2D Graphene‐Based Macroscopic Assemblies for Micro‐Supercapacitors

Gao, Chunqing; Chen, Kaiyue; Wang, Ying; Qu, Liangti

doi:10.1002/cssc.201902707

Cited by 19 publications

(14 citation statements)

References 115 publications

(149 reference statements)

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“…In contrast to individual graphene nanosheets, macroscale graphene-based architectures with three-dimensional structures may be a better choice when used as support for MPc catalyst. The 3D structures can not only improves the dispersion of graphene and reduce the stack of graphene nanosheets, but also promotes the diffusion adsorption of the reactants and improves the accessibility of reactants to the active sites, which is also important to the heterogeneous catalyst [ 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Facile One-Step Fabrication of Phthalocyanine–Graphene–Bacterial–Cellulose Nanocomposite with Superior Catalytic Performance

Hong

Chen

2020

Nanomaterials

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It is generally accepted that the convenient fabrication of a metal phthalocyanine-based heterogeneous catalyst with superior catalytic activity is crucial for its application. Herein, a novel and versatile ultrasonic-assisted biosynthesis approach (conducting ultrasonic treatment during biosynthesis process) was tactfully adopted for the direct immobilization of a sulfonated cobalt phthalocyanine (PcS) catalyst onto a graphene–bacterial cellulose (GBC) substrate without any modification. The prepared phthalocyanine–graphene–bacterial–cellulose nanocomposite, PcS@GBC, was characterized by field emission scanning electron microscope (FESEM) and X-ray photoelectron spectroscopy (XPS). The catalytic activity of the PcS@GBC was evaluated based on its catalytic oxidation performance to dye solution, with H2O2 used as an oxidant. More than a 140% increase of dye removal percentage for the PcS@GBC heterogeneous catalyst was found compared with that of PcS. The unique hierarchical architecture of the GBC substrate and the strong interaction between PcS and graphene, which were verified experimentally by ultraviolet-visible light spectroscopy (UV-vis) and Fourier transform infrared spectroscopy (FT-IR) and theoretically by density functional theory (DFT) calculation, were synergistically responsible for the substantial enhancement of catalytic activity. The accelerated formation of the highly reactive hydroxyl radical (·OH) for PcS@GBC was directly evidenced by the electron paramagnetic resonance (EPR) spin-trapping technique. A possible catalytic oxidation mechanism for the PcS@GBC–H2O2 system was illustrated. This work provides a new insight into the design and construction of a highly reactive metal phthalocyanine-based catalyst, and the practical application of this functional nanomaterial in the field of environmental purification is also promising.

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Section: Introductionmentioning

confidence: 99%

Facile One-Step Fabrication of Phthalocyanine–Graphene–Bacterial–Cellulose Nanocomposite with Superior Catalytic Performance

Hong

Chen

2020

Nanomaterials

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“…The configuration designs are mainly classified into fiber/wire devices and in-plane interdigitated devices (shown in Figure 4). [112] In fiber type devices, each of the two electrodes is coated on conductive fibers/wires which serve as current collectors. They are arranged in a parallel or intertwined configuration, followed by an electrolyte layer, separating the two electrodes.…”

Section: Miniaturization and On-chip Architecturementioning

confidence: 99%

“…A photochemically reduced GO/TiO 2 nanoparticle hybrid film resulted in an interdigitated MSC. [119] The pattern was achieved [112] Copyright 2020, Wiley-VCH. C and C 0 are the measured and initial specific capacitance, respectively.…”

Section: Miniaturization and On-chip Architecturementioning

confidence: 99%

Graphene's Role in Emerging Trends of Capacitive Energy Storage

Wang

Muni

Strauß

et al. 2021

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Technological breakthroughs in energy storage are being driven by the development of next‐generation supercapacitors with favorable features besides high‐power density and cycling stability. In this innovation, graphene and its derived materials play an active role. Here, the research status of graphene supercapacitors is analyzed. Recent progress is outlined in graphene assembly, exfoliation, and processing techniques. In addition, electrochemical and electrical attributes that are increasingly valued in next‐generation supercapacitors are highlighted along with a summary of the latest research addressing chemical modification of graphene and its derivatives for future supercapacitors. The challenges and solutions discussed in the review hopefully will shed light on the commercialization of graphene and a broader genre of 2D materials in energy storage applications.

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“…Based on the dimension, G‐MSC can be classified into 1D (fiber configuration) and 2D and 3D (in‐planar configuration), according to the fabrication techniques. [ 105 ]…”

Section: Various Fabrication Techniques For Mscsmentioning

confidence: 99%

Recent Progress in Graphene‐Based Microsupercapacitors

et al. 2021

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The fast growing field of microsized electronic devices has urgent demand for next‐generation microscale, flexible, and lightweight energy conversion and storage devices. Among the various microdevices, microsupercapacitors (MSCs) are a promising energy storage device due to their fast rechargeability, better rate capability, long cycle life, and ultrahigh power density. The 2D graphene possesses a large surface area with flexibility, better conductivity, transparency, and high quantum capacitance that lead to an ideal energy storage material for the MSCs. Therefore, this review aims to summarize recent advances in graphene‐based MSCs. A particular emphasis is put on the various fabrication technologies for MSCs such as printing, laser, wet‐spin, and photolithography technique that are discussed elaborately. Moreover, an overview of the state‐of‐the‐art on graphene‐based electrode materials and its different composite with transition metal oxides, transition metal hydroxides, conducting polymers, transition metal chalcogenides, and MXene‐based electrode materials for MSCs are discussed and their electrochemical performances are summarized. Furthermore, this review concludes with perspectives and outlooks.

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2D Graphene‐Based Macroscopic Assemblies for Micro‐Supercapacitors

Cited by 19 publications

References 115 publications

Facile One-Step Fabrication of Phthalocyanine–Graphene–Bacterial–Cellulose Nanocomposite with Superior Catalytic Performance

Facile One-Step Fabrication of Phthalocyanine–Graphene–Bacterial–Cellulose Nanocomposite with Superior Catalytic Performance

Graphene's Role in Emerging Trends of Capacitive Energy Storage

Recent Progress in Graphene‐Based Microsupercapacitors

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