Self-Healable, High-Stability Anode for Rechargeable Magnesium Batteries Realized by Graphene-Confined Gallium Metal.
basic_science · Level V
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- Record sourced from PubMed, PMID 39177647.
- Also identified by DOI 10.1021/acs.nanolett.4c01638.
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Abstract
In this work, a self-healable, high-stability anode material for rechargeable magnesium batteries (RMBs) has been developed by introducing a core-shell structure of Ga confined by reduced graphene oxide (Ga@rGO). <i>Via</i> this Ga@rGO anode, a specific capacity of 150 mAh g<sup>-1</sup> at a current of 0.5 A g<sup>-1</sup> stable up to 1200 cycles at room temperature and a specific capacity of 100 mAh g<sup>-1</sup> under an ultrahigh current of 1 A g<sup>-1</sup> stable up to 700 cycles at a slightly elevated temperature of 40 °C have been achieved. Additionally, the ultrahigh rate, high-cycling stability, and long-cycle life of the anode are attributed to the stabilized structure; such a low-cost, simple, and environmentally friendly direct drop coating (DDC) method is developed to maximize the original state of the active materials. Remarkably, the self-healing ability of anodes is still presented under the ultrahigh charging current. This anode is promising for the development of high rate and high stability RMBs.