Nickel-copper graphene foam prepared by atmospheric pressure chemical vapour deposition for supercapacitor applications

Matshoba, K.S.; Ochai-Ejeh, Faith U.; Mongwaketsi, N.; Mtshali, C.; Fabiane, Mopeli; Manyala, Ncholu I.

doi:10.1016/j.surfcoat.2019.125230

Cited by 25 publications

(22 citation statements)

References 36 publications

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“…However, the abovementioned properties are only observed in defect-free graphene, which is difficult and expensive to mass produce. Alternatively, there are cheaper and more simple ways to mass produce a slightly defective graphene, such as atmospheric pressure chemical vapor deposition (AP-CVD) [ 8 , 9 ]. The chemical phase exfoliation via the Hummer’s method of graphite oxide has been widely used, but this method produces a highly oxidized version of graphene [ 5 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Novel Thermally Reduced Graphene Oxide Microsupercapacitor Fabricated via Mask—Free AxiDraw Direct Writing

et al. 2021

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We demonstrate a simple method to fabricate all solid state, thermally reduced Graphene Oxide (TRGO) microsupercapacitors (µ-SCs) prepared using the atmospheric pressure chemical vapor deposition (APCVD) and a mask-free axiDraw sketching apparatus. The Fourier transform infrared spectroscopy (FTIR) shows the extermination of oxygen functional groups as the reducing temperature (RT) increases, while the Raman shows the presence of the defect and graphitic peaks. The electrochemical performance of the µ-SCs showed cyclic voltammetry (CV) potential window of 0–0.8 V at various scan rates of 5–1000 mVs−1 with a rectangular shape, depicting characteristics of electric double layer capacitor (EDLC) behavior. The µ-SC with 14 cm−2 (number of digits per unit area) showed a 46% increment in capacitance from that of 6 cm−2, which is also higher than the µ-SCs with 22 and 26 cm−2. The TRGO-500 exhibits volumetric energy and power density of 14.61 mW h cm−3 and 142.67 mW cm−3, respectively. The electrochemical impedance spectroscopy (EIS) showed the decrease in the equivalent series resistance (ESR) as a function of RT due to reduction of the resistive functional groups present in the sample. Bode plot showed a phase angel of −85° for the TRGO-500 µ-SC device. The electrochemical performance of the µ-SC devices can be tuned by varying the RT, number of digits per unity area, and connection configuration (parallel or series).

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Section: Introductionmentioning

confidence: 99%

Novel Thermally Reduced Graphene Oxide Microsupercapacitor Fabricated via Mask—Free AxiDraw Direct Writing

et al. 2021

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“…Thus, to control the number of graphene layers and the porosity of the final graphene foams, different porous catalysts, and different synthesis conditions have been considered. To this end, the substrate skeletons range from foams [ 4 , 5 , 16 , 17 , 18 ] or films [ 19 ] to nanopowders [ 20 , 21 , 22 ], from metals to metal oxide [ 23 ], to metal salts [ 24 ] or seashells [ 14 ]. Regarding the distribution of the pores, they are either randomly distributed or well-ordered using 3D printing [ 25 ].…”

Section: Synthesis and Processing Approach Using Chemical Vapor Depos...mentioning

confidence: 99%

“…Due to its low price and availability in various sizes/pore densities and thicknesses, commercial nickel foam with a pore size of ~200 to 500 µm is the most frequently employed template [ 4 , 5 , 16 , 17 , 18 ]. Regardless of the employed precursor (methane [ 4 ] or ethanol [ 5 ]) the graphene is precipitated on the surface of the Ni foam at atmospheric pressure and temperatures of 1000 °C, forming a continuous, interconnected network that copies perfectly the shape of the Ni template ( Figure 2 a,b).…”

Section: Synthesis and Processing Approach Using Chemical Vapor Depos...mentioning

confidence: 99%

3D Graphene Foam by Chemical Vapor Deposition: Synthesis, Properties, and Energy-Related Applications

Banciu¹,

Nastase

Istrate

et al. 2022

Molecules

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In this review, we highlight recent advancements in 3D graphene foam synthesis by template-assisted chemical vapor deposition, as well as their potential energy storage and conversion applications. This method offers good control of the number of graphene layers and porosity, as well as continuous connection of the graphene sheets. The review covers all the substrate types, catalysts, and precursors used to synthesize 3D graphene by the CVD method, as well as their most viable energy-related applications.

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“…102 Recently, a graphene foam composed mainly of mono-and bilayers was achieved by designing a Ni-Cu foam alloy. 103 Another group, starting from commercial Ni foam, created a Ni-Cu foam alloy where they further synthesized Cu-Ni microbranches of 2-5 microns in diameter and 20-30 microns in length. These highly dense microbranches reduced the percentage of empty porous space in the commercial Ni foam by up to 63%.…”

Section: Electrodes Fabricated With Graphene Foammentioning

confidence: 99%

Recent trends in graphene supercapacitors: from large area to microsupercapacitors

Velasco

Ryu

Boscá

et al. 2021

Sustainable Energy Fuels

149

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Nickel-copper graphene foam prepared by atmospheric pressure chemical vapour deposition for supercapacitor applications

Cited by 25 publications

References 36 publications

Novel Thermally Reduced Graphene Oxide Microsupercapacitor Fabricated via Mask—Free AxiDraw Direct Writing

Novel Thermally Reduced Graphene Oxide Microsupercapacitor Fabricated via Mask—Free AxiDraw Direct Writing

3D Graphene Foam by Chemical Vapor Deposition: Synthesis, Properties, and Energy-Related Applications

Recent trends in graphene supercapacitors: from large area to microsupercapacitors

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