A bipolar-type covalent organic framework on carbon nanotubes with enhanced density of redox-active sites for high-performance lithium-ion batteries

Xu, Qingmei; Liu, Zhixin; Jin, Yucheng; Yang, Xiya; Sun, Tingting; Zheng, Tianyu; Li, Ning; Wang, Yuhui; Li, Tongxuan; Wang, Kang; Jiang, Jianzhuang

doi:10.1039/d4ee00520a

Energy Environ. Sci.

2024

DOI: 10.1039/d4ee00520a

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A bipolar-type covalent organic framework on carbon nanotubes with enhanced density of redox-active sites for high-performance lithium-ion batteries

Qingmei Xu,

Zhixin Liu,

Yucheng Jin

et al.

Abstract: A COF has been successfully fabricated onto carbon nanotubes as a cathode in LIBs with a high energy density of 737.5 W h g−1, representing the highest one among the thus far reported LIB cathodes.

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Cited by 9 publications

References 56 publications

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High‐Potential and Stable Organic Cathode for Rechargeable Batteries with Fast‐Charging and Wide‐Temperature Adaptability

Wang,

Liu,

Zhou

et al. 2024

Angewandte Chemie

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Organic carbonyl compounds have been recognized as promising electrodes due to multiple active sites, abundant element resources and flexible structural designability, while their practical applications are still hindered by the easy solubility and low discharge potential. Herein, a novel bipolar polymer composite (TAC) was well‐designed by grafting p‐type triphenylamine units onto n‐type anthraquinone to form an extended π‐conjugated structure and in‐situ growing on carbon nanotubes, which was proved not only with higher discharge potential but also effectively suppress the dissolution issues. Moreover, TAC combined the advantages of different active sites and behaved a dual‐ion storage mechanism. Benefitting from the in‐situ polymerization process, TAC with tube‐type core‐shell structure exhibited enhanced electron transport and improved utilization of active sites, resulting in high capacity (193 mAh g‐1), outstanding rate performance (fast charging within 17 s), long‐term stability (a high capacity retention of 87% after 1000 cycles) and high mass loading (10 mg cm‐2). Additionally, TAC can well adapt to the temperature change, outputting a capacity of 72 mAh g‐1 at ‐60 °C and 165 mAh g‐1 at 80 °C. Such versatile polymer structure inspires the design of high performance organic materials for rechargeable batteries to satisfy high stability and wide temperature operations.

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High‐Potential and Stable Organic Cathode for Rechargeable Batteries with Fast‐Charging and Wide‐Temperature Adaptability

Wang,

Liu,

Zhou

et al. 2024

Angewandte Chemie

View full text Add to dashboard Cite

show abstract

High‐Potential and Stable Organic Cathode for Rechargeable Batteries with Fast‐Charging and Wide‐Temperature Adaptability

Wang,

Liu,

Zhou

et al. 2024

Angew Chem Int Ed

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Covalent Organic Framework Controls the Aggregation of Metal Porphyrins for Enhanced Photocatalytic H₂ Evolution

Han,

Jin,

Yang

et al. 2024

Chemistry An Asian Journal

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Although different post modifications of covalent organic frameworks (COFs) have been developed for achieving hierarchical nanostructures and improved photocatalytic performance, the co‐assemblies of COFs with small organic molecules were still rarely studied. Herein, COF/porphyrin composites, which were fabricated at room temperature, reveal that COFs surface can modulate the aggregation of metal porphyrins, which subsequently enhance the photocatalytic properties of COFs assemblies. Thus, the surface of COFs was decorated by porphyrins aggregations with varied thickness, dependent on the metal ions of porphyrins.Ni(II) meso‐Tetra (4‐carboxyphenyl) porphine (NiTCPP) formed discontinuous monolayer covering on COFs surface, while Pt(II) meso‐Tetra (4‐carboxyphenyl) porphine (PtTCPP) or Co(II) meso‐Tetra (4‐carboxyphenyl) porphine (CoTCPP) aggregated into multilayer coverage. Notably, even though NiTCPP did not show any advantages in terms of light absorption or HOMO/LUMO energy levels, COF/NiTCPP with the lowest porphyrin loading still exhibited the highest photocatalytic H2 evolution (29.71 mmol g−1 h−1), which is 2.5 times higher than that of COF/PtTCPP or COF/CoTCPP. These results open new possibilities for making highly efficient photocatalysts upon the co‐assemblies of COFs with small organic molecules.

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A bipolar-type covalent organic framework on carbon nanotubes with enhanced density of redox-active sites for high-performance lithium-ion batteries

Abstract: A COF has been successfully fabricated onto carbon nanotubes as a cathode in LIBs with a high energy density of 737.5 W h g−1, representing the highest one among the thus far reported LIB cathodes.

Cited by 9 publications

References 56 publications

High‐Potential and Stable Organic Cathode for Rechargeable Batteries with Fast‐Charging and Wide‐Temperature Adaptability

High‐Potential and Stable Organic Cathode for Rechargeable Batteries with Fast‐Charging and Wide‐Temperature Adaptability

High‐Potential and Stable Organic Cathode for Rechargeable Batteries with Fast‐Charging and Wide‐Temperature Adaptability

Covalent Organic Framework Controls the Aggregation of Metal Porphyrins for Enhanced Photocatalytic H₂ Evolution

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A bipolar-type covalent organic framework on carbon nanotubes with enhanced density of redox-active sites for high-performance lithium-ion batteries

Abstract: A COF has been successfully fabricated onto carbon nanotubes as a cathode in LIBs with a high energy density of 737.5 W h g−1, representing the highest one among the thus far reported LIB cathodes.

Cited by 9 publications

References 56 publications

High‐Potential and Stable Organic Cathode for Rechargeable Batteries with Fast‐Charging and Wide‐Temperature Adaptability

High‐Potential and Stable Organic Cathode for Rechargeable Batteries with Fast‐Charging and Wide‐Temperature Adaptability

High‐Potential and Stable Organic Cathode for Rechargeable Batteries with Fast‐Charging and Wide‐Temperature Adaptability

Covalent Organic Framework Controls the Aggregation of Metal Porphyrins for Enhanced Photocatalytic H2 Evolution

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Product

Resources

About

Covalent Organic Framework Controls the Aggregation of Metal Porphyrins for Enhanced Photocatalytic H₂ Evolution