N-rich reduced graphene oxide film with cross-coupled porous networks as free-standing electrode for high performance supercapacitors

Xu, Yali; Huang, Cong; Hu, Aiping; Fan, Zefu; Chen, Chuansheng; Yang, Yujie; Tang, Qunli; Jiang, Changzhong; Chen, Xiaohua

doi:10.1016/j.apsusc.2021.150303

Cited by 11 publications

(9 citation statements)

References 48 publications

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“…This fabrication was only possible due to the restacking ability of reduced graphene oxide which occurs without the presences of binding agents, which formed a macroscopic assemble structure .i.e. graphene film around three dimensional (3D) NF structure [35,36]. This is not possible within other non-two dimensional carbon allotropes and carbon based nanocomposite material such as carbon nanotube, activated carbon and iron carbide [37][38][39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Low temperature thermally reduced graphene oxide directly on Ni-Foam using atmospheric pressure-chemical vapour deposition for high performance supercapacitor application

Maphiri

Bakhoum

Sarr

et al. 2022

Journal of Energy Storage

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Section: Introductionmentioning

confidence: 99%

Low temperature thermally reduced graphene oxide directly on Ni-Foam using atmospheric pressure-chemical vapour deposition for high performance supercapacitor application

Maphiri

Bakhoum

Sarr

et al. 2022

Journal of Energy Storage

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Section: Ice-templating Combined With Filtrationmentioning

confidence: 99%

“…Xu et al prepared N-rich holey rGO films (N-HRGO) via H 2 O 2 -assisted etching followed by modified vacuum filtration and freeze-casting. [91] The vertically arranged hierarchical porous structure of N-HRGO provided fast electrolyte ions/electrons transport, rich surface active sites, and effective stress buffering (Figure 12i-k). N-HRGO still maintained superior cycling stability and coulombic efficiency after 5000 cycles at 2 A g −1 (Figure 12l).…”

Section: Ice-templating Combined With Filtrationmentioning

confidence: 99%

Ice‐Templating: Integrative Ice Frozen Assembly to Tailor Pore Morphology of Energy Storage and Conversion Devices

Zhao

Lin

Zhang

et al. 2023

Adv Materials Technologies

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Ice-templating, also known as directional freezing or freeze-casting, features the tunability of microstructure, the wide applicability of functional nanomaterials, and the fabrication of multiscale well-controlled biomimetic materials. Recently, integrating ice-templating with other materials' processing technologies (such as, spraying, spinning, filtration, and hydrothermal), it has been investigated to tailor pore morphology of scaffolds for emerging applications. Such integration endows materials with various structures (cellular, dendritic, and lamellar) and dimensions (0D, 1D, 2D, and 3D), which opens up a new avenue for improving material properties and developing new materials. Herein, this review probes into the relationship of integrative ice frozen assembly with structure and describes the fundamental principles and synthesis strategies for preparing multi-scale materials with complex biomimetic structures via ice-templating. Focusing on ice crystal nucleation and growth, it summarizes the performance of ice-templating in constructing pore geometries. Additionally, the review analyzes in depth the correlation between microstructure and macromorphology of final scaffolds, highlighting the application of integrative ice frozen assembly in electrochemical energy storage and conversion, and prospects for future research directions for this field.

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“…The shape of the electrochemical cyclic voltammetry (CV) has been used to distinguish between different electrochemical systems, i.e., capacitive and faradic behaviour. Further electrochemical analysis, such as Trasatti's [13,14] and Dunn's [14] analysis, can be used to understand the electrode material storage mechanism. Trasatti's analysis relies on the assumption that diffusion and surface-controlled contributions are controlled by different kinetics, which respond differently as the scan rate increases.…”

Section: Introductionmentioning

confidence: 99%

“…Trasatti's analysis relies on the assumption that diffusion and surface-controlled contributions are controlled by different kinetics, which respond differently as the scan rate increases. Xu et al [14] used this analysis on the prepared nitrogen-rich holey graphene oxide film reduced at 200-400 • C under an Ar environment. The Trasatti analysis showed that for an optimum sample reduced at 300 • C, the capacitance contribution from the inner surface (pseudocapacitance) is almost 64.1% of the total capacitance.…”

Section: Introductionmentioning

confidence: 99%

Impact of Thermally Reducing Temperature on Graphene Oxide Thin Films and Microsupercapacitor Performance

et al. 2022

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In this work, a thermally reduced graphene oxide (TRGO) thin film on microscopic glass was prepared using spray coating and atmospheric pressure chemical vapour deposition. The structure of TRGO was analysed using X-ray diffraction (XRD) spectroscopy, scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDS), Fourier transform infrared (FTIR) spectroscopy, and ultraviolet–visible spectroscopy (UV-Vis) suggesting a decrease in oxygen functional groups (OFGs), leading to the restacking, change in colour, and transparency of the graphene sheets. Raman spectrum deconvolution detailed the film’s parameters, such as the crystallite size, degree of defect, degree of amorphousness, and type of defect. The electrochemical performance of the microsupercapacitor (µ-SC) showed a rectangular cyclic voltammetry shape, which was maintained at a high scan rate, revealing phenomenal electric double-layer capacitor (EDLC) behaviour. The power law and Trasatti’s analysis indicated that low-temperature TRGO µ-SC is dominated by diffusion-controlled behaviour, while higher temperature TRGO µ-SC is dominated by surface-controlled behaviour.

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N-rich reduced graphene oxide film with cross-coupled porous networks as free-standing electrode for high performance supercapacitors

Cited by 11 publications

References 48 publications

Low temperature thermally reduced graphene oxide directly on Ni-Foam using atmospheric pressure-chemical vapour deposition for high performance supercapacitor application

Low temperature thermally reduced graphene oxide directly on Ni-Foam using atmospheric pressure-chemical vapour deposition for high performance supercapacitor application

Ice‐Templating: Integrative Ice Frozen Assembly to Tailor Pore Morphology of Energy Storage and Conversion Devices

Impact of Thermally Reducing Temperature on Graphene Oxide Thin Films and Microsupercapacitor Performance

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