Facile and scalable fabrication of graphene/polypyrrole/MnOx/Cu(OH)2 composite for high-performance supercapacitors

Miankushki, Hoda Nourmohammadi; Sedghi, Arman; Baghshahi, Saeid

doi:10.1007/s10008-018-4008-x

Cited by 12 publications

(3 citation statements)

References 75 publications

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“…The bigger diameter is related to higher resistance and vice versa [76]. R s is determined by the intercept of the plot at the real axis that shows the total resistance of the electrochemical system, including elemental resistance of electrode material, ionic resistance of the electrolyte, and contact resistance between the substrate and the active material [77,78]. The linear part in the lower frequency region indicates the Warburg impedance or the diffusion resistance.…”

Section: J O U R N a L P R E -P R O O F 16mentioning

confidence: 99%

Structural properties and supercapacitive performance evaluation of the nickel oxide/graphene/polypyrrole hybrid ternary nanocomposite in aqueous and organic electrolytes

Golkhatmi

Sedghi

Miankushki

et al. 2021

Energy

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Section: J O U R N a L P R E -P R O O F 16mentioning

confidence: 99%

Structural properties and supercapacitive performance evaluation of the nickel oxide/graphene/polypyrrole hybrid ternary nanocomposite in aqueous and organic electrolytes

Golkhatmi

Sedghi

Miankushki

et al. 2021

Energy

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“…Moreover, Raman spectroscopy is carried out to confirm that the graphene oxide is successfully transformed into the reduced graphene oxide (rGO) [ 52 , 53 , 54 , 55 ]. Figure 6 shows two characteristic Raman peaks at 1333 and 1582 cm −1 , corresponding to D- and G-bands, respectively.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Cu2O-Modified Reduced Graphene Oxide for NO2 Sensors

Huang

Wang

Ying

et al. 2021

Sensors

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Nowadays, metal oxide semiconductors (MOS)-reduced graphene oxide (rGO) nanocomposites have attracted significant research attention for gas sensing applications. Herein, a novel composite material is synthesized by combining two p-type semiconductors, i.e., Cu2O and rGO, and a p-p-type gas sensor is assembled for NO2 detection. Briefly, polypyrrole-coated cuprous oxide nanowires (PPy/Cu2O) are prepared via hydrothermal method and combined with graphene oxide (GO). Then, the nanocomposite (rGO/PPy/Cu2O) is obtained by using high-temperature thermal reduction under Ar atmosphere. The results reveal that the as-prepared rGO/PPy/Cu2O nanocomposite exhibits a maximum NO2 response of 42.5% and is capable of detecting NO2 at a low concentration of 200 ppb. Overall, the as-prepared rGO/PPy/Cu2O nanocomposite demonstrates excellent sensitivity, reversibility, repeatability, and selectivity for NO2 sensing applications.

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“…As can be seen, the Nyquist plots of both spectra show a negligible semi-circle in the high frequency region because of fast faradaic reactions, implying low R ct and good charge transfer [53]. The intercept on the real axis at the beginning of the semicircle part determine the ESR (R s ) which is combination of electrode material resistance, ionic resistance of electrolyte and contact resistance between current collector and electrode material [54]. ESR for NiMoO 4 /3D-rGO(II) electrode before cycling is 0.82 and after cycling the ESR value has increased to 0.9.…”

Section: Electrochemical Studiesmentioning

confidence: 95%

Synthesis of NiMoO4/3D-rGO Nanocomposite in Alkaline Environments for Supercapacitor Electrodes

et al. 2019

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Although Graphene oxide (GO)-based materials is known as a favorable candidate for supercapacitors, its conductivity needs to be increased. Therefore, this study aimed to investigate the performance of GO-based supercapicitor with new methods. In this work, an ammonia solution has been used to remove the oxygen functional groups of GO. In addition, a facile precipitation method was performed to synthesis a NiMoO4/3D-rGO electrode with purpose of using synergistic effects of rGO conductivity properties as well as NiMoO4 pseudocapacitive behavior. The phase structure, chemical bands and morphology of the synthesized powders were investigated by X-ray diffraction (XRD), Raman spectroscopy, and field emission secondary electron microscopy (FE-SEM). The electrochemical results showed that the NiMoO4/3D-rGO(II) electrode, where ammonia has been used during the synthesis, has a capacitive performance of 932 Fg−1. This is higher capacitance than NiMoO4/3D-rGO(I) without using ammonia. Furthermore, the NiMoO4/3D-rGO(II) electrode exhibited a power density of up to 17.5 kW kg−1 and an energy density of 32.36 Wh kg−1. These results showed that ammonia addition has increased the conductivity of rGO sheets, and thus it can be suggested as a new technique to improve the capacitance.

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Facile and scalable fabrication of graphene/polypyrrole/MnOx/Cu(OH)2 composite for high-performance supercapacitors

Cited by 12 publications

References 75 publications

Structural properties and supercapacitive performance evaluation of the nickel oxide/graphene/polypyrrole hybrid ternary nanocomposite in aqueous and organic electrolytes

Structural properties and supercapacitive performance evaluation of the nickel oxide/graphene/polypyrrole hybrid ternary nanocomposite in aqueous and organic electrolytes

Synthesis of Cu2O-Modified Reduced Graphene Oxide for NO2 Sensors

Synthesis of NiMoO4/3D-rGO Nanocomposite in Alkaline Environments for Supercapacitor Electrodes

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