Facile synthesis of Cu2O/CuO/RGO nanocomposite and its superior cyclability in supercapacitor

Wang, Kun; Dong, Xiangmao; Zhao, Chongjun; Qian, Xiuzhen; Xu, Yunlong

doi:10.1016/j.electacta.2014.11.171

Cited by 236 publications

(97 citation statements)

References 57 publications

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“…Among them, monoclinic tenorite copper oxide (CuO; space group C2/c) is attractive due to its merits, including an important p-type semiconductor with a narrow band gap energy (1.2 eV), non-toxicity, excellent chemical stability, lower cost, environmental stability, and desirable optical, electrical, and electrochemical properties [1]. Therefore, it has been widely investigated for many optoelectronic devices, catalysis, gas sensor, optical switch, magnetic storage media, energy storage, solar energy transformation (theoretical efficiency being 18%), field emission device and lithium ion batteries [1][2][3][4][5]. When the n-type semiconductor metal oxide is mixed with the p-type semiconductor metal oxide, it might be useful for new applications in material science.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the structural, optical and magnetic properties of CuO/CuFe2O4 nanocomposites synthesized via simple microemulsion method

Rashad

Soltan

Ramadan

et al. 2015

Ceramics International

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Section: Introductionmentioning

confidence: 99%

Investigation of the structural, optical and magnetic properties of CuO/CuFe2O4 nanocomposites synthesized via simple microemulsion method

Rashad

Soltan

Ramadan

et al. 2015

Ceramics International

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“…Co 3 O 4 , 8 MnO 2 ,9 CuO,10 etc.have been widely employed as positive electrode for asymmetric supercapacitors. Recently, binary metal oxides have received increasing attention due to their superior conductivity and electrochemical activity compared to monometallic oxides 11.…”

mentioning

confidence: 99%

Hydrothermal synthesis of CuCo₂O₄/CuO nanowire arrays and RGO/Fe₂O₃ composites for high-performance aqueous asymmetric supercapacitors

et al. 2016

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Traditional asymmetric supercapacitors are severely restricted due to the low specific capacitance of carbon negative materials. The rational design of positive and negative electrodes that afford the asymmetric device with high performances is particularly important. In this paper, we fabricate a novel cost-effective and environmental-friendly aqueous asymmetric supercapacitor by using CuCo 2 O 4 /CuO nanowire arrays as positive electrode and RGO/Fe 2 O 3 composites as negative electrode. The assembled device exhibits a high energy density of 33.0 Wh kg -1 at a power density of 200 W kg -1 , and can still operate at a high power density of 8.0 KW kg -1 with an energy density of 9.1 Wh kg -1 . The current strategy will provide a fresh route for design and fabricate of novel asymmetric supercapacitors with both high energy density and high power density.

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“…Moreover, to measure the near‐surface elemental composition and the chemical states, XPS spectra of (Ni, Cu) Se 2 ‐0.30 (0.30 represents the molar of CuCl 2 ⋅ H 2 O) is displayed in Figure (b). From what is shown in Figure (c), the peak at 932.48 eV and 944.08 eV can be ascribed to Cu 2p3/2, while the peak at 952.88 eV is originated from Cu 2p1/2 peak of Cu 2+ . Moreover, in Figure (d), the peaks and their corresponding substances are elucidated.…”

Section: Resultsmentioning

confidence: 72%

Construction of (Ni, Cu) Se₂//Reduced Graphene Oxide for High Energy Density Asymmetric Supercapacitor

et al. 2017

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Selenide, particularly transition‐metal selenide, is gaining popularity for use as electrode materials in electrochemical capacitors, because they are low cost, highly conductive, earth abundant, and environmentally benign. Here, we fabricated (Ni, Cu) Se2 nanowires on nickel foam (NF) with a facile one‐pot hydrothermal method. Upon rational design and careful growth control, regular (Ni, Cu) Se2 nanowires of several micrometers in length were grown, having an areal specific capacitance of 5.92 F cm−2 at a current density of 2 mA cm−2. Afterwards, an asymmetric supercapacitor was assembled by selecting the (Ni, Cu) Se2 nanowire/NF as the positive electrode, and reduced graphene oxide (RGO) as the negative electrode, delivering an ultrahigh energy density of 44.46 Wh kg−1 at a power density of 797.9 W kg−1, and when tested at an ultrahigh power density of 9796.7 W kg−1, an energy density of 6.53 Wh kg−1 can be still maintained, evidencing its potential applications. Besides its high energy density features, it is impressive to notice that the energy density still maintains 97.56 % even after 4000‐cycle fierce cycling at an ultrahigh current density of 50 mA cm−2. To the best of our knowledge, it is the first‐ever reported (Ni, Cu) Se2‐based supercapacitor/asymmetric supercapacitor. This work may arouse new interest for designing and growing transition‐metal selenide and/or metal selenide for large‐scale, practical supercapacitor applications.

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Facile synthesis of Cu2O/CuO/RGO nanocomposite and its superior cyclability in supercapacitor

Cited by 236 publications

References 57 publications

Investigation of the structural, optical and magnetic properties of CuO/CuFe2O4 nanocomposites synthesized via simple microemulsion method

Investigation of the structural, optical and magnetic properties of CuO/CuFe2O4 nanocomposites synthesized via simple microemulsion method

Hydrothermal synthesis of CuCo₂O₄/CuO nanowire arrays and RGO/Fe₂O₃ composites for high-performance aqueous asymmetric supercapacitors

Construction of (Ni, Cu) Se₂//Reduced Graphene Oxide for High Energy Density Asymmetric Supercapacitor

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Facile synthesis of Cu2O/CuO/RGO nanocomposite and its superior cyclability in supercapacitor

Cited by 236 publications

References 57 publications

Investigation of the structural, optical and magnetic properties of CuO/CuFe2O4 nanocomposites synthesized via simple microemulsion method

Investigation of the structural, optical and magnetic properties of CuO/CuFe2O4 nanocomposites synthesized via simple microemulsion method

Hydrothermal synthesis of CuCo2O4/CuO nanowire arrays and RGO/Fe2O3 composites for high-performance aqueous asymmetric supercapacitors

Construction of (Ni, Cu) Se2//Reduced Graphene Oxide for High Energy Density Asymmetric Supercapacitor

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Hydrothermal synthesis of CuCo₂O₄/CuO nanowire arrays and RGO/Fe₂O₃ composites for high-performance aqueous asymmetric supercapacitors

Construction of (Ni, Cu) Se₂//Reduced Graphene Oxide for High Energy Density Asymmetric Supercapacitor