139 µC cm−2 and −2.04 kV cm−1. Cyclic voltammetry measurements show that RGOSPN nanocomposite manifests the possibility of electrochemical reversibility beyond long cycles without change in performance.
The redox cycle reveal that RGOSPN can be used as part of a composite electrode for hybrid capacitors dynamic conditions.
Moreover, the specifc capacitance of SPN and RGOSPN was calculated using galvanostatic charge–discharge (GCD) technique. The observed energy density of 9.1 W h kg−1 in RGOSPN is higher when compared with previous reported values.
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