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      Nanostructured spinel manganese cobalt ferrite for high-performance supercapacitors

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          Abstract

          We report on the synthesis of manganese cobalt ferrite (MnCoFeO 4) nanoparticles via a simple one-pot co-precipitation method and their characterization through energy-dispersive spectroscopy (EDS), XRD, HR-TEM, FT-IR and N 2 adsorption/desorption techniques.

          Abstract

          We report on the synthesis of manganese cobalt ferrite (MnCoFeO 4) nanoparticles via a simple one-pot co-precipitation method and their characterization through energy-dispersive spectroscopy (EDS), X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM), Fourier transform infrared (FT-IR) spectroscopy and N 2 adsorption/desorption techniques. The MnCoFeO 4 supercapacitor showed the maximum specific capacitance of 675 F g −1 at a scan rate of 1 mV s −1. Its energy and power densities were 18.85 W h kg −1 and 337.50 W kg −1, respectively, at a current density of 1.5 A g −1. The cyclic stability was scrutinized via galvanostatic charging/discharging (GCD) and electrochemical impedance spectroscopy (EIS). The degradation of the supercapacitive performance was only 7.14% after 1000 GCD cycles, indicating an excellent long-term stability. The equivalent series resistance (ESR) remained nearly constant even after 1000 GCD cycles.

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          Most cited references48

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          Reporting physisorption data for gas/solid systems with special reference to the determination of surface area and porosity (Recommendations 1984)

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            Advanced materials for energy storage.

            Popularization of portable electronics and electric vehicles worldwide stimulates the development of energy storage devices, such as batteries and supercapacitors, toward higher power density and energy density, which significantly depends upon the advancement of new materials used in these devices. Moreover, energy storage materials play a key role in efficient, clean, and versatile use of energy, and are crucial for the exploitation of renewable energy. Therefore, energy storage materials cover a wide range of materials and have been receiving intensive attention from research and development to industrialization. In this Review, firstly a general introduction is given to several typical energy storage systems, including thermal, mechanical, electromagnetic, hydrogen, and electrochemical energy storage. Then the current status of high-performance hydrogen storage materials for on-board applications and electrochemical energy storage materials for lithium-ion batteries and supercapacitors is introduced in detail. The strategies for developing these advanced energy storage materials, including nanostructuring, nano-/microcombination, hybridization, pore-structure control, configuration design, surface modification, and composition optimization, are discussed. Finally, the future trends and prospects in the development of advanced energy storage materials are highlighted.
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              Carbons and electrolytes for advanced supercapacitors.

              Electrical energy storage (EES) is one of the most critical areas of technological research around the world. Storing and efficiently using electricity generated by intermittent sources and the transition of our transportation fleet to electric drive depend fundamentally on the development of EES systems with high energy and power densities. Supercapacitors are promising devices for highly efficient energy storage and power management, yet they still suffer from moderate energy densities compared to batteries. To establish a detailed understanding of the science and technology of carbon/carbon supercapacitors, this review discusses the basic principles of the electrical double-layer (EDL), especially regarding the correlation between ion size/ion solvation and the pore size of porous carbon electrodes. We summarize the key aspects of various carbon materials synthesized for use in supercapacitors. With the objective of improving the energy density, the last two sections are dedicated to strategies to increase the capacitance by either introducing pseudocapacitive materials or by using novel electrolytes that allow to increasing the cell voltage. In particular, advances in ionic liquids, but also in the field of organic electrolytes, are discussed and electrode mass balancing is expanded because of its importance to create higher performance asymmetric electrochemical capacitors. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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                Author and article information

                Contributors
                (View ORCID Profile)
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                Journal
                RSCACL
                RSC Advances
                RSC Adv.
                Royal Society of Chemistry (RSC)
                2046-2069
                2017
                2017
                : 7
                : 82
                : 51888-51895
                Affiliations
                [1 ]Department of Analysis and Evaluation
                [2 ]Egyptian Petroleum Research Institute
                [3 ]11727 Cairo
                [4 ]Egypt
                [5 ]Energy Materials Laboratory
                [6 ]Chemistry Department
                [7 ]Faculty of Science
                [8 ]Cairo University
                [9 ]12613 Giza
                [10 ]School of Sciences and Engineering
                [11 ]The American University in Cairo
                [12 ]11835 New Cairo
                Article
                10.1039/C7RA11020K
                aa431c0f-d82e-4fd2-abd2-8c3955c499ba
                © 2017
                History

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