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Recently, three-dimensional (3D) conductive frameworks have been chosen as the host for composite lithium (Li) metal anode because of their exceptional electrical conductivity and remarkable thermal and electrochemical stability. However, Li tends to accumulate on the top of the 3D frameworks with homogenous lithiophilicity and Li dendrite still growth. This work firstly designed a bimetallic metal-organic framework (MOF) (CuMn-MOF) derived Cu2O and Mn3O4 nanoparticles decorated carbon cloth (CC) substrates (CC@Cu2O/Mn3O4) to fabricate a composite Li anode. Thanks to the synergistic effects of lithiophilic Cu2O and Mn3O4, the CC@Cu2O/Mn3O4@Li symmetrical cell can afford a prolonged cycling lifespan (1400 h) under an ultrahigh current density and areal capacity (6 mA·cm−2/6 mAh·cm−2). When coupled with the LiFePO4 (LFP) cathode, the LFP||CC@Cu2O/Mn3O4@Li full cell demonstrated a superior performance of 89.7 mAh·g−1 even at an extremely high current density (10 C). Furthermore, it can also be matched well with LiNi0.5Co0.2Mn0.3O2 (NCM523) cathode. Importantly, to explain the excellent performances of the CC@Cu2O/Mn3O4@Li composite anode, an intermittent model was also proposed. This study offers a novel model that can enhance our comprehension of the Li deposition behavior and pave the way to attain stable and safe Li metal anodes by employing bimetallic MOF-derived materials to construct 3D frameworks.

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Publication history
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Acknowledgements

Publication history

Received: 28 July 2023
Revised: 03 September 2023
Accepted: 11 September 2023
Published: 20 October 2023
Issue date: April 2024

Copyright

© Tsinghua University Press 2023

Acknowledgements

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Nos. 21701083 and 22279112), Fok Ying-Tong Education Foundation of China (No. 171064), and the Natural Science Foundation of Hebei Province (Nos. B2022203018 and B2018203297).

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