Cellulose graphitic carbon directed iron oxide interfaced polypyrrole electrode materials for high performance supercapacitors

Ramasubba Reddy Palem, Mruthyunjayachari Chattanahalli Devendrachari, Ganesh Shimoga, Chinna Bathula, Soo Hong Lee, Nadavala Siva Kumar, Ahmed S. Al-Fatesh, Dae Young Kim, Kyojung Hwang, Dong Soo Choi, Sang Youn Kim

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The rising demand for green and clean energy urges the enlargement of economical and proficient electrode materials for supercapacitors. Herein, we designed a novel electrode material by porous cellulose graphitic carbon (CC) derived from bio-waste cornhusk via the pyrolysis route, and α-Fe2O3 decorated nanostructure with CC (CCIO) was achieved in situ pyrolysis of corn-husk and Fe(NO3)3·9H2O metal salt followed by a coating of polypyrrole (CCIOP). The CC, CCIO, and CCIOP nanocomposite electrodes were characterized by XRD, Raman, FTIR, FE-SEM/EDX, FE-TEM, XPS, and BET analysis. The CCIOP nanocomposite electrode exhibits an enhanced specific capacitance (Csp) of 290.9 F/g, which is substantial to its pristine CC (128.3 F/g), PPy (140.3 F/g), and CCIO (190.7 F/g). The Csp of CCIOP in a three-electrode system, using 1 M Na2SO4 electrolyte exhibits excellent capacity retention of 79.1 % even at a high current density of 10 A/g. The as-fabricated asymmetric supercapacitor (ASC) delivered a remarkable capacity retention of 88.7 % with a coulombic efficiency of 98.8 % even after 3000 cycles. The study shows successful utilization of cellulose from bio-waste cornhusk into a substantial template applicable in future alternative energy storage devices.

Original languageEnglish
Article number127154
JournalInternational Journal of Biological Macromolecules
Volume253
DOIs
StatePublished - 31 Dec 2023

Keywords

  • Cellulose graphitic carbon
  • Cyclic stability
  • Electrochemical properties
  • PPy
  • α-FeO

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