Conductive Metal–Organic Frameworks for Supercapacitors

Advanced Materials, Год журнала: 2022, Номер 34(52)

Опубликована: Март 31, 2022

Abstract As a class of porous materials with crystal lattices, metal–organic frameworks (MOFs), featuring outstanding specific surface area, tunable functionality, and versatile structures, have attracted huge attention in the past two decades. Since first conductive MOF is successfully synthesized 2009, considerable progress has been achieved for development MOFs, allowing their use diverse applications electrochemical energy storage. Among those applications, supercapacitors received great interest because high power density, fast charging ability, excellent cycling stability. Here, efforts hitherto devoted to synthesis design MOFs auspicious capacitive performance are summarized. Using as unique platform medium, electronic molecular aspects storage mechanism electrodes discussed, highlighting advantages limitations inspire new ideas supercapacitors.

Язык: Английский

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Metal-organic-framework-based materials as platforms for energy applications

Chem, Год журнала: 2023, Номер 10(1), С. 86 - 133

Опубликована: Окт. 10, 2023

Язык: Английский

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Multiple Accessible Redox-Active Sites in a Robust Covalent Organic Framework for High-Performance Potassium Storage

Journal of the American Chemical Society, Год журнала: 2023, Номер 145(9), С. 5105 - 5113

Опубликована: Фев. 16, 2023

Covalent organic framework (COF) materials with porous character and robust structure have significant applied implications for K-ion battery (KIB) anodes, but they are limited by the low reversible capacity inferior rate capability. Here, based on theoretical calculations, we identified that a bulk COF featuring numerous pyrazines carbonyls in π-conjugated periodic skeleton could provide multiple accessible redox-active sites high-performance potassium storage. Its surface-dominated storage mechanism enabled fast stable of K-ions. insolubility electrolytes small volumetric change after potassiation ensured electrode cycling. As KIB anode, this demonstrated an unprecedentedly outstanding combination (423 mAh g-1 at 0.1 C), capability (185 10 cyclability. The simulation comprehensive characterizations confirmed active contributed C═O, C═N, cation-π effect.

Язык: Английский

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The emerging aqueous zinc-organic battery

Coordination Chemistry Reviews, Год журнала: 2022, Номер 472, С. 214772 - 214772

Опубликована: Авг. 19, 2022

Язык: Английский

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Recent Progress of Advanced Conductive Metal–Organic Frameworks: Precise Synthesis, Electrochemical Energy Storage Applications, and Future Challenges

Small, Год журнала: 2022, Номер 18(44)

Опубликована: Сен. 1, 2022

Metal-organic frameworks (MOFs) with diverse composition, tunable structure, and unique physicochemical properties have emerged as promising materials in various fields. The pore abundant active sites, ultrahigh specific surface area can facilitate mass transport provide outstanding capacity, making MOFs an ideal material for electrochemical energy storage conversion. However, the poor electrical conductivity of pristine severely limits their applications electrochemistry. Developing conductive has proved to be effective solution this problem. This review focuses on design synthesis MOF composites judiciously chosen conducting materials, MOFs, assembly methods, well preparation intrinsically based building 2D π-conjugated structures, introducing mixed-valence metal ions/redox-active ligands, designing π-π stacked pathways, constructing infinite metal-sulfur chains (-M-S-)∞ . Furthermore, recent progress challenges conversion (supercapacitors, Li-ion batteries, Li-S water splitting) are summarized.

Язык: Английский

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A Triptycene‐Based 2D MOF with Vertically Extended Structure for Improving the Electrocatalytic Performance of CO₂ to Methane

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(11)

Опубликована: Янв. 24, 2023

Two-dimensional conductive metal-organic frameworks (2D-c-MOFs) have attracted extensive attention owing to their unique structures and physical-chemical properties. However, the planarly extended structure of 2D-c-MOFs usually limited accessibility active sites. Herein, we designed a triptycene-based 2D vertically MOF (2D-vc-MOF) by coordinating 2,3,6,7,14,15-hexahydroxyltriptycene (HHTC) with Cu2+ . The 2D-vc-MOF(Cu) possesses weak interlayer interaction, which leads facile exfoliation nanosheet. Compared classical structures, exhibits 100 % increased catalytic activity in terms turnover number two-fold selectivity. Density functional theory (DFT) calculations further revealed that higher originated from lower energy barriers during CO2 reduction reaction process.

Язык: Английский

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Strategies to Improve Electrical Conductivity in Metal–Organic Frameworks: A Comparative Study

Crystal Growth & Design, Год журнала: 2024, Номер 24(5), С. 2235 - 2265

Опубликована: Фев. 26, 2024

Metal-organic frameworks (MOFs), formed by the combination of both inorganic and organic components, have attracted special attention for their tunable porous structures, chemical functional diversities, enormous applications in gas storage, catalysis, sensing, etc. Recently, electronic MOFs like electrocatalysis, supercapacitors, batteries, electrochemical etc., become a major research topic MOF chemistry. However, low electrical conductivity most represents handicap development these emerging applications. To overcome limitations, different strategies been developed to enhance implementation devices. In this review, we outline all employed increase conduction intrinsically (framework-modulated) extrinsically (guests-modulated) conducting MOFs.

Язык: Английский

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Manipulation of π-aromatic conjugation in two-dimensional Sn-organic materials for efficient lithium storage

eScience, Год журнала: 2023, Номер 3(2), С. 100094 - 100094

Опубликована: Янв. 13, 2023

Sn-based materials are promising candidates for lithium storage but suffer generally from huge volume change during the (de)lithiation processes. Sn-organic with monodispersed Sn centers surrounded by active ligands can alleviate of anode based on reversible However, structural factors governing kinetics and utilization efficiency sites not well understood to date. Herein, we report three two-dimensional enhanced performance manipulation π-aromatic conjugation ligands. The increasing plays a key role in promoting efficient storage, expansion reaction is suppressed these materials. This work reveals that ligand crucial improving metal-organic minimised expansion.

Язык: Английский

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Stabilizing Redox‐Active Hexaazatriphenylene in a 2D Conductive Metal–Organic Framework for Improved Lithium Storage Performance

Advanced Functional Materials, Год журнала: 2023, Номер 33(21)

Опубликована: Март 10, 2023

Abstract Organic redox‐active materials are promising electrode candidates for lithium‐ion batteries by virtue of their designable structure and cost‐effectiveness. However, poor electrical conductivity high solubility in organic electrolytes limit the device's performance practical applications. Herein, π‐conjugated nitrogen‐containing heteroaromatic molecule hexaazatriphenylene (HATN) is strategically embedded with centers skeleton a Cu‐based 2D conductive metal–organic framework (2D c ‐MOF) to optimize lithium (Li) storage electrodes, which delivers improved specific capacity (763 mAh g −1 at 300 mA ), long‐term cycling stability (≈90% retention after 600 cycles excellent rate performance. The correlation experimental computational results confirms that this Li derives from maximum number active sites (CN HATN unit CO CuO 4 unit), favorable conductivity, efficient mass transfer channels. This strategy integrating multiple moieties into ‐MOF opens up new avenue design high‐performance materials.

Язык: Английский

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Conductive Metal–Organic Framework with Superior Redox Activity as a Stable High-Capacity Anode for High-Temperature K-Ion Batteries

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(10), С. 6753 - 6762

Опубликована: Фев. 27, 2024

High-temperature rechargeable batteries are essential for energy storage in elevated-temperature situations. Due to the resource abundance of potassium, high-temperature K-ion drawing increasing research interest. However, raising working temperature would aggravate chemical and mechanical instability KIB anode, resulting very fast capacity fading, especially when high is pursued. Here, we demonstrated that a porous conductive metal–organic framework (MOF), which constructed by N-rich aromatic molecules CuO4 units via π–d conjugation, could provide multiple accessible redox-active sites promised robust structure stability efficient potassium at temperatures. Even 60 °C, this MOF anode deliver initial (455 mAh g–1), impressive rate, extraordinary cyclability (96.7% retention 1600 cycles), much better than those reported anodes. The mechanistic study revealed C═N groups contributed abundant sites; synergistic effect conjugated character reticular architecture facilitated K+/e– transport ensured an insoluble electrode with small volume deformation, thus achieving stable high-capacity storage.

Язык: Английский

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