Journal ArticleDOI
Facile synthesis of a MnFe2O4/rGO nanocomposite for an ultra-stable symmetric supercapacitor
Amin Goljanian Tabrizi,Nasser Arsalani,Abdolkhaled Mohammadi,Hassan Namazi,Laleh Saleh Ghadimi,Iraj Ahadzadeh +5 more
TLDR
In this article, a binary MnFe2O4/reduced graphene oxide (MnFe2OC4/rGO) nanocomposite is successfully synthesized using a facile approach.Abstract:
In this paper, a binary MnFe2O4/reduced graphene oxide (MnFe2O4/rGO) nanocomposite is successfully synthesized using a facile approach. To possess larger layer spacing, worm-like expanded graphite (EG) is used instead of graphite for the synthesis of pristine graphene oxide (GO) suspension using the modified Hummer's method. Furthermore, the obtained GO suspension concentrated by Mn2+ ions is utilized to synthesize the MnFe2O4/rGO nanocomposite by precipitation of Mn2+ ions and in situ reduction of GO, simultaneously. The formation of the MnFe2O4/rGO nanocomposite and its individual constituents is confirmed using XRD, FT-IR, Raman, FE-SEM, TEM, BET, and TGA. Moreover, the magnetic properties of the samples are studied using a vibrating sample magnetometer. A hybrid supercapacitor is fabricated using a two-electrode system with a synthesized nanocomposite that demonstrates the specific capacitance of 271 F g−1 at the current density of 0.5 A g−1 in 6 M aqueous KOH electrolyte. It is worth noting that the cycling durability of the symmetric supercapacitor is excellent, in which 104% of primary capacitance is preserved after about 5000 periods. Thus, the obtained extraordinary electrochemical proficiency of the binary composite is a result of the specific construction and the qualified electrical conductivity of the rGO nanosheets.read more
Citations
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Advanced materials and technologies for supercapacitors used in energy conversion and storage: a review
M. I. A. Abdel Maksoud,Ramy Amer Fahim,Ahmed Esmail Shalan,Ahmed Esmail Shalan,M. Abd Elkodous,M. Abd Elkodous,S. O. Olojede,Ahmed I. Osman,Charlie Farrell,Charlie Farrell,Ala’a H. Al-Muhtaseb,A. S. Awed,A. H. Ashour,David W. Rooney +13 more
TL;DR: In this article, the authors compared the performance of spinel ferrites, perovskite oxides, transition metals sulfides, carbon materials, and conducting polymers for supercapacitors.
Journal ArticleDOI
Engineering rGO-CNT wrapped Co3S4 nanocomposites for high-performance asymmetric supercapacitors
Abdolkhaled Mohammadi,Nasser Arsalani,Amin Goljanian Tabrizi,Seyyed Ebrahim Moosavifard,Zhwan Naqshbandi,Laleh Saleh Ghadimi +5 more
TL;DR: In this paper, a novel nanocomposites based on the cobalt sulfide (Co 3 S 4 ) particles warped in carbon nanotubes (CNTs)/reduced graphene oxide (rGO) nanosheets via a low cost, facile, and one-pot hydrothermal method as an efficient electrode for high-performance supercapacitors.
Journal ArticleDOI
Ultrastable Triazine-Based Covalent Organic Framework with an Interlayer Hydrogen Bonding for Supercapacitor Applications.
TL;DR: This study provided a new strategy for designing redox-active COFs for pseudocapacitive storage and exhibited an excellent electrochemical performance with the highest specific capacitance and could retain 88% of the initial capacitance after 20000 charge-discharge cycles, which was better than most of the analogous materials reported previously.
Journal ArticleDOI
MnFe2O4 decorated reduced graphene oxide heterostructures: Nanophotocatalyst for methylene blue dye degradation
TL;DR: In this paper, the photocatalytic degradation of methylene blue dye (MB) has been investigated using bare manganese ferrite (MnFe2O4) nanoparticles and MnFe 2O4 nanoparticles-decorated reduced graphene oxide heterostructures under ultra-violet irradiation.
References
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Expanded graphite as superior anode for sodium-ion batteries
Yang Wen,Kai He,Yujie Zhu,Fudong Han,Yunhua Xu,Isamu Matsuda,Yoshitaka Ishii,John Cumings,Chunsheng Wang +8 more
TL;DR: Expanded graphite is reported as a Na-ion battery anode, prepared through a process of oxidation and partial reduction on graphite, which has an enlarged interlayer lattice distance yet retains an analogous long-range-ordered layered structure to graphite.
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The chemical and structural analysis of graphene oxide with different degrees of oxidation
TL;DR: In this article, the formation of different types of oxygen containing functional groups in GO and their influences on its structure were analyzed using X-ray diffraction (XRD), Fourier transform infra-red spectra, x-ray photoelectron spectra (XPS), zeta potential analysis and Raman spectroscopy.
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Freestanding three-dimensional graphene/MnO2 composite networks as ultralight and flexible supercapacitor electrodes.
TL;DR: This research might provide a method for flexible, lightweight, high-performance, low-cost, and environmentally friendly materials used in energy conversion and storage systems for the effective use of renewable energy.
Journal ArticleDOI
Large reversible capacity of high quality graphene sheets as an anode material for lithium-ion batteries
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A review of graphene and graphene oxide sponge: material synthesis and applications to energy and the environment
TL;DR: A comprehensive review about the most recent progress in synthesis, characterization, fundamental understanding, and performance of graphene and graphene oxide sponges can be found in this paper, where the technical challenges are discussed, and several future research directions are also suggested.