Mg-Rich LAPONITE® interface protective layer enables reversible, corrosion-resistant anodes for high-performance magnesium metal batteries

Jingxuan Bi, Xiaomei Huo, Zhenkai Zhou, Junhui Li, Ke Wang, Zhuzhu Du, Wei Ai

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Magnesium metal batteries (MMBs) are considered one of the most promising candidates for the post-lithium era but face significant challenges, including non-uniform plating, irregular stripping, and interface passivation. Herein, we have developed a highly reversible, passivation-free, and corrosion-resistant Mg metal anode by integrating a Mg-rich LAPONITE® (Mg-RL) interface protective layer using a doctor-blading technique. The Mg-RL interface protective layer, with its negatively charged interlayer structure, creates abundant cation transport channels and isolates direct contact between the electrolyte and anode, thus facilitating highly reversible Mg plating/stripping while suppressing anode passivation. As a result, Mg-RL/Mg-based symmetric cells exhibit exceptional cycling stability, maintaining over 1500 h in APC electrolyte and 800 h in Mg(TFSI)2 electrolyte under practical current densities and area capacities. Furthermore, the corresponding Mo6S8-based full cells demonstrate excellent electrochemical performance, and the Mg-S pouch cells successfully power a toy car, demonstrating practical viability. This study presents a simple, cost-effective strategy for constructing artificial interface protective layers of Mg metal anodes, advancing the development of stable and safe MMBs.

Original languageEnglish
Pages (from-to)3653-3662
Number of pages10
JournalInorganic Chemistry Frontiers
Volume12
Issue number10
DOIs
StatePublished - 14 Mar 2025

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