Fig. 1: Structure and characterizations of TQBQ-COF materials. | Nature Communications

Fig. 1: Structure and characterizations of TQBQ-COF materials.

From: Nitrogen-rich covalent organic frameworks with multiple carbonyls for high-performance sodium batteries

Fig. 1

a The chemical structure and possible electrochemical redox mechanism of TQBQ-COF with a theoretical capacity of 515 mAh g−1. b Top and side views of the schematic AB stacking model of TQBQ-COF layers with a packing distance of 3.07 Å. c PXRD pattern and the simulated AB/AB' stacking models of TQBQ-COF powder. d High-resolution TEM image of TQBQ-COF with a multilayer stacking space of ~0.30 nm. Scale bar, 5 nm. e SAED pattern of (002), (201), and (600) facets of TQBQ-COF from d. Scale bar, 5 nm−1.

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