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High‐Lithium‐Affinity Chemically Exfoliated 2D Covalent Organic Frameworks
Thin Layered Organic Materials with Strong Ability to Capture Lithium
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Abstract
The exfoliated TFPB-COF demonstrates large reversible capacities of 1359 and 968 mAh g after 300 cycles.
- A new 2D covalent organic framework (COF) named TFPB-COF is designed with six unsaturated benzene rings per repeating unit.
- Ordered mesoporous pores of approximately 2.1 nm are present in the TFPB-COF structure.
- A chemical stripping strategy is used to create exfoliated few-layered COF nanosheets (E-TFPB-COF), which prevents restacking through in situ formed MnO nanoparticles.
- The exfoliated TFPB-COF features new active lithium storage sites that improve ion and electron movement.
- The E-TFPB-COF and E-TFPB-COF/MnO electrodes show enhanced performance compared to bulk TFPB-COF, indicating potential for lithium-ion battery applications.
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