Preparation, characterization, and electrochemical studies of sulfur-bearing nickel in an ammoniacal electrolyte: the influence of thiourea

Yang, Di; Zhu, S.J.; Li, Dong

doi:10.1007/s10008-012-1753-0

Cited by 12 publications

(8 citation statements)

References 23 publications

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“…The XRD analysis in Figure illustrates that the Ni foam and PPy‐coated Ni foam have the same set of peaks, implying that the Ni foam is still exposed despite the electrodeposition of PPy, which is in agreement with the FESEM image in Figure a (ii). When PPy/GO and PPy/GO/MnOx were deposited on the Ni foam, the peak intensities of 76.3° with (220) reflection and 92.9° with (311) reflection diminished significantly, evidencing the good coverage of the binary and ternary nanocomposites on the Ni foam . These results are consistent with the FESEM images, which are depicted in Figure a (iii) and (iv), where the Ni foam is well covered by PPy/GO/MnOx.…”

Section: Resultssupporting

confidence: 85%

Fabrication of flexible polypyrrole/graphene oxide/manganese oxide supercapacitor

Lim

et al. 2014

Int. J. Energy Res.

110

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SUMMARYA flexible polypyrrole/graphene oxide/manganese oxide-based supercapacitor was prepared via an electrodeposition process. The polypyrrole, graphene oxide, and manganese oxide were deposited onto a flexible and highly porous nickel foam, which acted as a current collector to enhance the electrochemical performances. The good coverage of the polypyrrole, graphene oxide, and manganese oxide onto the scaffold of the nickel foam was evidenced using field emission scanning electron microscopy and X-ray diffraction. The manganese species, which were present in the oxidation states of Mn 3+ and Mn 4+ , were shown using X-ray photoelectron spectroscopy. The presence of Mn 2 O 3 and MnO 2 polymorphs was detected using Fourier transform infrared and Raman spectroscopies. The cyclic stability of the ternary supercapacitor was consistent regardless of its geometry and curvature. In contrast, an activated carbon supercapacitor possesses limited energy storage capability compared to a ternary supercapacitor, which suppresses the electrochemical performances of activated carbon. The ternary as-fabricated supercapacitor could retain a specific capacitance of 96.58% after 1000 cycles, and the as-synthesized energy storage device was able to light up a light emitting diode.

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Section: Resultssupporting

confidence: 85%

Fabrication of flexible polypyrrole/graphene oxide/manganese oxide supercapacitor

Lim

et al. 2014

Int. J. Energy Res.

110

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“…The good adhesion of the Bi 2 O 3 /MnO 2 over the nickel foam scaffold was confirmed through the tremendous decrease in the intensity peak of the nickel foam upon the introduction of active materials. The diffraction peaks detected at 43, 52, and 77° correspond to the lattice planes of (111), (200), and (220), which indicate the crystallographic planes of nickel. − The major detection point for the nickel foam is ascribed to the low concentration of precursors used. In addition, the XRD profile shows the absence of additional crystalline peaks, which is evidence that an impurity free nanocomposite was successfully synthesized.…”

Section: Resultsmentioning

confidence: 99%

Effects of Temperature on Electrochemical Properties of Bismuth Oxide/Manganese Oxide Pseudocapacitor

Lim²,

Hayase

et al. 2018

Ind. Eng. Chem. Res.

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In this study, a temperature investigation is conducted on a bismuth oxide/manganese oxide (Bi2O3/MnO2) supercapacitor to determine how temperature affects the performances of the supercapacitor. Energy and power densities of 9.5 Wh kg–1 and 102.6 W kg–1 are obtained at 60 °C, respectively, which are approximately twice the values for supercapacitors at 0 °C and 1.37-fold higher than those at 30 °C. Additionally, the supercapacitors achieve energy densities of 4.9 and 6.9 Wh kg–1, and power densities of 53.8 and 74.8 W kg–1 at 0 and 30 °C, respectively. Interestingly, the hybrid Bi2O3/MnO2 active materials exhibit superior stability and reversibility, retaining 95% of the original capacitance at 30 °C and >75% at the high temperature of 60 °C. Although the cooler supercapacitor exhibits a slightly higher resistive performance, its excellent capacitance retention upon continuous charging/discharging measurement at 0 °C shows its potential for use as an all-weather compatible supercapacitor in the automotive sector.

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“…This indicates that no additional crystalline phase was introduced into the nanocomposite [24]. The XRD pattern of the bare nickel foam shows typical peaks corresponding to the (220) and (311) cystallographic planes of nickel [25,26]. The high intensity peak at 92.9°( 311) for the nickel foam decreased tremendously for all the electrodeposited nickel foam, suggesting the adhesion of the materials enveloping the structure.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical properties of free-standing polypyrrole/graphene oxide/zinc oxide flexible supercapacitor

Chee

Lim

Huang

2014

Int. J. Energy Res.

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SUMMARY We report the preparation of a polypyrrole/graphene oxide/zinc oxide nanocomposite on a nickel foam using a simple and rapid single‐step electrochemical deposition process under ambient conditions. A free‐standing flexible supercapacitor was fabricated by sandwiching a polyvinyl alcohol hydrogel polymer electrolyte between two layers of the as‐prepared ternary nanocomposite electrodes. The electrochemical properties of the free‐standing supercapacitor were analyzed using a two‐electrode system. The supercapacitor achieved a specific capacitance of 123.8 F/g at 1 A/g, which was greater than its single (39.1 F/g) and binary (81.3 F/g) counterparts. This suggests that ZnO acts as a spacer and support that hinders the ternary structure from collapsing and subsequently enhances the diffusion of ions within the matrix. The flexible supercapacitor exhibited remarkable electrochemical stability when subjected to bending at various angles. The cycling stability of the ternary nanocomposite showed a favorable specific capacitance retention of more than 90% after 1000 cycles for mild alkaline electrolytes compared with strong alkali electrolytes. The presence of glycerin in the polymer electrolyte enabled the supercapacitor to perform better under the vigorous cycling condition. The potential of the as‐fabricated supercapacitor for real applications was manifested by its ability to light up a light‐emitting diode after being charged. Copyright © 2014 John Wiley & Sons, Ltd.

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Preparation, characterization, and electrochemical studies of sulfur-bearing nickel in an ammoniacal electrolyte: the influence of thiourea

Cited by 12 publications

References 23 publications

Fabrication of flexible polypyrrole/graphene oxide/manganese oxide supercapacitor

Fabrication of flexible polypyrrole/graphene oxide/manganese oxide supercapacitor

Effects of Temperature on Electrochemical Properties of Bismuth Oxide/Manganese Oxide Pseudocapacitor

Electrochemical properties of free-standing polypyrrole/graphene oxide/zinc oxide flexible supercapacitor

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