Synthesis and characterization of CuS, CuS/graphene oxide nanocomposite for supercapacitor applications
TL;DR: In this paper, the authors have synthesized CuS nanoparticles and graphene oxide (CuS-GO) nanocomposites for supercapacitor applications because of their low cost and excellent electrochemical properties.
Abstract: Supercapacitors or electrochemical capacitors are receiving greater interest because of their high-power density, long life, and low maintenance. We have synthesized CuS nanoparticles and graphene oxide (CuS–GO) nanocomposites for supercapacitor applications because of their low cost and excellent electrochemical properties. The phase purity of each material was determined using powder XRD studies. The bandgap was determined by UV-visible spectrophotometric studies. Scanning electron microscope and transmission electron microscope images revealed the nano-scale morphology of the synthesized particles. All the electrochemical measurements were conducted in a standard three-electrode configuration, using a platinum wire as the counter electrode and Hg/HgO as the reference electrode. CuS and its composites with graphene oxide on nickel foam were used as working electrodes. All the electrochemical measurements were performed in 3M KOH solution. The CuS–GO nanocomposite electrode showed a specific capacitance of 250 F/g, 225 F/g, 182 F/g, 166 F/g, 161 F/g, and 158 F/g at a current density of 0.5 A/g, 1 A/g, 5 A/g, 10 A/g, 15 A/g, and 20 A/g, respectively. CuS–GO electrodes showed a specific capacitance retention of 70% after 5000 charge–discharge cycles at a current density of 5 A/g.
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TL;DR: A comprehensive review of the recent development in carbon material with reliance on carbon-based copper sulfide nanocomposites and their high energy supercapacitor applications is presented in this article .
Abstract: The present paper reports comprehensive reviews of the recent development in carbon material with reliance on carbon-based copper sulfide nanocomposites and their high energy supercapacitor applications. Due to their exceptional features, among various transition metal sulfides, copper sulfides (CuxS, x = 1–2) have sparked a lot of interest in energy storage systems and have long been acknowledged as major industrial materials with a variety of purposes in sectors as diverse as electronics, photovoltaics, catalysis, sensors, and energy storage. Owing to its promising electrochemical performance, simplicity of accessibility, high electrical conductivity, low electronegativity, distinctive crystal shapes, high specific capacity, strong redox activity, and cheap manufacturing costs have sparked intense interest in the development of growing supercapacitors to fulfill the skyrocketing demand for efficient electrochemical energy storage devices. As a supercapacitor electrode material, several composites of copper sulfide with varied carbon-based systems such as carbon nanotubes, graphene, and activated carbon have been briefly mentioned here. Furthermore, this study describes the existing problems as well as some potential approaches that may encourage the superior strategic design of smarter carbon-based copper sulfide nanomaterials for the next-generation high energy supercapacitors applications. The current problems and potential advancements in this area for establishing energy storage devices that are efficient are also reviewed.
18 citations
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TL;DR: In this paper , the effects of CuS concentration on the structural, morphological and electrochemical properties of TiO 2 /CuS nanocomposites for hybrid asymmetric Faradaic supercapacitors was studied for the first time.
Abstract: In this research work, we have prepared nanocomposites of copper sulfide (CuS) nanoparticles (NPs) with titanium dioxide (TiO 2 ) nanoflakes, with varying contents of CuS, via combined chemical precipitation and sol-gel methods. The effects of CuS concentration on the structural, morphological and electrochemical properties of TiO 2 /CuS nanocomposites for hybrid asymmetric Faradaic supercapacitors was studied for the first time. Electrochemical studies were carried out by using CV, CD, and EIS measurements in a three/two-electrode setups for both capacitive and practical aspects. When serving as an electrode material for the supercapacitors in three-electrode measurements, all the samples demonstrated a capacitive nature with a Faradaic charge storage mechanism due to the prominent redox peaks originating from their CV and voltage plateau in the CD profile. The optimized electrode ST-3 revealed the highest energy storage performance (capacitance: 853 F g −1 ) with low charge transfer and solution resistance compared with other electrodes (CuS: 440 F g −1 , TiO 2 : 326 F g −1 , ST-1: 535 F g −1 , ST-5: 672 F g −1 ) at 1 Ag −1 with the superior rate capability. The ST-3//AC//KOH ASC displayed a high capacitance of 226.5 F g −1 and 80.2 F g −1 at the discharge current was prolonged from 1 to 5 A g −1 after an optimized voltage of 1.8 V in a two-electrode setup. Interestingly, an outstanding energy density of 68.4 W h kg −1 was achieved at a high-power density of 8150 W kg −1 at a discharge current of 1 and 5 A g −1 , with the descent durability of 87 % at a high discharge current of 6 A g −1 when recycled for a large number of 25,000 cycles. These outstanding features highlight an appealing, low-cost, simple, and green route to synthesize other transition metal sulfides for the next-generation electronic devices. Some of the main features of this article are as follows: • TiO 2 /CuS//AC ASC is fabricated for the first time. • TiO 2 -30% CuS electrode had a greater specific capacitance of 853 F g -1 , than pure CuS (440 F g -1 ) • TiO 2 -30% CuS//AC ASC delivered an outstanding energy density of 68.4 W h kg -1 at a high-power density of 8150 W kg -1 • TiO 2 /CuS excellent stability of 87% retention after 25,000 cycles.
16 citations
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TL;DR: In this article, the preparation of the CuS/RGO nanocomposite via the hydrothermal method using GO and Cu-DTO complex as precursors X-ray diffraction, Fourier transform infrared spectroscopy, and Raman and Xray photoelectron spectroscopic study revealed the formation of the RGO nan composites with improved crystallinity, defective nanostructure, and the presence of the residual functional group in the RDO sheet.
Abstract: This study is focused on the preparation of the CuS/RGO nanocomposite via the hydrothermal method using GO and Cu-DTO complex as precursors X-ray diffraction, Fourier-transform infrared spectroscopy, and Raman and X-ray photoelectron spectroscopy study revealed the formation of the CuS/RGO nanocomposite with improved crystallinity, defective nanostructure, and the presence of the residual functional group in the RGO sheet The morphological study displayed the transformation of CuS from nanowire to quantum dots with the incorporation of RGO The galvanostatic charge/discharge curve showed that the CuS/RGO nanocomposite (12 wt % Cu-DTO complex) has tremendous and outperforming specific capacitance of 3058 F g-1 at 1 A g-1 current density with moderate cycling stability (∼603% after 1000 cycles at 10 A g-1) The as-prepared nanocomposite revealed excellent improvement in specific capacitance, cycling stability, Warburg impedance, and interfacial charge transfer resistance compared to neat CuS The fabricated nanocomposites were also investigated for their bulk DC electrical conductivity and EMI shielding ability It was observed that the CuS/RGO nanocomposite (9 wt % Cu-DTO) exhibited a total electromagnetic shielding efficiency of 64 dB at 23 GHz following absorption as a dominant shielding mechanism Such a performance is ascribed to the presence of interconnected networks and synergistic effects
6 citations
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TL;DR: In this paper , a polyaniline-based nanocomposite was synthesized by in situ polymerization of aniline monomer, which reveals the interaction between the nanofillers.
Abstract: This study aims to design a new nanocomposite as a supporting material for wiring the enzyme to develop a bioanode in the enzymatic biofuel cell (EBFC). In this work, polyaniline-based nanocomposite was synthesized by in situ polymerization of aniline monomer. The zeta potential study of the nanofillers was carried out, which reveals the interaction between the nanofillers. The synthesized nanocomposite (MWCNT/ZnS/AgNWs/PANI) was characterized by analytical techniques, such as Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction spectroscopy (XRD). Furthermore, the surface morphology and the in-depth information of the synthesized nanocomposite were displayed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), respectively. In addition, the as-synthesized nanocomposite and the designed bioanode underwent the electrochemical assessment using different electrochemical techniques such as cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and linear sweep voltammetry (LSV) for evaluating the electrochemical behavior of the fabricated anodes. The electrochemically regulated bioanode (MWCNT/ZnS/AgNWs/PANI/Frt/GOx) obtained an open-circuit voltage of 0.55 V and produced a maximal current density of 7.6 mA cm−2 at a glucose concentration of 50 mM prepared in phosphate buffer solution (PBS) (pH 7.0) as a supporting electrolyte at a scan rate of 100 mV s−1.
6 citations
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TL;DR: In this article , a two electrode asymmetric supercapacitor (ASC) was constructed and it exhibits the Csp of 54 Fg −1 at 3 Ag −1 , and even after 5000 cycles at a 7 Ag − 1 of current density, the ASC device was able to retain internal capacitance retention of 91.2 % due to its high energy density of 21.68 Wh kg − 1 and power density of 1272.92 W kg −1 .
Abstract: Copper sulfide (CuS) based material has been broadly used in recent years because of its semiconducting and non-toxic nature. CuS nanocubes (NCs) were synthesized at low temperature by the solvothermal method using copper diethyldithiocarbamate (Cu[DTC] 2 ) as a single-source precursor and the presence of hexadecylamine (HDA) as shape directing agent. As-prepared CuS NCs properties like thermal, phase, vibrational group, morphology and elemental were explored by different analytic tools. Further, the electrochemical behaviours of CuS NCs modified working electrode were examined in 1 M KOH electrolyte solution. It exhibits remarkable specific capacitance (Csp) of 1472.3 Fg −1 at 1 Ag −1 with excellent capacitive retention up to 93.6 % after 5000 charge-discharge cycles at the current density of 10 Ag −1 . Besides, the two electrode asymmetric supercapacitor (ASC) device was constructed and it exhibits the Csp of 54 Fg −1 at 3 Ag −1 . Moreover, even after 5000 cycles at a 7 Ag −1 of current density, the ASC device was able to retain internal capacitance retention of 91.2 % due to its high energy density of 21.68 Wh kg −1 and power density of 1272.92 W kg −1 . After 5000 cycle's electrochemical evaluation of CuS NCs modified electrode were analyzed. These outcomes of electrochemical performance suggested that fabricated CuS||AC device has a bright future in energy storage application. • CuS nanocubes have been successfully synthesized by solvothermal method using single source precursor. • CuS electrode exhibits Faradic pseudocapacitive behaviour and achieved excellent specific capacitance of 1472.3 Fg -1 at 1 Ag -1 • Retention; 93.6% and 98.3% coulombic efficiency after 5000 cycles. • Fabricated CuS||AC device exhibits high energy density of 21.5 Wh kg -1 and power density of 1274.8 W kg -1 . • After electrochemical performance electrode was tested PXRD, FT-IR, SEM and EDS.
5 citations
References
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TL;DR: This method provides a facile and straightforward approach to deposit MnO(2) nanoparticles onto the graphene oxide sheets (single layer of graphite oxide) and may be readily extended to the preparation of other classes of hybrids based on GO sheets for technological applications.
Abstract: A composite of graphene oxide supported by needle-like MnO2 nanocrystals (GO−MnO2 nanocomposites) has been fabricated through a simple soft chemical route in a water−isopropyl alcohol system. The formation mechanism of these intriguing nanocomposites investigated by transmission electron microscopy and Raman and ultraviolet−visible absorption spectroscopy is proposed as intercalation and adsorption of manganese ions onto the GO sheets, followed by the nucleation and growth of the crystal species in a double solvent system via dissolution−crystallization and oriented attachment mechanisms, which in turn results in the exfoliation of GO sheets. Interestingly, it was found that the electrochemical performance of as-prepared nanocomposites could be enhanced by the chemical interaction between GO and MnO2. This method provides a facile and straightforward approach to deposit MnO2 nanoparticles onto the graphene oxide sheets (single layer of graphite oxide) and may be readily extended to the preparation of othe...
1,953 citations
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TL;DR: In this paper, a symmetric RuO2/RuO2 supercapacitor with a high operating voltage of 1.6 V is built using the nanocrystalline hydrous RuO 2.
Abstract: A novel symmetric RuO2/RuO2 supercapacitor with a high operating voltage of 1.6 V is built using the nanocrystalline hydrous RuO2. The symmetric supercapacitor exhibits an energy density of 18.77 Wh kg −1 at a power density of 500 W kg −1 based on the total mass of active electrode material and excellent cycling stability and power capability. These results demonstrate the potentialities of using RuO2 for symmetric supercapacitor or using RuO2 as negative electrode for asymmetric supercapacitor with high energy density.
271 citations
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TL;DR: In this article, the authors demonstrate the electrodeposition of Ni 3 S 2 on ZnO (ZnO@Ni 3S 2 ) array supported on nickel foam.
Abstract: In this communication, for the first time, we demonstrate the electrodeposition of Ni 3 S 2 on ZnO (ZnO@Ni 3 S 2 ) array supported on nickel foam We further demonstrate the direct use of ZnO@Ni 3 S 2 array as a binder-free electrode material for supercapacitors and this electrode exhibits a very high specific capacitance of 1529 F g −1 at a current density of 2 A g −1 , good rate capability and cycling stability
204 citations
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TL;DR: In this paper, the effect of heat treatment on electrochemical properties of copper sulfide (CuS) electrodes were examined by cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge/discharge tests.
Abstract: Copper sulfide (CuS) nanoplatelets have been fabricated by simple low temperature chemical bath deposition technique for electrochemical supercapacitor electrodes. The morphology and structural properties of the electrodes were analyzed using scanning electron microscopy and X-ray diffraction. The effect of heat treatment on electrochemical properties of CuS electrodes were examined by cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge/discharge tests. Results show that bare and heat treated CuS has pseudocapacitive characteristic within the potential range of −0.6 to 0.3 V (vs. Ag/AgCl) in aqueous 1 M LiClO 4 solution. The pseudocapacitance is induced mainly by lithium ions insertion/extraction with the CuS electrodes. The specific capacitance of 72.85 F g −1 was delivered by heat treated CuS film at a scan rate of 5 mV s −1 with an energy and power density of 6.23 W h kg −1 and 1.75 kW kg −1 at 3 Ag −1 constant discharge current which is comparatively higher than that of as deposited CuS electrode.
148 citations
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TL;DR: In this article, the facile one-step hydrothermal preparation of a NiSe nanowire film on nickel foam (NiSe/NF) as a novel binder-free electrode material for supercapacitors was reported.
Abstract: We report on the facile one-step hydrothermal preparation of a NiSe nanowire film on nickel foam (NiSe/NF) as a novel binder-free electrode material for supercapacitors. This electrode delivers a high specific capacitance of 1790 F g−1 and an areal capacitance of 5.01 F cm−2 at a current density of 5 A g−1.
132 citations