Iron-carbon nanohybrid particles as environmentally benign electrode for supercapacitor
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In this work, we report the synthesis and electrode applications of iron-carbon nanohybrid particles prepared by carbonization of a nanocomposite of FeOOH nanoneedles and melamine-formaldehyde resin. The chemical composition and microstructure of the material have been characterized using ICP-AES, FT-IR, XRD, FESEM, TEM and XPS. The supercapacitor properties of the MF-Fe-C are studied in detail. A thorough comparison of the supercapacitor performances of MF-Fe-C and bare MF-C has been carried out through detailed electrochemical characterisations employing both two and three-electrode techniques. The nanohybrid showed an enhanced energy density of 127.75 WhKg−1, specific capacitance of ∼408 F g−1 at 1 mVs−1 scan rate, and excellent cyclic stability even after 1000 charge-discharge cycles, making it an intriguing material for high energy density supercapacitor devices.
KeywordsElectrochemistry Nanohybrid Supercapacitor Energy density
DJ acknowledges the financial support from the Science and Engineering Research Board (RJN-112/2012) and Board of Research in Nuclear Sciences (37(2)/14/21/2015/BRNS). DV acknowledges the DST Inspire Doctoral Fellowship (IF150027). CSR would like to thank DST (Government of India) for the Ramanujan fellowship (Grant No. SR/S2/RJN-21/2012). This work was supported by the DST-SERB Fast-Track Young Scientist (Grant No. SB/FTP/PS-065/2013), UGC-UKIERI Thematic Awards (Grant No. UGC-2013-14/005), and BRNS-DAE (Grant No. 37(3)/14/48/2014-BRNS/1502). Also, part of this work is supported by the Indo-US Science and Technology Forum (IUSSTF) through a joint INDO-US centre grant and Ministry of Human Resources Development (MHRD), India, through a center of excellence grant. The authors acknowledge the electron microscopy facility at Centre for Materials Characterization in CSIR – National Chemical Laboratory.
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