ARANGANATHAN VISWANATHAN
Articles written in Bulletin of Materials Science
Volume 44 All articles Published: 10 June 2021 Article ID 0179
Quick responsive and durable supercapacitive performance of rGO/Zn(OH)$_2$/PANI nanocomposites
ARANGANATHAN VISWANATHAN ADKA NITYANANDA SHETTY S P BHARATH K MAHENDRA
The quick responsive and durable supercapacitive performance was achieved from reduced graphene oxide/
zinc hydroxide/polyaniline (rGO5.88%/Zn(OH)$_2$11.77%/PANI82.35%) (GZnP82) nanocomposite, synthesized by
Volume 45 All articles Published: 24 March 2022 Article ID 0060
ARANGANATHAN VISWANATHAN ADKA NITYANANDA SHETTY
The influences of base and salt forms, dopants used for protonation and different oxidation states of polyaniline (PANI) on its crystal structure, morphology, electrochemical stability, electrical conductivity and different potential-dependent energy storage by electrochemical processes were investigated by synthesizing PANI with two different acid dopants and in two different redox forms. The results reveal that, the methane sulphonic acid (MSA) causes more storage of energy in PANI. The reduced form of PANI furnishes high surface area and stores more energy than the respective oxidized form. The MSA-doped PANI exhibits an inimitable property of increase of specific capacitance ($C_s$) with increase in number of charge/discharge cycles in both oxidized and reduced forms. The structural changes of PANI after 25600 cycles were determined by IR spectroscopy, which confirmed that the irreversible formation of pernigraniline causes property degradation of PANI. The maximum energy storage parameters obtained from oxidized form of PANI doped with MSA (PANIMSA-Ox) are a $C_s$ of 458 F g$^{-1}$, a specific energy ($E_s$) of 91 W h kg$^{-1}$ and a specific power ($P_s$) of 2.0983 kW kg$^{-1}$ at 1 A g$^{-1}$. In addition, the PANIMSA-Ox exhibits an exceptional cyclic stability up to 25600 at 0.4 V s$^{-1}$. The theoretical capacitance of PANI (2000 F g$^{-1}$) is nearly reached with PANIMSA-Ox as it provided the $C_s$ of an electrode of 1834.84 F g$^{-1}$ at 1 A g$^{-1}$. Most significantly, the PANIMSA-Ox presents the maximum of four faradaic couples and exceptional energy storage without using any redox supporting electrolytes.
Volume 46, 2023
All articles
Continuous Article Publishing mode
Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020
Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
Physical Sciences 2020
Click here for Editorial Note on CAP Mode
© 2022-2023 Indian Academy of Sciences, Bengaluru.