Vijayasankar, K. and Senthil, S.T. and Berchmans, L.J. and Sanjeeviraja, C. and Kalaiselvan, R. (2012) Effect of reaction time on the synthesis and electrochemical properties of Mn3O4 nanoparticles by microwave assisted reflux method. Applied Surface Science, 259. pp. 624-630. ISSN 0169-4332

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Spherical Mn3O4 nanoparticles were synthesized by microwave assisted reflux method at different reaction times (1, 5, 10, 15, and 20 min). The single phase formation of Mn3O4 nanoparticles was identified through XRD analysis. The FT-IR and Raman spectra revealed the presence of functional groups of Mn3O4 and further support the XRD results. The spherical morphology of Mn3O4 was identified via SEM analysis. The cyclic voltammetry analysis implies that 15 min synthesized Mn3O4 (MN-15) shows the higher specific capacitance of 135 F g−1 among all the prepared Mn3O4 electrodes. The EIS spectra of MN-15 substantiate the less charge-transfer resistance (Rct) of 0.553 �, when compared with the other samples. The discharge capacitance of MN-15 was 103 F g−1 at 0.5 mA cm−2 in 1 M NaNO3 solution. The cycling stability curve over 100 cycles implies that the discharge capacitance is increased from 47 to 68 F g−1 at 5 mA cm−2. This capacitance enhancement during cycling is due to the influence of phase or morphological variation of Mn3O4 electrodes

Item Type: Article
Uncontrolled Keywords: Microwave assisted reflux synthesis; Reaction time; Dislocation density; Active site; Energy density; Supercapacitor
Subjects: Nanotechnology
Electrochemical Materials Science
Depositing User: Dr. N Meyyappan
Date Deposited: 29 May 2013 06:25
Last Modified: 29 May 2013 06:25

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