Synthesis of Co3O4/reduced graphene oxide by one step-hydrothermal and calcination method for high-performance supercapacitors

Yue, Xiaoming; Liu, Zijing; Xiao, Cui-Cui; Ye, Mei; Ge, Zan-Peng; Cheng, Ping; Gu, Zi-Yi; Zhu, Junsheng; Zhang, Shuangquan

doi:10.1007/s11581-020-03797-x

Cited by 29 publications

(13 citation statements)

References 45 publications

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“…To further confirm the chemical composition of rGO/Co 3 O 4 and rGO/CoFe 2 O 4 composites, X-ray photoelectron spectroscopy (XPS) measurements were analyzed. The XPS spectra for rGO fabricated from coconut coir under similar conditions has previously been reported elsewhere [ 60 , 61 ]. Figure 2 c shows the typical XPS survey spectra for the rGO/Co 3 O 4 and rGO/CoF 2 O 4 , which reveal the presence of Co2p, Fe2p, O1s, C1s and of Co2p, O1s, C1s in rGO/CoF 2 O 4 and rGO/Co 3 O 4 , respectively.…”

Section: Resultsmentioning

confidence: 99%

Spinel CoFe2O4 Nanoflakes: A Path to Enhance Energy Generation and Environmental Remediation Potential of Waste-Derived rGO

et al. 2022

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Carbon nanomaterials derived from agricultural waste streams present an exciting material platform that hits multiple sustainability targets by reducing waste entering landfill, and enabling clean energy and environmental remediation technologies. In this work, the energy and photocatalytic properties of reduced graphene oxide fabricated from coconut coir using a simple reduction method using ferrocene are substantially improved by introducing metallic oxides flakes. A series of cobalt ferrite rGO/CoFe2O4 nanocomposites were assembled using a simple soft bubble self-templating assembly, and their potential for clean energy applications confirmed. The transmission electron microscopy images revealed the uniform dispersion of the metal oxide on the rGO sheets. The functional group of the as synthesized metal oxide and the rGO nanocomposites, and its individual constituents, were identified through the FTIR and XPS studies, respectively. The composite materials showed higher specific capacitance then the pure materials, with rGO spinal metal oxide nanocomposites showing maximum specific capacitance of 396 F/g at 1 A/g. Furthermore, the hybrid super capacitor exhibits the excellent cyclic stability 2000 cycles with 95.6% retention. The photocatalytic properties of the synthesized rGO nanocomposites were analyzed with the help of malachite green dye. For pure metal oxide, the degradation rate was only around 65% within 120 min, while for rGO metal oxide nanocomposites, more than 80% of MG were degraded.

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Section: Resultsmentioning

confidence: 99%

Spinel CoFe2O4 Nanoflakes: A Path to Enhance Energy Generation and Environmental Remediation Potential of Waste-Derived rGO

et al. 2022

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“…Co 3 O 4 /rGO, having Co 3 O 4 dispersed on rGO in three‐dimensional disposition, exhibited good electrochemical properties (capacitance of 1152 Fg −1 ). It also showed much higher capacitance compared to Co 3 O 4 nanowires 44,45 . Again, hydrothermally grown Co 3 O 4 nanowires on Co 3 O 4 nanosheets demonstrated promising electrochemical properties with a very high specific capacitance of 2053.1 Fg −1 at 1 Ag −1 46 …”

Section: Pure and Mixed Tmos As Materials For Electrodes Of Energy St...mentioning

confidence: 92%

“…It also showed much higher capacitance compared to Co 3 O 4 nanowires. 44,45 Again, hydrothermally grown Co 3 O 4 nanowires on Co 3 O 4 nanosheets demonstrated promising electrochemical properties with a very high specific capacitance of 2053.1 Fg À1 at 1 Ag À1 . 46 Xu et al reported the performance of Co 3 O 4 nanotubes as a supercapacitor material with a specific capacitance value of 574 Fg À1 , when recorded at a current density value of 0.1 Ag À1 .…”

Section: Cobalt Oxidesmentioning

confidence: 99%

An overview on the use of metal vanadium oxides and vanadates in supercapacitors and rechargeable batteries

Banerjee

Dutta

2021

Intl J of Energy Research

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Summary Recent increase in the growth of devices that store energy, keeping in mind the scarcity of fossil fuels, has facilitated in focusing our attention on rechargeable batteries and supercapacitors. In this regard, the metal vanadium oxides and vanadates have emerged as a promising electrode material. These materials enjoy the possession of high theoretical capacitance, coupled with the existence of multiple redox states, which help in decreasing the activation energy for redox reactions. A detailed investigation and analyses regarding the influence of morphology, which gets formed at the time of synthesis of these materials, on the electrochemical characteristics of the electrode has been presented here. In addition, the prospects and challenges associated with the commercialization of metal vanadium oxides and vanadates have also been discussed.

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“…A variety of Co3O4 nan materials have been synthesized, such as nanowires [81], nanofibers [82], nanopartic [83,84], and nanosheets [85]. Yue and co-workers [86] used a simple and environmenta [72] Copyright 2019 Elsevier. FE-SEM, field emission scanning electron microscopy.…”

Section: Co3o4 Nanomaterialsmentioning

confidence: 99%

“…A variety of Co 3 O 4 nanomaterials have been synthesized, such as nanowires [81], nanofibers [82], nanoparticles [83,84], and nanosheets [85]. Yue and co-workers [86] used a simple and environmentally friendly one-step hydrothermal and calcination method to prepare Co 3 O 4 /reduced graphene oxide (rGO) composites. Tiny Co 3 O 4 nanoparticles are dispersed on rGO flakes and a threedimensional structure is formed.…”

Section: Co 3 O 4 Nanomaterialsmentioning

confidence: 99%

Transition Metal Oxide Electrode Materials for Supercapacitors: A Review of Recent Developments

et al. 2021

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In the past decades, the energy consumption of nonrenewable fossil fuels has been increasing, which severely threatens human life. Thus, it is very urgent to develop renewable and reliable energy storage devices with features of environmental harmlessness and low cost. High power density, excellent cycle stability, and a fast charge/discharge process make supercapacitors a promising energy device. However, the energy density of supercapacitors is still less than that of ordinary batteries. As is known to all, the electrochemical performance of supercapacitors is largely dependent on electrode materials. In this review, we firstly introduced six typical transition metal oxides (TMOs) for supercapacitor electrodes, including RuO2, Co3O4, MnO2, ZnO, XCo2O4 (X = Mn, Cu, Ni), and AMoO4 (A = Co, Mn, Ni, Zn). Secondly, the problems of these TMOs in practical application are presented and the corresponding feasible solutions are clarified. Then, we summarize the latest developments of the six TMOs for supercapacitor electrodes. Finally, we discuss the developing trend of supercapacitors and give some recommendations for the future of supercapacitors.

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Synthesis of Co3O4/reduced graphene oxide by one step-hydrothermal and calcination method for high-performance supercapacitors

Cited by 29 publications

References 45 publications

Spinel CoFe2O4 Nanoflakes: A Path to Enhance Energy Generation and Environmental Remediation Potential of Waste-Derived rGO

Spinel CoFe2O4 Nanoflakes: A Path to Enhance Energy Generation and Environmental Remediation Potential of Waste-Derived rGO

An overview on the use of metal vanadium oxides and vanadates in supercapacitors and rechargeable batteries

Transition Metal Oxide Electrode Materials for Supercapacitors: A Review of Recent Developments

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