Preparation and capacitive properties of cobalt–nickel oxides/carbon nanotube composites

Fan, Zhen; Chen, Jinhua; Cui, Kunzai; Sun, Feng; Xu, Youlong; Kuang, Yafei

doi:10.1016/j.electacta.2006.09.029

Cited by 201 publications

(101 citation statements)

References 42 publications

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“…It can be expected that this is a much higher value than any other reports employing Co-Ni mixed oxides 21,26,27 ).…”

contrasting

confidence: 40%

“…Comparing these with the shapes of some voltammograms from other reports, 21,[26][27][28] the CV shapes at low scan rate (e.g., 10-50 mV s ) are very close to that of a nickel oxide/ carbon nanotube electrode 26 and a Co-Ni oxide/Ni mesh electrode, 27 in which the oxidation and reduction peaks appear at near 0.4 and 0.2 V, respectively. These redox peaks may correspond to the formation of nickel hydroxide at the surface of nickel oxide by the following reaction 29,30 in an aqueous KOH solution:…”

mentioning

confidence: 67%

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Supercapacitive Properties of Co-Ni Mixed Oxide Electrode Adopting the Nickel Foam as a Current Collector

Cho¹,

Nam²,

Park³

et al. 2012

Bulletin of the Korean Chemical Society

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Three-dimensional porous nickel foam was used as a current collector to prepare a Co-Ni oxide/Ni foam electrode for a supercapacitor. The synthesized Co-Ni oxide was proven to consist of mixed oxide phases of Co 3 O 4 and NiO. The Co-Ni oxide/Ni foam electrode prepared was characterized by morphological observation, crystalline property analysis, cyclic voltammetry, and impedance spectroscopy. Cyclic voltammetry for the electrode showed high specific capacitances, such as 936 F g −1 at 5 mV s −1 and 566 F g −1 at 200 mV s, and a comparatively good cycle performance. These improved results were mainly due to the dimensional stability of the nickel foam and its high electrical contact between the electrode material and the current collector substrate.

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“…It can be expected that this is a much higher value than any other reports employing Co-Ni mixed oxides 21,26,27 ).…”

contrasting

confidence: 40%

mentioning

confidence: 67%

Supercapacitive Properties of Co-Ni Mixed Oxide Electrode Adopting the Nickel Foam as a Current Collector

Cho¹,

Nam²,

Park³

et al. 2012

Bulletin of the Korean Chemical Society

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“…Metal oxides 3,11 and conducting polymers 12,13 are typical pseudocapacitive materials that have been vastly reported. To further enhance the capacitance, MWCNTs have been mixed with conducting polymers 2,7,8 and metal oxides.…”

Section: 10mentioning

confidence: 99%

Comparison of GO, GO/MWCNTs composite and MWCNTs as potential electrode materials for supercapacitors

Aboutalebi

Chidembo

Salari

et al. 2011

Energy Environ. Sci.

447

270

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We report the synthesis of graphene oxide/multi-walled carbon nanotube (MWCNT) composites employing an alternative and novel approach for possible application as supercapacitor materials in energy storage devices. Integrating these nanostructures resulted in a strong synergistic effect between the two materials consequently leading to a robust and superior hybrid material with higher capacitance compared to either graphene oxide or MWCNTs. Specific capacitances of 251, 85 and 60 F g À1 were obtained for graphene oxide-multi-walled carbon nanotubes, MWCNTs and graphene oxide, respectively, in a potential range from À0.1 to 0.5 V. Most importantly, a 120% increase in capacitance was observed with increasing cycle number at 20 mV s À1. The ease of synthesis and the exceptional electrochemical properties make the use of this nanostructure an attractive, alternative way of designing future supercapacitors in both conventional fields and new emerging areas.

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“…Among metal oxides, Co oxides are normally reported to 30 have high redox activity and good reversibility, but specific capaci-31 tance is relatively low [4]. Some Co-based oxides or Co hydroxides 32 have been reported to exhibit high specific capacitance [5][6][7]. How-33 ever, carbon nanotube or nanofiber seems to be one important 34 reason in improving their specific capacitance.…”

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confidence: 99%

The specific capacitance of sol–gel synthesised spinel MnCo2O4 in an alkaline electrolyte

Kong

Lü

Liu

et al. 2014

Electrochimica Acta

138

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Preparation and capacitive properties of cobalt–nickel oxides/carbon nanotube composites

Cited by 201 publications

References 42 publications

Supercapacitive Properties of Co-Ni Mixed Oxide Electrode Adopting the Nickel Foam as a Current Collector

Supercapacitive Properties of Co-Ni Mixed Oxide Electrode Adopting the Nickel Foam as a Current Collector

Comparison of GO, GO/MWCNTs composite and MWCNTs as potential electrode materials for supercapacitors

The specific capacitance of sol–gel synthesised spinel MnCo2O4 in an alkaline electrolyte

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