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. 2024 Mar 19;121(13):e2315407121. doi: 10.1073/pnas.2315407121

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Copyright © 2024 the Author(s). Published by PNAS.

This article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND).

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Fig. 3. — HAADF-STEM images, electrochemical properties, and mechanism characterizations for LIBs. HAADF-STEM image and the corresponding EDS mapping images of (A) Fe-COF@CNT and (B) Ni-COF@CNT. Cycling performance at (C and D) 100 mA g^–1 and (E) 1,000 mA g^–1. Notes: The capacities were all calculated based on the total weight of the electrodes. (F) Ex situ XPS results of the C 1 s spectrum during lithiation and delithiation process. (G) Corresponding discharging and charging curves and (H) in situ FT-IR contour map for the Co-COF@CNT electrode.