Zinc oxide/activated carbon nanofiber composites for high-performance supercapacitor electrodes

Kim, Chang Hyo; Kim, Bo-Hye

doi:10.1016/j.jpowsour.2014.10.126

Cited by 227 publications

(115 citation statements)

References 52 publications

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“…To further understand (d) Fig. 7 a, [30], ZnO@C [35], T-NT@CoS 2 [36], Ni 3 Si 2 /CNFS [37], and SiC@Ni(OH) 4 [38]. Furthermore, the capacitive performance of the NiMn 2 O 4 nanosheets is also superior to that of NiMn 2 O 4 -based electrodes with other morphology types or prepared by other methods [39,40].…”

Section: Resultsmentioning

confidence: 93%

Growth and electrochemical performance of porous NiMn2O4 nanosheets with high specific surface areas

Yan

Qiu

et al. 2015

J Solid State Electrochem

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In this work, porous NiMn 2 O 4 nanosheets with large surface areas are successfully grown by a hydrothermal method and examined as electrodes for supe rcapac itors. Resu lts h ave sho wn th at the supercapacitor based on NiMn 2 O 4 electrodes exhibits the highest specific capacitance of 1321.6 F g −1 at a scan rate of 2 A g −1 , much higher than those of other supercapacitors made of metal oxides and composites. The NiMn 2 O 4 supercapacitor also shows a good cycling behavior, only 6.5 % capacitance decay after 1500 cycles. The NiMn 2 O 4 nanosheets possess a robust mechanical adhesion to Ni foam, which has been demonstrated by an ultrasonication test.

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Section: Resultsmentioning

confidence: 93%

Growth and electrochemical performance of porous NiMn2O4 nanosheets with high specific surface areas

Yan

Qiu

et al. 2015

J Solid State Electrochem

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“…The strong resolution Zn 2p spectrum is presented in (Fig. 4(b)), of which two strong peaks at 1022.02 and 1045.05 eV can be clearly seen, corresponding to the binding energy of Zn 2p 3/2 and Zn 2p 1/2, respectively, indicating the presence of Zn 2+ in the ZnO wurtzite structure24. It is observed that there is an energy separation of 23 eV between the Zn 2p 3/2 and Zn 2p 1/2 peaks, which is in agreement with an earlier report on ZnO25.…”

Section: Resultsmentioning

confidence: 99%

Preparation and electrochemical performances of carbon sphere@ZnO core-shell nanocomposites for supercapacitor applications

Xiao

Han

Chen

et al. 2017

Sci Rep

106

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Carbon sphere (CS)@ZnO core-shell nanocomposites were successfully prepared through facile low-temperature water-bath method without annealing treatment. The morphology and the microstructure of samples were characterized by transition electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), respectively. ZnO nanoparticles with several nanometers in size decorated on the surface of the carbon sphere and formed a core-shell structure. Electrochemical performances of the CS@ZnO core-shell nanocomposites electrodes were investigated by cyclic voltammetry (CV) and galvanostatic charge/discharge (GDC). The CS@ZnO core-shell nanocomposite electrodes exhibit much larger specific capacitance and cycling stability is improved significantly compared with pure ZnO electrode. The CS@ZnO core-shell nanocomposite with mole ratio of 1:1 achieves a specific capacitance of 630 F g−1 at the current density of 2 A g−1. Present work might provide a new route for fabricating carbon sphere and transition metal oxides composite materials as electrodes for the application in supercapacitors.

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“…3E) at 2p3/2 and 2p1/2 were detected at 1044.3 eV and 1021 eV, respectively, for CNF-ZnO, which were attributed to Zn(II) being bonded to an oxygen atom to form ZnO. 44,45 CNF-NiO (Fig. 3F) also recorded a characteristic peak of Ni 2p5/2 at 754.7 eV, corresponding to NiO, 46 along with the corresponding detected peaks for C 1s and O 1s.…”

Section: 41mentioning

confidence: 97%

Electrospun nanofiber membranes as ultrathin flexible supercapacitors

et al. 2017

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A highly flexible electrochemical supercapacitor electrode was developed with a novel metal oxide-reinforced nanofiber electrode by utilizing a solution-based electrospinning technique. The facile fabrication steps involved the introduction of metal precursors into a polymeric solution, which was subjected to an in situ electrospinning process. The electrospun polymeric web with metallic ingredients was then subjected to an oxidative stabilization process that induced the formation of metal oxide nanoparticles within the polymer structure. Finally, the metal oxide nanoparticles incorporated with nanofibers were obtained using a carbonization process, thus converting the polymer backbones into a carbon-rich conductive nanofiber structure. The fabricated nanofibers were decorated and implanted with metal oxide nanoparticles that had a surface-decorated structure morphology due to the solubility of the precursors in the reaction solution.The electrochemical performance of the fabricated metal oxide reinforced with nanofiber electrodes was investigated as an electrochemical system, and the novel morphology significantly improved the specific capacitance compared to a pristine carbon nanofiber membrane. As a result of the uniform dispersion of metal oxide nanoparticles throughout the surface of the nanofibers, the overall capacitive behavior of the membrane was enhanced. Furthermore, a fabricated free-standing flexible device that utilized the optimized nanofiber electrode demonstrated high stability even after it was subjected to various bending operations and curvatures. These promising results showed the potential applications of these lightweight, conductive nanofiber electrodes in flexible and versatile electronic devices.

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Zinc oxide/activated carbon nanofiber composites for high-performance supercapacitor electrodes

Cited by 227 publications

References 52 publications

Growth and electrochemical performance of porous NiMn2O4 nanosheets with high specific surface areas

Growth and electrochemical performance of porous NiMn2O4 nanosheets with high specific surface areas

Preparation and electrochemical performances of carbon sphere@ZnO core-shell nanocomposites for supercapacitor applications

Electrospun nanofiber membranes as ultrathin flexible supercapacitors

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