Multilayer structure covalent organic frameworks (COFs) linking by double functional groups for advanced K+ batteries

[Display omitted] Covalent organic frameworks (COFs) are regarded as the potential and promising anode materials for potassium ion batteries (PIBs) on account of their robust and porous crystalline structure. In this work, multilayer structural COF connected by double functional groups, including im...

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Bibliographic Details
Published in:Journal of colloid and interface science 2023-06, Vol.639, p.7-13
Main Authors: Su, Zhihao, Huang, Jionghao, Wang, Runhao, Zhang, Yi, Zeng, Lingxing, Zhang, Yufei, Fan, Haosen
Format: Article
Language:English
Subjects:
Anode material
Covalent organic frameworks
Double functional groups
Multilayer structure
Potassium ion battery
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Summary:[Display omitted] Covalent organic frameworks (COFs) are regarded as the potential and promising anode materials for potassium ion batteries (PIBs) on account of their robust and porous crystalline structure. In this work, multilayer structural COF connected by double functional groups, including imine and amidogent through a simple solvothermalprocess, have been successfully synthesized. The multilayer structure of COF can provide fast charge transfer and combine the merits of imine (the restraint of irreversible dissolution) and amidogent (the supply of more active sites). It presents superior potassium storage performance, including the high reversible capacity of 229.5 mAh g−1 at 0.2 A g−1 and outstanding cycling stability of 106.1 mAh g−1 at the high current density of 5.0 A g−1 after 2000 cycles, which is superior to the individual COF. The structural advantages of the covalent organic framework linking by double functional groups (d-COF) can develop a new road for that COF anode material for PIBs in further research.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2023.02.012