CeO 2 -PANI-HCl and CeO 2 -PANI-PTSA composites: synthesis, characterization, and utilization as supercapacitor electrod
- PDF / 1,500,629 Bytes
- 10 Pages / 595.276 x 790.866 pts Page_size
- 63 Downloads / 183 Views
ORIGINAL PAPER
CeO2-PANI-HCl and CeO2-PANI-PTSA composites: synthesis, characterization, and utilization as supercapacitor electrode materials Rajashree Bortamuly 1 & Gayatri Konwar 2 & Purna K. Boruah 3,4 & Manash R. Das 3,4 & Debajyoti Mahanta 2 & Pranjal Saikia 1 Received: 22 May 2020 / Revised: 29 June 2020 / Accepted: 5 July 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The excellent cyclic efficiency, superior reversible charge/discharge rate, and high specific power density have made supercapacitors an important class of energy storage systems in recent time. In this study, two nano-ceria-based composites were developed to use as electrode materials in supercapacitor applications. The composites were synthesized by combining ceria with conductive polyaniline (PANI) and doped with HCl and p-toluene sulfonic acid (PTSA). The materials were characterized by FTIR spectroscopy, SEM, XRD, and XPS techniques. Electrochemical studies were performed by cyclic voltammetry, galvanometric charge-discharge, and AC impedance spectroscopy. The CeO2-PANI doped with HCl and PTSA composites displayed ideal supercapacitor behavior showing higher capacitances up to 504 F g−1 and 454 F g−1, respectively, at current density of 1 A g−1 in comparison with pristine ceria (109 F g−1). Both the composites exhibited excellent specific energy (up to 100.8 W h kg−1) as well as outstanding specific power (up to 830 W kg−1). These findings support the possibility of these composites for practical applicability as electrode materials in energy storage devices. Keywords Ceria . Nanocomposites . Polyaniline . Specific capacitance . Supercapacitors
Introduction Depletion of fossil fuel reserves and the fast-growing population across the globe leading to energy crisis inflame the search for new sustainable energy storage mechanism having improved power and energy densities. One of such major inventions is supercapacitors which are clean energy storage * Pranjal Saikia [email protected] Debajyoti Mahanta [email protected] 1
Department of Applied Sciences (Chemical Science Division), Gauhati University, Guwahati, Assam 781014, India
2
Department of Chemistry, Gauhati University, Guwahati, Assam 781014, India
3
Advanced Materials Group, Materials Sciences and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, India
4
Academy of Scientific and Innovative Research, CSIR – NEIST Campus, Jorhat, India
devices having aspects for multiple applications. Supercapacitors exhibit long cycle life, dynamic storage capacity, high per unit mass capacitance, good power, and energy densities [1–4]. The main advantage of supercapacitor which makes it superior among the existing energy storage devices is its capacity of high rate energy liberation with long cyclic ability at comparatively lower maintenance cost. Supercapacitors are useful for such situations when emergency power supply is required for exhausted vehicular batteries. For preparing an improved supercapacitor, the
Data Loading...
