title: Polyaniline-Stabilized Intertwined Network-like Ferrocene/Graphene Nanoarchitecture for Supercapacitor Application.
abstract: The present work highlights the effective H-π interaction between metallocenes (ferrocene; Fc) and graphene and their stabilization in the presence of polyaniline (PANI) through π-π interactions. The PANI-stabilized Fc@graphene nanocomposite (FcGA) resembled an intertwined network-like morphology with high surface area and porosity, which could make it a potential candidate for energy-storage applications. The relative interactions between the components were assessed through theoretical (DFT) calculations. The specific capacitance calculated from galvanostatic charging/discharging indicated that the PANI-stabilized ternary nanocomposite exhibited a maximum specific capacitance of 960 F g-at an energy density of 85 Wh Kg-1and a current density of 1 A g-. Furthermore, electrochemical impedance spectroscopy (EIS) analysis confirmed the low internal resistance of the as-prepared nanocomposites, which showed improved charge-transfer properties of graphene after incorporation of Fc and stabilization with PANI. Additionally, all electrodes were found to be stable up to 5000 cycles with a specific capacitance retention of 86 %, thus demonstrating the good reversibility and durability of the electrode material.
authors.affiliation: Department of Applied Chemistry, IIT(ISM) Dhanbad, 826004, Jharkhand, India.
authors.forename: Amrita De
authors.initials: A
authors.lastname: Adhikari
authors.affiliation: Department of Applied Chemistry, IIT(ISM) Dhanbad, 826004, Jharkhand, India.
authors.forename: Ramesh
authors.initials: R
authors.lastname: Oraon
authors.affiliation: Department of Applied Chemistry, IIT(ISM) Dhanbad, 826004, Jharkhand, India.
authors.forename: Santosh Kumar
authors.initials: SK
authors.lastname: Tiwari
authors.affiliation: Condensed Matter Theory, Materials Theory Division, Department of Physics and Astronomy, Uppsala University, Box 516, 751 20, Uppsala, Sweden.
authors.forename: Naresh K
authors.initials: NK
authors.lastname: Jena
authors.affiliation: Department of BIN Fusion Technology, Chonbuk National University, Jeonju, Jeonbuk, 571-756, Republic of Korea.|Department of Polymer & Nano Science and Technology, Chonbuk National University, Jeonju, Jeonbuk, 571-756, Republic of Korea.
authors.forename: Joong Hee
authors.initials: JH
authors.lastname: Lee
authors.affiliation: Department of BIN Fusion Technology, Chonbuk National University, Jeonju, Jeonbuk, 571-756, Republic of Korea.|Department of Polymer & Nano Science and Technology, Chonbuk National University, Jeonju, Jeonbuk, 571-756, Republic of Korea.
authors.forename: Nam Hoon
authors.initials: NH
authors.lastname: Kim
authors.affiliation: Department of Applied Chemistry, IIT(ISM) Dhanbad, 826004, Jharkhand, India.
authors.forename: Ganesh Chandra
authors.initials: GC
authors.lastname: Nayak
keywords: electrochemistry; metallocenes; nanostructures; pi interactions; supercapacitors