Transition metal oxide–conducting polymer nanocomposites and metal-organic framework-based composites for supercapacitor application

Mulik, Swapnajit V.; Jadhav, Sushilkumar A.; Patil, Pramod S.; Delekar, Sagar D.

doi:10.1016/b978-0-323-85705-5.00006-3

Cited by 7 publications

(5 citation statements)

References 102 publications

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“…The superior energy density observed for DMF can be attributed to the dominance of faradaic redox reaction due to the successful formation of few layers supporting the diffusion of ions and the superior power density of ethanol can be explained by the dominance of double layers charge storage mechanism due to the moderate exfoliation of MoS 2 [61], the Ragone plot for the obtained values of ED and PD is given in figure S4. However, we have demonstrated superior energy density compared to conventional capacitors and the power density was superior to that of a battery, which confirms the ability of MoS 2 to form a supercapacitor device [62].…”

Section: Galvanostatic Charge Discharge (Gcd)supporting

confidence: 60%

Solvent effects on the electrochemical performance of few layered MoS₂ electrodes fabricated using FTO substrates

Philip,

Kumar

2024

Nano Ex.

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Owing to its exceptional structural, electrical, and optical features, Molybdenum disulphide (MoS2), a two-dimensional (2D) layered material with tuneable bandgap, finds its application in electrochemical supercapacitors for superior energy and power density. Because of their low toxicity and long-term energy storage, the development of MoS2-based supercapacitors is inevitable. The study of solvent effects on the electrochemical performance of a few layered MoS2 using FTO substrates is done for the first time to the best of our knowledge. Exfoliating bulk MoS2 powder in different solvents with variable surface tensions such as Ethanol, Ethylene Glycol (EG), Dimethylformamide (DMF), and Dimethyl Sulfoxide (DMSO) results in the formation of few-layered MoS2 structures. The sample's structural, optical, and electrochemical behaviours are investigated using X-ray diffraction (XRD), atomic force microscopy (AFM), UV spectroscopy, Fourier transform infrared (FTIR), cyclic-voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS). XRD confirms the formation of a 2D MoS2 film with (002) planes and the optical investigation revealed the variation of layer dependant bandgap with solvents. We observe both faradaic and non-faradaic charge storage mechanisms in the samples and demonstrate a superior pseudocapacitive behaviour for MoS2 in DMF with a maximum specific capacitance of 34.25 F/g at a current density of 1 A/g.

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Section: Galvanostatic Charge Discharge (Gcd)supporting

confidence: 60%

Solvent effects on the electrochemical performance of few layered MoS₂ electrodes fabricated using FTO substrates

Philip,

Kumar

2024

Nano Ex.

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“…Batteries and capacitors exhibit high energy density and high power density, respectively, but a supercapacitor’s performance is in between them . Recently, researchers have focused on creating high energy density materials for electrodes, with the aim of elevating supercapacitors to battery-level energy density. , In connection with this, development of better electrode materials for supercapacitors, including transition-metal oxides (TMOs) and their composites, has attracted significant scientific attention. , TMOs are considered promising electrode materials for supercapacitors due to their remarkable properties such as high energy density (10 to 100 times that of electrolytic capacitors), excellent reversibility (surface properties), abundant redox-active reserves, and high theoretical capacitance. ,− …”

Section: Introductionmentioning

confidence: 99%

Square-Facet Nanobar MOF-Derived Co₃O₄@Co/N-doped CNT Core–Shell-based Nanocomposites as Cathode Materials for High-Performance Supercapacitor Studies

et al. 2023

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The binary as well as ternary nanocomposites of the square-facet nanobar Co-MOF-derived Co3O4@Co/N-CNTs (N-CNTs: nitrogen-doped carbon nanotubes) with Ag NPs and rGO have been synthesized via an easy wet chemical route, and their supercapacitor behavior was then studied. At a controlled pH of the precursor solution, square-facet nanobars of Co-MOF were first synthesized by the solvothermal method and then pyrolyzed under a controlled nitrogen atmosphere to get a core–shell system of Co3O4@Co/N-CNTs. In the second step, different compositions of Co3O4@Co/N-CNT core–shell structures were formed by an ex-situ method with Ag NPs and rGO moieties. Among several bare, binary, and ternary compositions tested in 6 M aqueous KOH electrolyte, a ternary nanocomposite having a 7.0:1.5:1.5 stoichiometric ratio of Co3O4@Co/N-CNT, Ag NPs, and rGO, respectively, reported the highest specific capacitance (3393.8 F g–1 at 5 mV s–1). The optimized nanocomposite showed the energy density, power density, and Coulombic efficiency of 74.1 W h.kg–1, 443.7 W.kg–1, and 101.3%, respectively, with excellent electrochemical stability. After testing an asymmetrical supercapacitor with a Co3O4@Co/N-CNT/Ag NPs/rGO/nickel foam cathode and an activated carbon/nickel foam anode, it showed 4.9 W h.kg–1 of energy density and 5000.0 W.kg–1 of power density.

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“…The superior energy density of sample C can be attributed to its dominant faradaic behaviour as observed in the diffusion contribution using Dunn's method. We have shown that the energy density of MnO 2 may construct a supercapacitor device that is superior to conventional capacitors and the power density is superior to that of a battery [66]. Moreover, there is no significant iR drop in the discharge segment of the GCD curve, which suggests a lower internal resistance in the electrochemical cell.…”

Section: Chronopotentiometry (Gcd)mentioning

confidence: 89%

Effect of graphite concentration on the electrochemical performance of a novel α-MnO₂-expanded graphite-PVDF composite cathode material based on FTO substrate

Philip,

Ruban Kumar

2024

Phys. Scr.

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A facile chemical reduction method is employed for the synthesis of α-MnO2 followed by ultrasonication with synthetic graphite and poly (vinylidene pyrrolidone) PVDF for the development of α-MnO2-expanded graphite-PVDF (MGP) composite. Known masses of MGP composite are drop-casted on a fluorine-doped tin oxide (FTO) conducting glass substrate for the fabrication of composite electrodes to use as the cathode. The compositional effects of various weight percentages of graphite on the electrochemical performance of the MGP composite are studied. The increase in graphite’s weight percentage is always accompanied by an equal reduction in the weight of MnO2 by maintaining a constant amount of PVDF. We demonstrate a maximum electrochemical performance for the composite containing 80% MnO2, 10% expanded graphite, and 10% PVDF, further increases in graphite concentration (reduction in that of MnO2) have detrimental effects on the performance. The basis characterisation of the composite is carried out using XRD, FTIR, UV-VIS, AFM, and SEM and the electrochemical studies are done using CV, GCD and EIS. We observe both faradaic and non-faradaic charge storage mechanisms in the composite samples with a 35% capacitive contribution and a 65% diffusive contribution to the total capacitance. Moreover, the composite electrode demonstrates a maximum specific capacitance of 358 F/g at 10 mV/s with an outstanding power density of 2.8 KW/Kg.

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Transition metal oxide–conducting polymer nanocomposites and metal-organic framework-based composites for supercapacitor application

Cited by 7 publications

References 102 publications

Solvent effects on the electrochemical performance of few layered MoS₂ electrodes fabricated using FTO substrates

Solvent effects on the electrochemical performance of few layered MoS₂ electrodes fabricated using FTO substrates

Square-Facet Nanobar MOF-Derived Co₃O₄@Co/N-doped CNT Core–Shell-based Nanocomposites as Cathode Materials for High-Performance Supercapacitor Studies

Effect of graphite concentration on the electrochemical performance of a novel α-MnO₂-expanded graphite-PVDF composite cathode material based on FTO substrate

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Transition metal oxide–conducting polymer nanocomposites and metal-organic framework-based composites for supercapacitor application

Cited by 7 publications

References 102 publications

Solvent effects on the electrochemical performance of few layered MoS2 electrodes fabricated using FTO substrates

Solvent effects on the electrochemical performance of few layered MoS2 electrodes fabricated using FTO substrates

Square-Facet Nanobar MOF-Derived Co3O4@Co/N-doped CNT Core–Shell-based Nanocomposites as Cathode Materials for High-Performance Supercapacitor Studies

Effect of graphite concentration on the electrochemical performance of a novel α-MnO2-expanded graphite-PVDF composite cathode material based on FTO substrate

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Product

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Solvent effects on the electrochemical performance of few layered MoS₂ electrodes fabricated using FTO substrates

Solvent effects on the electrochemical performance of few layered MoS₂ electrodes fabricated using FTO substrates

Square-Facet Nanobar MOF-Derived Co₃O₄@Co/N-doped CNT Core–Shell-based Nanocomposites as Cathode Materials for High-Performance Supercapacitor Studies

Effect of graphite concentration on the electrochemical performance of a novel α-MnO₂-expanded graphite-PVDF composite cathode material based on FTO substrate