Supercapacitor performance of 3D-graphene/MnO2 foam synthesized via the combination of chemical vapor deposition with hydrothermal method

Gao, Yanli; Gao, Zhao-Yang; Ma, Jingwen; Tong, Xiaofeng; Sun, Haibin; Wang, Jinan

doi:10.1063/5.0018708

Cited by 36 publications

(15 citation statements)

References 26 publications

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“…3 c. The C sp values of MnO x /C-rGO, MnO x /S-rGO, and MnO x at a high current density of 5 A g −1 are 196, 43.0, and 20.0 F g −1 , respectively. From Table 1 , it can be observed that the prepared MnO x /C-rGO composite shows higher C sp than previously reported MnO 2 -based composites [ 33 , 57 – 63 ].…”

Section: Resultsmentioning

confidence: 70%

“…3D graphene/MnO 2 composite has been successfully synthesized by combining chemical vapor deposition (CVD) and hydrothermal methods. This composite had a C sp of 333 F g −1 at 0.2 A g −1 [ 33 ]. Biomass-derived N-doped 3D graphene@MnO 2 (N-G@MnO 2 ) composite was previously prepared by CVD method and it displayed a high C sp of 411.5 F g −1 at 0.5 A g −1 [ 34 ].…”

Section: Introductionmentioning

confidence: 99%

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Boosting capacitive performance of manganese oxide nanorods by decorating with three-dimensional crushed graphene

Reaz

Saha²,

Roy

et al. 2022

Nano Convergence

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This work reports the rational design of MnOx nanorods on 3D crushed reduced graphene oxide (MnOx/C-rGO) by chemical reduction of Ni-incorporated graphene oxide (GO) followed by chemical etching to remove Ni. The resulting MnOx/C-rGO composite synergistically integrates the electronic properties and geometry structure of MnOx and 3D C-rGO. As a result, MnOx/C-rGO shows a significantly higher specific capacitance (Csp) of 863 F g−1 than MnOx/2D graphene sheets (MnOx/S-rGO) (373 F g−1) and MnOx (200 F g−1) at a current density of 0.2 A g−1. Furthermore, when assembled into symmetric supercapacitors, the MnOx/C-rGO-based device delivers a higher Csp (288 F g−1) than MnOx/S-rGO-based device (75 F g−1) at a current density of 0.3 A g−1. The superior capacitive performance of the MnOx/C-rGO-based symmetric device is attributed to the enlarged accessible surface, reduced lamellar stacking of graphene, and improved ionic transport provided by the 3D architecture of MnOx/C-rGO. In addition, the MnOx/C-rGO-based device exhibits an energy density of 23 Wh kg−1 at a power density of 113 Wkg−1, and long-term cycling stability, demonstrating its promising potential for practical application. Graphical Abstract

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Section: Resultsmentioning

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Boosting capacitive performance of manganese oxide nanorods by decorating with three-dimensional crushed graphene

Reaz

Saha²,

Roy

et al. 2022

Nano Convergence

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“…A high energy density of 51.2 W h kg −1 is obtained at 24.42 W h cm −2 and the maximum power density is 0.4 kW kg −1 (200 W cm −2 ). 3D-graphene/MnO 2 foam composite [ 120 ] was prepared by a combination of the CVD and hydrothermal method. The study shows that 3D-graphene/MnO 2 composite electrodes in the absence of carbon black have a high specific capacitance of 333.4 F g −1 at 0.2 A g −1 and excellent cycling stability.…”

Section: Tmos-based Electrode Materialsmentioning

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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“…Manganese oxide-graphene composite is the most studied electrode material for supercapacitor devices among metal oxides [13][14][15]. The charge storage mechanism of a MnO2 electrode involves a transition in manganese (Mn) oxidation state from III to IV.…”

Section: Graphene-manganese Oxide Nanocompositesmentioning

confidence: 99%

“…For producing highly efficient graphene/metal oxide-based hybrid supercapacitors, Wang et al [15] described in situ synthesis of 3D-graphene/MnO2 foam composite using a combination of chemical vapour deposition and hydrothermal process. High crystallinity and low contact resistance were observed during in situ conformal growth of 3D-graphene/MnO 2 composites.…”

Section: Graphene-manganese Oxide Nanocompositesmentioning

confidence: 99%

Graphene-Based Materials for Supercapacitor

Akhtar¹

2022

Supercapacitors for the Next Generation

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Graphene, a one-atomic-thick film of two-dimensional nanostructure, has piqued the attention of researchers due to its superior electrical conductivity, large surface area, good chemical stability, and excellent mechanical behaviour. These extraordinary properties make graphene an appropriate contender for energy storage applications. However, the agglomeration and re-stacking of graphene layers due to the enormous interlayer van der Waals attractions have severely hampered the performance of supercapacitors. Several strategies have been introduced to overcome the limitations and established graphene as an ideal candidate for supercapacitor. The combination of conducting polymer (CP) or metal oxide (MO) with graphene as electrode material is expected to boost the performance of supercapacitors. Recent reports on various CP/graphene composites and MO/graphene composites as supercapacitor electrode materials are summarised in this chapter, with a focus on the two basic supercapacitor mechanisms (EDLCs and pseudocapacitors).

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Supercapacitor performance of 3D-graphene/MnO2 foam synthesized via the combination of chemical vapor deposition with hydrothermal method

Cited by 36 publications

References 26 publications

Boosting capacitive performance of manganese oxide nanorods by decorating with three-dimensional crushed graphene

Boosting capacitive performance of manganese oxide nanorods by decorating with three-dimensional crushed graphene

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

Graphene-Based Materials for Supercapacitor

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