Hybrid structure of zinc oxide nanorods and three dimensional graphene foam for supercapacitor and electrochemical sensor applications

Dong, Xiaochen; Cao, Yunfa; Wang, Jing; Chan‐Park, Mary B.; Wang, Lianhui; Huang, Wei; Chen, Peng

doi:10.1039/c2ra01295b

Cited by 304 publications

(181 citation statements)

References 50 publications

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“…A variety of successful approaches for preparing graphenemetal composites have been reported. For instance, electrodeposition [13,14], chemical reduction [15][16][17][18], epitaxial deposition [19] and chemical vapour deposition [20] have been used. However, it is usually difficult to achieve uniform and homogeneous coating of the graphene surface through some of these deposition techniques [21].…”

Section: Introductionmentioning

confidence: 99%

Silver nanoparticles decorated on a three-dimensional graphene scaffold for electrochemical applications

Bello

Fabiane

Dodoo‐Arhin

et al. 2014

Journal of Physics and Chemistry of Solids

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Silver metal nanoparticles were decorated by electron beam evaporation on graphene foam (GF) grown by chemical vapour deposition. X-ray diffraction, Raman spectroscopy, scanning and transmission electron microscopy, and atomic force microscopy were used to investigate the structure and morphology of the graphene foam/silver nanoparticles (GF/Ag). Both samples were tested as electrodes for supercapacitors. The GF/Ag exhibited a significantly higher capacitive performance, including a specific capacitance value of (~110 Fg -1 ) and excellent cyclability in a three-electrode electrochemical cell. These results demonstrate that graphene foam could be an excellent platform for metal particles for investigating improved electrochemical performance.

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Section: Introductionmentioning

confidence: 99%

Silver nanoparticles decorated on a three-dimensional graphene scaffold for electrochemical applications

Bello

Fabiane

Dodoo‐Arhin

et al. 2014

Journal of Physics and Chemistry of Solids

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“…The resulting GNS also exhibit inferior conductivity due to the abundant existence of defects and oxygen-containing chemical groups, and to numerous non-ideal contacts between the nanosheets. In addition, the strong π-π interaction between GNS leads to severe aggregation and a considerable decrease in its specific surface area [21]. Both of these shortcomings seriously limit the performance of graphene-based supercapacitors, sensors and other devices.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis of simonkolleite microplatelets on nickel foam-graphene for electrochemical supercapacitors

Khamlich

Bello

Fabiane

et al. 2013

J Solid State Electrochem

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Nickel foam-graphene (NF-G) was synthesised by chemical vapour deposition (CVD) followed by facial in situ aqueous chemical growth of simonkolleite (Zn 5 (OH) 8 Cl 2 ·H 2 O) under hydrothermal conditions to form NF-G/simonkolleite composite. X-ray diffraction and Raman spectroscopy show the presence of simonkolleite on the NF-G, while scanning electron and transmission electron microscopies show simonkolleite micro-plates like structure evenly distributed on the NF-G. Electrochemical measurements of the composite electrode give a specific capacitance of 350 Fg -1 at current density of 0.7 Ag -1 for our device measured in three-electrode configuration. The composite also shows a rate capability of 87% capacitance retention at a high current density of 5 Ag -1 , which makes it a promising candidate as an electrode material for supercapacitor applications.

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“…A variety of manufacturing methods opens a new field of research. Manufacturing processes can be distinguished between a template-based [9][10][11] and a templatefree [12] methods for the direct production of carbon aerogels. In addition, assembly of graphitic structures [13][14][15][16] can be carried out.…”

Section: Introductionmentioning

confidence: 99%

Structural improvement of a bio-inspired 3D globular carbon foam by a continuously thermal treatment: A comprehensive study

Marx¹,

Beisch²,

Garlof³

et al. 2017

Adv Mater Sci

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The manufacturing of a 3D interconnected globular carbon foam, called Globugraphite, is based on the replication of the zinc oxide (ZnO) template morphology by carbon with simultaneous removing of the template material in the chemical vapour deposition (CVD -replica CVD (rCVD)) process. The growth mechanism of the presented carbon foam affected the formation of defects at the atomic level which leads in the following to graphitic pieces instead of layers. This substructure influences properties, such as electrical conductivity of the carbon foam negatively. By undergoing a temperature treatment at 1600°C, 1800°C, 2000°C and 2200°C in a protective gas atmosphere the carbon structure heals at the atomic level. The connection of the sp 2 /sp 3 graphitic pieces to graphitic sp 2 layers due to the thermal annealing is analysed via transmission electron microscopy (TEM) observation and Raman spectroscopy. Based on these analysis methods a model of the graphitization progress is created which explains the clearly increase of the electrical conductivity and the oxidation temperature.

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Hybrid structure of zinc oxide nanorods and three dimensional graphene foam for supercapacitor and electrochemical sensor applications

Cited by 304 publications

References 50 publications

Silver nanoparticles decorated on a three-dimensional graphene scaffold for electrochemical applications

Silver nanoparticles decorated on a three-dimensional graphene scaffold for electrochemical applications

Hydrothermal synthesis of simonkolleite microplatelets on nickel foam-graphene for electrochemical supercapacitors

Structural improvement of a bio-inspired 3D globular carbon foam by a continuously thermal treatment: A comprehensive study

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