Double‐Transition‐Metal MXene Films Promoting Deeply Rechargeable Magnesium Metal Batteries

Double‐Transition‐Metal MXene Films Promoting Deeply Rechargeable Magnesium Metal Batteries

Small Methods

10.1002/smtd.202201598

http://dx.doi.org/10.1002/smtd.202201598

Yuanjian Li, Wei Ying Lieu, Tanmay Ghosh, Lin Fu, Xiang Feng, Andrew Jun Yao Wong, Anupma Thakur, Brian C. Wyatt, Babak Anasori, Qianfan Zhang, Hui Ying Yang, Zhi Wei Seh

General Materials Science, General Chemistry

19 February 2023

Li, Y., Lieu, W. Y., Ghosh, T., Fu, L., Feng, X., Wong, A. J. Y., Thakur, A., Wyatt, B. C., Anasori, B., Zhang, Q., Yang, H. Y., & Seh, Z. W. (2023). Double‐Transition‐Metal MXene Films Promoting Deeply Rechargeable Magnesium Metal Batteries. Small Methods. Portico. https://doi.org/10.1002/smtd.202201598

Magnesium metal batteries are promising candidates for next-generation high-energy-density and low-cost energy storage systems. Their application, however, is precluded by infinite relative volume changes and inevitable side reactions of Mg metal anodes. These issues become more pronounced at large areal capacities that are required for practical batteries. Herein, for the first time, double-transition-metal MXene films are developed to promote deeply rechargeable magnesium metal batteries using Mo2Ti2C3 as a representative example. The freestanding Mo2Ti2C3 films, which are prepared using a simple vacuum filtration method, possess good electronic conductivity, unique surface chemistry, and high mechanical modulus. These superior electro-chemo-mechanical merits of Mo2Ti2C3 films help to accelerate electrons/ions transfer, suppress electrolyte decomposition and dead Mg formation, as well as maintain electrode structural integrity during long-term and large-capacity operation. As a result, the as-developed Mo2Ti2C3 films exhibit reversible Mg plating/stripping with high Coulombic efficiency of 99.3% at a record-high capacity of 15 mAh cm−2. This work not only sheds innovative insights into current collector design for deeply cyclable Mg metal anodes, but also paves the way for the application of double-transition-metal MXene materials in other alkali and alkaline earth metal batteries.

Publisher Copyright

This research is supported by core funding from: SERC
Grant Reference no. : NA

This research / project is supported by the Ministry of Education (MOE) - Academic Research Fund Tier 2
Grant Reference no. : MOE2019-T2-1-181

This is the peer reviewed version of the following article: Li, Y., Lieu, W. Y., Ghosh, T., Fu, L., Feng, X., Wong, A. J. Y., Thakur, A., Wyatt, B. C., Anasori, B., Zhang, Q., Yang, H. Y., & Seh, Z. W. (2023). Double‐Transition‐Metal MXene Films Promoting Deeply Rechargeable Magnesium Metal Batteries. Small Methods. Portico. https://doi.org/10.1002/smtd.202201598, which has been published in final form at doi.org/10.1002/smtd.202201598. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

https://oar.a-star.edu.sg/communities-collections/articles/19149

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Institute of Materials Research and Engineering