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Abstract
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The continuous evolution toward high-yield electronic devices with green and mechanical robust properties oers an emerging demand or polymeric nanocomposite electrodes. Herein, an ecient in-situ electrosynthesized route was pursued in designing novel reduced graphene oxide/polyindole (rGO/PIND) nanocomposite electrodes decorated by γ-MnO2 and V2O5 nanostructures. A nanosecond ber laser was applied to synthesize V2O5 nanoparticles through laser ablation in liquid (LAL) technique and γ-MnO2 nanostructure was constructed by a solid-state reaction method. The abricated electrodes were characterized by physical and electrochemical methods. To investigate the eect o the surace morphological eatures on the electrochemical (EC) perormance o nanocomposite electrodes the surace statistical, Areal Autocorrelation Function (AACF), and ractal studies were carried out by using AFM analysis. These studies revealed the presence o nanoparticles results in more compactness and well-developed surace morphology with more roughness and irregularity. The electrochemical study o the design electrodes was perormed in three and two-electrode setups. Two asymmetric supercapacitors (ASCs) o rGO//rGO/PIND/V2O5, rGO//rGO/PIND/γ-MnO2 were abricated and characterized by physical and electrochemical methods. The rGO//rGO/PIND/γ-MnO2 ASSC device provided a superior speci c capacitance (CS) o 165F g1, energy density o 51.5 Wh kg1, and power density o 3.7 kW kg1 at 5.0 A g1 with 95.7% retention o CS ater 10,000 cycles and with a broad 1.50 V potential window. Additionally, the rGO/ PIND/γ-MnO2//rGO/PIND/γ-MnO2 symmetric supercapacitor (SSC) device exhibited 28.5 Wh kg1 energy density, and 6.8 kW kg1 power density at 5.0 A g1 with 92.8% retention capacitance ater 10,000 cycles
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