Three-dimensional flower-like nickel oxide supported on graphene sheets as electrode material for supercapacitors

Ge, Chongyong; Hou, Zhaohui; He, Binhong; Zeng, Fanyan; Cao, Jian; Liu, Yiming; Kuang, Yafei

doi:10.1007/s10971-012-2778-7

Cited by 68 publications

(31 citation statements)

References 32 publications

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“…The diffraction peaks located at 2q ¼ 37 , 43 , 63 , 75 and 79 as shown in Fig. 1(bec) correspond to the (111), (200), (220), (311) and (222) planes of the NiO (JCPDS 47-1049), respectively, which demonstrate the nuclear and crystallization of NiO during the fabrication process [15,39]. And the absence of the diffraction peak of GO indicates the reduction of GO during the hydrothermal process [38,40].…”

Section: Resultsmentioning

confidence: 95%

Facile synthesis of the N-doped graphene/nickel oxide with enhanced electrochemical performance for rechargeable lithium-ion batteries

Yang

Qing

et al. 2017

Materials Chemistry and Physics

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Section: Resultsmentioning

confidence: 95%

Facile synthesis of the N-doped graphene/nickel oxide with enhanced electrochemical performance for rechargeable lithium-ion batteries

Yang

Qing

et al. 2017

Materials Chemistry and Physics

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“…The calculated average grain size of Fe 2 O 3 is 4.8 nm by the Debye–Scherrer equation

D = \frac{K γ}{B normalC normalO normalS θ}

. Moreover, the characteristic peaks at 37.4, 43.3, 63.1, and 76.1° correspond well with the (111), (200), (220), and (222) crystal planes of the residual NiO, which could not be removed by HCl.…”

Section: Resultsmentioning

confidence: 68%

Ultrasmall Fe₂O₃ Nanoparticles Anchored on Three‐Dimensional Hierarchical Porous Graphene‐like Networks for High Rate Capability Supercapacitors

Zhang

Chen

et al. 2016

ChemElectroChem

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An ultrasmall Fe2O3 nanoparticle/three‐dimensional hierarchical porous graphene‐like (Fe2O3/3D HPG) composite has been synthesized by a facile hydrothermal method, which is investigated as a high performance electrode material for supercapacitors. In the composite, the ultra‐small‐sized Fe2O3 nanoparticles, with an average size of approximately 5 nm, are uniformly distributed on the 3D HPG substrate. The as‐prepared Fe2O3/3D HPG composite electrode exhibits good electrochemical performance with a maximum specific capacitance of 967 F g−1 at 1.0 A g−1 in the three‐electrode system in 2.0 mol L−1 KOH aqueous solution, and an outstanding rate capability (74 % capacitance retention at 30 A g−1). In addition, the composite electrode also exhibits an excellent cycling performance with 92 % capacitance retention of the initial capacity after 5000 cycles at 1.0 A g−1.

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“…37 Furthermore, the lower resistance of GN-f is favorable for enhancing capacitive properties too. In addition, the 3D flowerlike morphology of NiO is favorable to the occurrence of pseudocapacitance of NiO resulting in an improved specific capacitance of the composite because of its short diffusion path lengths for both electrolyte ions and electrons, favoring the diffusion and migration of electrolyte ions during the rapid charge-discharge process and consequently improving the effective electrochemical utilization of NiO.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of shape-controlled NiO–graphene nanocomposites with enhanced supercapacitive properties

et al. 2015

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Flowerlike and polyhedral NiO-graphene nanocomposites have been successfully synthesized using a facile hydrothermal method. The formation mechanism of the two nanocomposites with different morphologies has been studied. The resulting products are characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopic analysis (XPS), thermogravimetry (TG), and the Brunauer-Emmett-Teller (BET) method. The prepared NiO-graphene nanocomposites with different shapes can be used for supercapacitor electrode materials. Through electrochemical tests, the flowerlike NiO-graphene composite shows higher specific capacitance than that of the polyhedral one with a specific capacitance as high as 500 F g À1 at a scan rate of 5 mV s À1 while the polyhedral NiO-graphene composite delivers better long-term cycle stability with 84% specific capacitance remaining after 3000 cycles in a 1 M KOH electrolyte.

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Three-dimensional flower-like nickel oxide supported on graphene sheets as electrode material for supercapacitors

Cited by 68 publications

References 32 publications

Facile synthesis of the N-doped graphene/nickel oxide with enhanced electrochemical performance for rechargeable lithium-ion batteries

Facile synthesis of the N-doped graphene/nickel oxide with enhanced electrochemical performance for rechargeable lithium-ion batteries

Ultrasmall Fe₂O₃ Nanoparticles Anchored on Three‐Dimensional Hierarchical Porous Graphene‐like Networks for High Rate Capability Supercapacitors

Synthesis of shape-controlled NiO–graphene nanocomposites with enhanced supercapacitive properties

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Three-dimensional flower-like nickel oxide supported on graphene sheets as electrode material for supercapacitors

Cited by 68 publications

References 32 publications

Facile synthesis of the N-doped graphene/nickel oxide with enhanced electrochemical performance for rechargeable lithium-ion batteries

Facile synthesis of the N-doped graphene/nickel oxide with enhanced electrochemical performance for rechargeable lithium-ion batteries

Ultrasmall Fe2O3 Nanoparticles Anchored on Three‐Dimensional Hierarchical Porous Graphene‐like Networks for High Rate Capability Supercapacitors

Synthesis of shape-controlled NiO–graphene nanocomposites with enhanced supercapacitive properties

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Ultrasmall Fe₂O₃ Nanoparticles Anchored on Three‐Dimensional Hierarchical Porous Graphene‐like Networks for High Rate Capability Supercapacitors