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      Waste Toner-Derived Carbon/Fe 3O 4 Nanocomposite for High-Performance Supercapacitor

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          Abstract

          Electronic waste management is one of the key challenges for the green revolution without affecting the environment. The wide use of printer devices has brought a horde of discarded waste toner, which release ∼6000 tons of processed carbon powder into the atmosphere every year that would essentially pollute the atmosphere. Here, we propose a one-step thermal conversion of waste toner powder into carbon/Fe 3O 4 nanocomposites for energy storage applications. Recovered toner carbon (RTC) and toner carbon calcined at 300 °C (RTC-300) were characterized using various analytical tools. From the FE-SEM analysis, the presence of carbon particles with uniformly decorated Fe 3O 4 nanoparticles was confirmed. RTC-300 carbon was used as an electrode material for supercapacitors, and it exhibited a high specific capacitance of 536 F/g at a current density of 3 A/g, which is almost six times higher than that of the commercial mesoporous graphitized carbon black. RTC-300 showed excellent electrochemical stability of 97% over 5000 cycles at a high current density of 20 A/g. The fabricated symmetric cell using RTC-300 electrode materials in an aqueous electrolyte with a cell voltage of 1.8 V delivered a high energy and high-power density of 42 W h/kg and 14.5 kW/kg, respectively. The fabricated device is stable up to 20,000 cycles at a high current density of 20 A/g with a loss of 23% capacitance.

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          “Inner” and “outer” active surface of RuO2 electrodes

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            One-step production of O-N-S co-doped three-dimensional hierarchical porous carbons for high-performance supercapacitors

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              Biomass-Derived Activated Porous Carbon from Rice Straw for a High-Energy Symmetric Supercapacitor in Aqueous and Non-aqueous Electrolytes

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                Author and article information

                Journal
                ACS Omega
                ACS Omega
                ao
                acsodf
                ACS Omega
                American Chemical Society
                2470-1343
                16 September 2019
                01 October 2019
                : 4
                : 14
                : 15798-15805
                Affiliations
                [1] Functional Materials Division and Academy of Scientific and Innovative Research (AcSIR), CSIR-Central Electrochemical Research Institute , Karaikudi 630 003, Tamil Nadu, India
                Author notes
                Article
                10.1021/acsomega.9b01337
                6776962
                31592452
                237a296f-5161-4538-9518-cfafb6954fe9
                Copyright © 2019 American Chemical Society

                This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.

                History
                : 09 May 2019
                : 23 August 2019
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                ao9b01337
                ao-2019-01337z

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