Hierarchical porous covalent organic framework/graphene aerogel electrode for high-performance supercapacitors

An, Ning; Guo, Zhen; Jiao, Xin; He, Yuanyuan; Xie, Kefeng; Sun, Daming; Dong, Xiu‐Yan; Hu, Zhongai

doi:10.1039/d1ta04313g

Cited by 81 publications

(57 citation statements)

References 65 publications

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“…A standard three-electrode configuration was used throughout this study. Working electrode was prepared by the dropping method. − Briefly, 5 mg of as-prepared carbonized LNU solid was dispersed in 1 mL of 0.05 wt % Nafion solution by ultrasonification for 30 min. The modified glassy carbon electrode was made by dropping 25 μL (0.125 mg) of the dispersion on glassy carbon (GC: 3 mm diameter) and drying the glassy carbon at 60 °C overnight.…”

Section: Methodsmentioning

confidence: 99%

Dimensionality Control of 1D Coupling Reaction for the Facile Preparation of Porous Carbon Nanofibers

Yan

Cui

et al. 2021

Inorg. Chem.

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Porous carbon nanofibers with unique hierarchical structures have great potential in many fields, including heterogeneous catalysis, optoelectronics, and sensing. However, several preparation issues, such as additional templates, complicated processes, and harsh conditions, seriously hamper their widespread use. Here, we control the Sonogashira coupling reaction of linear building monomers1,4-dibromaphthalene and 1,4-ethylbenzeneat the molecular level. Due to the occurrence of branching chain reaction (side reaction), 1D oligomer expands the growth orientation in the plane direction, forming a curled 1D fiber polymer. After thermaldriven skeleton engineering, porous carbon nanofibers were obtained with hierarchical channels of macro-(150 nm), meso-(5.2 nm), and microcavities (0.5 and 1.3 nm). The integration of macro-/meso-/ microporous structure reveals a fast and sufficient interaction with electrolyte molecules, facilitating the construction of high-performance electrical devices. Our strategy, using a side reaction to achieve the dimensionality control of 1D copolymerization, paves a new way for the facile preparation of porous carbon nanofibers.

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Section: Methodsmentioning

confidence: 99%

Dimensionality Control of 1D Coupling Reaction for the Facile Preparation of Porous Carbon Nanofibers

Yan

Cui

et al. 2021

Inorg. Chem.

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“…Synthesizing hybrid electrodes with highly conductive nanocarbons such as CNT and graphene is another promising solution to mitigate the poor electric conductivity of COF electrodes and brings additional benefits such as enhanced surface area, hierarchal porosity by in-plane cavities, and controlled synthesis of few-layer COFs. [94][95][96][97][98][99][100][101] For instance, Sun et al synthesized a highly crystalline COF with 4,4 0 ,4 00 -(1,3,5-triazine-2,4,6-triyl) trianiline (TTA) with 2,5-dihydroxyterepthaldehyde (DHTA) on amino-functionalized multi-walled CNT (NH 2 -f-MWCNT) via in situ polymerization method (Figure 8A). 94 Owing to the desirable combination of high crystallinity, surface area, chemical stability, and electric conductivity, the combination of conductive MWCNTs and crystalline porous COF TTAÀDHTA electrode showed superior electrochemical performance (127.5 F g À1 at 0.4 A g À1 ) compared to either of its components.…”

Section: Composite Electrodes With Conductive Substratesmentioning

confidence: 99%

Section: Supercapacitorsmentioning

confidence: 99%

Covalent organic frameworks: Design and applications in electrochemical energy storage devices

Jin

Allam

Jang

et al. 2022

InfoMat

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As an emerging class of crystalline organic material, covalent organic frameworks (COFs) possess uniform porosity, versatile functionality, and precise control over designated structures. Aside from the favorable charge and mass transport pathways offered by the porous framework, COFs can also exhibit designed reversible redox activity. In the past few years, their potential has attracted a great deal of attention for charge storage and transport applications in various electrochemical energy storage devices, and numerous design strategies have been proposed to enhance the corresponding electrochemical properties. This review summarizes the working principle and synthesis methods of COFs and discusses significant findings for supercapacitors and various rechargeable battery systems, emphasizing the representative design strategies and their underlying relationship with electrochemical performances. In addition, key advances achieved by computations are highlighted along with the challenges and prospects in this field.

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“…Notably, these peaks are gradually declined and almost disappeared during the discharging process (from À 0.1 to À 0.9 V vs. Ag/AgCl), then recovered in the following charging process (from À 0.9 to À 0.1 V vs. Ag/AgCl), indicating the complete reversible redox reaction on the C=O units. The maximal usage of the active C=O groups of COFs for redox reaction can be ascribed to the heterostructure of COF@MXene-15 formed by the in-situ covalent bond between AQ-COF and MXene, [24,25,29] which can lead to larger capacitance. With the introduction and effective combination of MXene nanosheets, the improved conductivity and the high specific surface area with optimized porous structure can offer sufficient ion/charge adsorption sites and ensure the rapid transmission of ions, enabling the promoted redox activation of carbonyl groups (C=O) of AQ-COF in COF@MXene-15 heterostructure, further improving its electrochemical properties.…”

Section: Specimens S Betmentioning

confidence: 99%

“…[24] Nevertheless, in order to activate more pseudocapacitive performance of COF related electrodes, it is necessary to solve the problems of poor conductivity and inaccessible redox active sites for COFs. [25] Besides directly mixing with conductive polymers, [26] carbon nanotubes [27] and graphene, [28] alternatively, COFs can also be deposited on a conductive substrate to improve the conductivity and promote more exposed active reaction sites. [29] However, the reported formation of such composites mainly relies on the non-covalent bond between COFs and conductive additives (usually carbonaceous materials), which limits the stability of these composites.…”

Section: Introductionmentioning

confidence: 99%

Covalent‐Induced Heterostructure of Covalent‐Organic Frameworks and MXene as Advanced Electrodes with Motivated Pseudocapacitance Performance

et al. 2022

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Heterostructures based on covalent organic frameworks (COFs) and conductive materials have attracted more attentions to effectively apply COF‐related materials for supercapacitor. Here, the as‐prepared amino‐modified Ti3C2 MXene nanosheets are adopted to support the in‐situ growth of anthraquinone‐based COFs (AQ‐COF) to fabricate the heterostructures of COFs uniformly dispersed on surface of MXene, based on the covalent interaction between terminal C=O groups of COFs and amino units of MXene. Besides, the morphology and porous structures of COF@MXene heterostructures are optimized by controlling the amounts of MXene nanosheets. Combining the superiority from the two‐dimensional structure with high conductivity of MXene and porous structure with abundant redox‐active groups inherited from AQ‐COF, the COF@MXene‐15 heterostructure electrode delivers large surface area with optimal porous structures, leading to the maximally‐activated C=O units for charge‐storage and capacitance‐controlled electrochemical kinetics. Improved specific capacitance (290 F g−1 at 0.5 A g−1) and rate capability can be achieved for the COF@MXene‐15 heterostructure as the electrode for supercapacitor in Na2SO4 electrolyte. It is the first time to report the heterostructure of COFs and MXene as the electrode for supercapacitor, and this work would promote further application of COFs and related materials for other energy‐storage systems.

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Hierarchical porous covalent organic framework/graphene aerogel electrode for high-performance supercapacitors

Abstract: Redox-active covalent organic frameworks (COFs) are an emerging class of energy storage materials due to their notably abundant active sites, well-defined channels and highly surface areas. However, their poor electrical...

Cited by 81 publications

References 65 publications

Dimensionality Control of 1D Coupling Reaction for the Facile Preparation of Porous Carbon Nanofibers

Dimensionality Control of 1D Coupling Reaction for the Facile Preparation of Porous Carbon Nanofibers

Covalent organic frameworks: Design and applications in electrochemical energy storage devices

Covalent‐Induced Heterostructure of Covalent‐Organic Frameworks and MXene as Advanced Electrodes with Motivated Pseudocapacitance Performance

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