An efficient electrode material for high performance solid-state hybrid supercapacitors based on a Cu/CuO/porous carbon nanofiber/TiO2 hybrid composite.
TL;DR: The developed electrode material provides new insight into ways to enhance the electrochemical properties of solid-state supercapacitors, based on the synergistic effect of porous carbon nanofibers, metal and metal oxide nanoparticles, which together open up new opportunities for energy storage and conversion applications.
Abstract: A Cu/CuO/porous carbon nanofiber/TiO2 (Cu/CuO/PCNF/TiO2) composite uniformly covered with TiO2 nanoparticles was synthesized by electrospinning and a simple hydrothermal technique. The synthesized composite exhibits a unique morphology and excellent supercapacitive performance, including both electric double layer and pseudo-capacitance behavior. Electrochemical measurements were performed by cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy. The highest specific capacitance value of 530 F g-1 at a current density of 1.5 A g-1 was obtained for the Cu/CuO/PCNF/TiO2 composite electrode in a three-electrode configuration. The solid-state hybrid supercapacitor (SSHSC) fabricated based on this composite exhibits a high specific capacitance value of 330 F g-1 at a current density of 1 A g-1 with 78.8% capacitance retention for up to 10,000 cycles. At the same time, a high energy density of 45.83 Wh kg-1 at a power density of 1.27 kW kg-1 was also realized. The developed electrode material provides new insight into ways to enhance the electrochemical properties of solid-state supercapacitors, based on the synergistic effect of porous carbon nanofibers, metal and metal oxide nanoparticles, which together open up new opportunities for energy storage and conversion applications.
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TL;DR: In this paper, the authors reviewed the latest progress in supercapacitors in key performance parameters of the specific capacitance and cyclic stability related to the electrode materials of porous carbon composited with nickel, iron, cobalt, titanium, vanadium, ruthenium, copper, zinc, manganese metals and their oxides.
Abstract: Over the past decade, as a new type of electrochemical energy storage device, supercapacitors with the advantages of high power density and long cyclic stability have received extensive academic and industrial attention. Recently, metal and metal oxide nanoparticles-composited porous carbon as the electrode materials have been developed for high-performance supercapacitors. This article reviews the latest progress in supercapacitors in key performance parameters of the specific capacitance and cyclic stability related to the electrode materials of porous carbon composited with nickel, iron, cobalt, titanium, vanadium, ruthenium, copper, zinc, manganese metals and their oxides. Finally, the prospects and challenges in the design, preparation and structure optimization of metal and metal oxide-based porous carbon electrode materials to enhance the performance of energy storage for supercapacitors are also discussed.
59 citations
TL;DR: HEO-CNTs nanocomposite based full-cell electrochemical capacitor assembled in [BMIM][TFSI] electrolyte can successfully light up a red-light emitting diode (LED), demonstrating great potential of HEO- CNTsnanocomposITE in the various energy applications.
Abstract: This report anticipates a thorough strategy for the utilization of high entropy oxide (HEO) nanoparticles (1) as a cost-effective catalyst for the growth of high yield carbon nanotubes (CNTs), resu...
58 citations
TL;DR: In this article, a review summarizes the recent advancements of various copper oxide-based nanosystems employed to design better electrode materials for advanced supercapacitors, focusing on correlating their capacitive behavior with varying morphology obtained via different synthetic procedures.
Abstract: Copper oxides (CuO and Cu2O) have been established as technologically important materials due to their unique advantages of low cost, high chemical stability and remarkable electrochemical performance, particularly, in the fields of catalysis, photovoltaics and energy storage applications. Specifically, promising capacitance availability, noticeable electrochemical response and facile fabrication of copper oxides have driven enormous attention for high energy supercapacitors to meet the high rising demands for efficient electrochemical energy storage systems. This review summarizes the recent advancements of various copper oxide based nanosystems employed to design better electrode materials for advanced supercapacitors. Special emphasis has been given on correlating their capacitive behavior with varying morphology obtained via different synthetic procedures. Electrochemical responses of varied copper oxides nanostructures have been comprehensively discussed. To overcome the issue of high rates of agglomeration, low conductivity and poor electrochemical stability of pristine copper oxides nanomaterials, they have been successfully combined with suitable pseudocapacitive materials like metal oxides, chalcogenides, etc., as well as several carbon-based systems such as conducting polymers, carbon nanotubes and functionalized graphene systems, etc. to fabricate binary/ternary/quaternary nanocomposites with superior features for advanced energy storage applications, have also been outlined. In the course, merits/ demerits of these assorted nanocomposites have been highlighted to delineate clearly the current challenges faced that may promote better strategic designing of smarter nanomaterials for high performance supercapacitor electrodes in the near future.
56 citations
TL;DR: In this paper, a novel approach to prepare nitrogen-doped carbon nanofibers for applications in electrochemistry was described, which can be used to obtain other types of nitrogen-depletioned carbon materials or nitrogendoped semiconductors.
34 citations
TL;DR: In this article, a hierarchical porous N-S co-doped 3D wrinkled graphene like nanosheets (3D H-GNS) was developed from carbonization of biomass Tender palm shoots and NaHCO3.
22 citations
References
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TL;DR: This work presents a high-capacity supercapacitor material based on the nitrogen-doped porous carbon nan ofibers synthesized by carbonization of macroscopic-scale carbonaceous nanofibers coated with polypyrrole (CNFs@polypyr role) at an appropriate temperature.
Abstract: Supercapacitors (also known as ultracapacitors) are considered to be the most promising approach to meet the pressing requirements of energy storage. Supercapacitive electrode materials, which are closely related to the high-efficiency storage of energy, have provoked more interest. Herein, we present a high-capacity supercapacitor material based on the nitrogen-doped porous carbon nanofibers synthesized by carbonization of macroscopic-scale carbonaceous nanofibers (CNFs) coated with polypyrrole (CNFs@polypyrrole) at an appropriate temperature. The composite nanofibers exhibit a reversible specific capacitance of 202.0 F g–1 at the current density of 1.0 A g–1 in 6.0 mol L–1 aqueous KOH electrolyte, meanwhile maintaining a high-class capacitance retention capability and a maximum power density of 89.57 kW kg–1. This kind of nitrogen-doped carbon nanofiber represents an alternative promising candidate for an efficient electrode material for supercapacitors.
1,522 citations
TL;DR: In this article, a review of 3D carbon-based nanostructures for advanced supercapacitor applications is presented, which includes CNTs-based networks, graphene-based architectures, hierarchical porous carbon-bimodal structures, and other even more complex 3D configurations.
Abstract: Supercapacitors have attracted intense attention due to their great potential to meet the demand of both high energy density and power density in many advanced technologies. Various carbon-based nanocomposites are currently pursued as supercapacitor electrodes because of the synergistic effect between carbon (high power density) and pseudo-capacitive nanomaterials (high energy density). This feature article aims to review most recent progress on 3D (3D) carbon based nanostructures for advanced supercapacitor applications in view of their structural intertwinement which not only create the desired hierarchical porous channels, but also possess higher electrical conductivity and better structural mechanical stability. The carbon nanostructures comprise of CNTs-based networks, graphene-based architectures, hierarchical porous carbon-based nanostructures and other even more complex carbon-based 3D configurations. Their advantages and disadvantages are compared and summarized based on the results published in the literature. In addition, we also discuss and view the ongoing trends in materials development for advanced supercapacitors.
1,346 citations
TL;DR: In this paper, a simple and fast approach for the synthesis of a graphene-TiO 2 hybrid nanostructure using a microwave-assisted technique was presented, where the microstructure, composition, and morphology were characterized by X-ray diffraction, Fourier-transform infrared spectroscopy, Raman microscopy, Xray photoelectron spectroscope, and field-emission scanning electron microscopy.
268 citations
TL;DR: In this paper, an asymmetric supercapacitor was fabricated using carbon aerogel microspheres as the negative electrode and Co 3 O 4 nanowires on nickel foam as the positive electrode separated by PVA-KOH membrane.
251 citations
TL;DR: In this article, a facile method for obtaining extremely high surface area and uniformly porous carbon nanofibers for supercapacitors was proposed, where a mixture of polyacrylonitrile and sacrificial Nafion at different compositions have been electrospun into non-woven nanofiber mats with diameters in the range of 200-400nm.
239 citations