High Utilization of Composite Magnesium Metal Anodes Enabled by a Magnesiophilic Coating

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High Utilization of Composite Magnesium Metal Anodes Enabled by a Magnesiophilic Coating
Title:
High Utilization of Composite Magnesium Metal Anodes Enabled by a Magnesiophilic Coating
Other Titles:
Nano Letters
Publication Date:
10 August 2022
Citation:
Li, Y., Yang, G., Sun, S., Zhang, C., Lim, C. Y. J., Wong, A. J. Y., Lieu, W. Y., Sofer, Z., Ng, M.-F., Liu, W., & Seh, Z. W. (2022). High Utilization of Composite Magnesium Metal Anodes Enabled by a Magnesiophilic Coating. Nano Letters, 22(16), 6808–6815. https://doi.org/10.1021/acs.nanolett.2c02829
Abstract:
Metallic magnesium is a promising high-capacity anode material for energy storage technologies beyond lithium-ion batteries. However, most reported Mg metal anodes are only cyclable under shallow cycling (≤1 mAh cm–2) and thus poor Mg utilization (<3%) conditions, significantly compromising their energy-dense characteristic. Herein, composite Mg metal anodes with high capacity utilization of 75% are achieved by coating magnesiophilic gold nanoparticles on copper foils for the first time. Benefiting from homogeneous ionic flux and uniform deposition morphology, the Mg-plated Au–Cu electrode exhibits high average Coulombic efficiency of 99.16% over 170 h cycling at 75% Mg utilization. Moreover, the full cell based on Mg-plated Au–Cu anode and Mo6S8 cathode achieves superior capacity retention of 80% after 300 cycles at a low negative/positive ratio of 1.33. This work provides a simple yet effective general strategy to enhance Mg utilization and reversibility, which can be extended to other metal anodes as well.
License type:
Publisher Copyright
Funding Info:
This research / project is supported by the National Research Foundation - NRF Fellowship
Grant Reference no. : NRF-NRFF2017-04

This research is supported by core funding from: SERC
Grant Reference no. : NA
Description:
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.nanolett.2c02829
ISSN:
1530-6992
1530-6984
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