Rational Design of Electrode Materials for Advanced Supercapacitors: From Lab Research to Commercialization

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(14)

Published: Jan. 18, 2023

Abstract Supercapacitors can harvest electrical energy from intermittent sources and transfer it quickly, but their specific must be raised if they are applied to efficiently power wearable flexible electronics, as well larger equipment. However, the remaining big gap between lab research practical applications seriously hinders further progress of advanced supercapacitors, especially for electrode materials. Consequently, a commercial/usable perspective, clear guideline commercialization is highly desired bringing supercapacitors basic into reality. This review focuses on key factors summarizes recent in field outlines perspectives future research. First, several storage mechanisms illustrated building better supercapacitors. Then, up‐to‐date achievements progresses smart methods toward high‐energy effective strategies commercial‐level mass‐loading high packing density electrodes summarized commented upon. Also, integrated systems application fields commercial also highlighted. Subsequently, directions presented here guide

Language: Английский

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Orthoquinone–Based Covalent Organic Frameworks with Ordered Channel Structures for Ultrahigh Performance Aqueous Zinc–Organic Batteries

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(12)

Published: Jan. 22, 2022

Elaborate molecular design on cathodes is of great importance for rechargeable aqueous zinc-organic batteries' performance elevation. Herein, we a novel orthoquinone-based covalent organic framework with an ordered channel structures (BT-PTO COF) cathode ultrahigh battery. The structure facilitates ions transfer and makes the COF follow redox pseudocapacitance mechanism. Thus, it delivers high reversible capacity 225 mAh g-1 at 0.1 A exceptional long-term cyclability (retention rate 98.0 % 5 (≈18 C) after 10 000 cycles). Moreover, co-insertion mechanism Zn2+ first followed by two H+ uncovered time. Significantly, this behaviour evolves to more insertion routes current density gives ultra-fast kinetics thus achieves unprecedented specific power 184 kW kg-1(COF) energy 92.4 Wh . Our work reports superior material zinc batteries provides idea future high-performance cathodes.

Language: Английский

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Covalent organic frameworks promoted single metal atom catalysis: Strategies and applications

Coordination Chemistry Reviews, Journal Year: 2021, Volume and Issue: 452, P. 214298 - 214298

Published: Nov. 9, 2021

Language: Английский

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Imine and imine-derived linkages in two-dimensional covalent organic frameworks

Nature Reviews Chemistry, Journal Year: 2022, Volume and Issue: 6(12), P. 881 - 898

Published: Nov. 11, 2022

Language: Английский

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Covalent Organic Framework Based Functional Materials: Important Catalysts for Efficient CO₂Utilization

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(15)

Published: Jan. 21, 2022

As hot topics in the chemical conversion of CO2 , photo-/electrocatalytic reduction and use as a supporter for energy storage have shown great potential utilization . However, many obstacles still exist on road to realizing highly efficient conversion, such inefficient uptake/activation mass transport catalysts. Covalent organic frameworks (COFs), kind porous material, been widely explored catalysts owing their unique features. In particular, COF-based functional materials containing diverse active sites (such single metal sites, nanoparticles, oxides) offer storage. This Minireview discusses recent breakthroughs basic knowledge, mechanisms, pathways strategies that addition, challenges prospects are also introduced.

Language: Английский

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2D Conjugated Covalent Organic Frameworks: Defined Synthesis and Tailor-Made Functions

Accounts of Chemical Research, Journal Year: 2022, Volume and Issue: 55(6), P. 795 - 808

Published: Jan. 13, 2022

ConspectusCovalent organic frameworks (COFs) are an emerging class of crystalline porous polymers and have received tremendous attention research interest. COFs can be classified into two-dimensional (2D) three-dimensional (3D) analogues. Resembling the architectures graphene, 2D conjugated exhibited promising prospects in many fields, such as gas storage separation, heterogeneous catalysis, sensing, photocatalysis, environmental remediation, drug delivery, energy conversion, so forth. However, efficient structural design for high-throughput production remains challenging.In this Account, we summarize our recent contributions to design, synthesis, application exploration COFs. First, raised "two-in-one" strategy facile synthesis imine with good reproducibility solvent adaptability. Thanks elaborate molecular strategy, could easily modulate topology fabricate COF films. In addition, developed two approaches stabilize by using planar building blocks donor-acceptor structures. We also proposed a skeleton engineering electrode materials, through which redox-active orthoquinone moieties were stepwise-incorporated skeletons isostructural imine-linked This enabled systematic investigations on series analogous structures but different numbers active sites storage, provides platform unveil underlying structure-property relationships. recently new kind arylamine-linked The electroactive diphenylamine linkages endowed these extended conjugation improved stability, conferred excellent pseudocapacitive performance. Moreover, tailor-made sulfur-rich introduced that synthesized selective introduction polysulfide or sulfonyl groups used Li proton conduction. At end, key challenges toward practical applications their future suggested. hope Account will evoke inspirations innovative work field near future, especially some burgeoning interdisciplinary areas.

Language: Английский

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Boosting the Electrocatalytic Conversion of Nitrogen to Ammonia on Metal-Phthalocyanine-Based Two-Dimensional Conjugated Covalent Organic Frameworks

Journal of the American Chemical Society, Journal Year: 2021, Volume and Issue: 143(47), P. 19992 - 20000

Published: Nov. 16, 2021

The electrochemical N2 reduction reaction (NRR) under ambient conditions is attractive in replacing the current Haber-Bosch process toward sustainable ammonia production. Metal-heteroatom-doped carbon-rich materials have emerged as most promising NRR electrocatalysts. However, simultaneously boosting their activity and selectivity remains a grand challenge, while principle for precisely tailoring active sites has been elusive. Herein, we report first case of crystalline two-dimensional conjugated covalent organic frameworks (2D c-COFs) incorporated with M-N4-C centers novel, defined, effective catalysts, achieving enhanced electrocatalytic to ammonia. Such 2D c-COFs are synthesized based on metal-phthalocyanine (M = Fe, Co, Ni, Mn, Zn, Cu) pyrene units bonded by pyrazine linkages. Significantly, Fe-N4-C center exhibit higher yield rate (33.6 μg h-1 mgcat-1) Faradaic efficiency (FE, 31.9%) at -0.1 V vs reversible hydrogen electrode than those other centers, making them among best electrocatalysts (yield >30 mgcat-1 FE > 30%). In situ X-ray absorption spectroscopy, Raman spectroelectrochemistry, theoretical calculations unveil that act catalytic sites. They show unique electronic structure localized states Fermi level, allowing stronger interaction thus faster activation kinetics centers. Our work opens possibility developing metal-nitrogen-doped superior electrocatalyst provides an atomic understanding M-Nx-C designing high-performance catalysts.

Language: Английский

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Covalent Organic Framework for Rechargeable Batteries: Mechanisms and Properties of Ionic Conduction

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(20)

Published: April 10, 2022

Abstract Ionic conduction plays a critical role in the process of electrode reactions and charge transfer kinetics rechargeable battery. Covalent organic frameworks (COFs) have emerged as an exciting new class ionic conductors, made great progress terms their application batteries. The unique features COFs, such well‐defined directional channels, functional diversity, structural robustness, endow COF‐based conductors with low diffusion energy barrier excellent temperature tolerance, which are much superior to classic inorganic or polymer conductors. Here, comprehensive analysis summary ion‐conducting behavior presented, design principles for COFs emphasized. Moreover, systematic overview recent development serving electrodes, separators, solid electrolytes, artificial interphase materials diverse battery applications, metal‐ion batteries, lithium metal lithium–sulfur lithium–CO 2 zinc–air etc., is proposed. This review expected provide theoretical guidance novel kinds conductor bearing intrinsic framework structures boost further research enthusiasm

Language: Английский

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Ionic Covalent Organic Frameworks for Energy Devices

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(52)

Published: Oct. 8, 2021

Covalent organic frameworks (COFs) are a class of porous crystalline materials whose facile preparation, functionality, and modularity have led to their becoming powerful platforms for the development molecular devices in many fields (bio)engineering, such as energy storage, environmental remediation, drug delivery, catalysis. In particular, ionic COFs (iCOFs) highly useful constructing devices, functional groups can transport ions efficiently, nonlabile ordered all-covalent pore structures backbones provide ideal pathways long-term under harsh electrochemical conditions. Here, current research progress on use iCOFs specifically lithium-based batteries fuel cells, is reviewed terms iCOF backbone-design strategies, synthetic approaches, properties, engineering techniques, applications. categorized anionic or cationic COFs, how each these types lithium ions, protons, hydroxides illustrated. Finally, challenges future opportunities utilization described. This review will therefore serve reference state-of-the-art design application strategies focusing devices.

Language: Английский

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In Situ Growth of Covalent Organic Framework Nanosheets on Graphene as the Cathode for Long‐Life High‐Capacity Lithium‐Ion Batteries

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(37)

Published: July 29, 2022

The poor electronic and ionic conductivities of covalent organic frameworks (COFs) severely restrict the development COF-based electrodes for practical rechargeable batteries, therefore inspiring more research interest from direction both material synthesis technology. Herein, a dual-porous COF, USTB-6, with good crystallinity rich redox-active sites is conceived fabricated by polymerization 2,3,8,9,14,15-hexa(4-formylphenyl)diquinoxalino [2,3-a:2',3'-c]phenazine 2,7-diaminopyrene-4,5,9,10-tetraone. In particular, heterogeneous same starting materials in presence graphene affords uniformly dispersed COF nanosheets thickness 8.3 nm on conductive carbon substrate, effectively enhancing conductivity electrode. Such graphene-supported USTB-6 cathode when used lithium-ion battery exhibits specific capacity 285 mA h g-1 at current density 0.2 C excellent rate performance prominent 188 10 C. More importantly, 170 retained using after 6000 cycles charge discharge measurement 5

Language: Английский

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