Anion‐Confined Interface Enabling Uniform Stripping of Magnesium Anode

Abstract The non‐uniform stripping behavior of magnesium (Mg) anodes severely limits their utilization ratio and areal capacity, presenting a critical barrier to the practical application of Mg‐based batteries. Herein, an anion‐confined interface on the Mg anode is introduced that facilitates uniform stripping by regulating the migration of interfacial anions. This strategy enables Mg anodes to achieve a record‐high areal capacity of 17.24 mAh·cm −2 with a utilization ratio of 90%. Consequently, an unprecedented ampere‐hour‐scale rechargeable Mg‐ion pouch cell is demonstrated. Furthermore, modified Mg‐air batteries exhibit stable operation with a high average energy density of 2300 Wh·kg −1 , reducing performance deviation from 16.3% to 4.4%. These findings provide mechanistic insights into ion migration control at the Mg interface and offer a robust pathway toward high‐performance Mg‐based batteries.

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Publication Details

Journal
Advanced Functional Materials
Published
2025-09-29
DOI
https://doi.org/10.1002/adfm.202515076
Primary Topic
Advancements in Battery Materials
Type
article
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article

Anion‐Confined Interface Enabling Uniform Stripping of Magnesium Anode

Er He, Haoran Xing, H.-B. Zhang, Qianming Li et al.
Advanced Functional Materials
Advancements in Battery Materials
article

Anion‐Confined Interface Enabling Uniform Stripping of Magnesium Anode

Er He, Haoran Xing, H.-B. Zhang, Qianming Li, Yiding Jiao, Lu Jiang, Chenyu Bai, Yuanzhen Wang, Cheng‐Hui Li, Yiran Li, Ye Zhang, Wang Haidong, Jie Song, Fangyan Li, Tingting Ye, Shuo Yang, Kuangyi Zou
article en

Abstract

Abstract The non‐uniform stripping behavior of magnesium (Mg) anodes severely limits their utilization ratio and areal capacity, presenting a critical barrier to the practical application of Mg‐based batteries. Herein, an anion‐confined interface on the Mg anode is introduced that facilitates uniform stripping by regulating the migration of interfacial anions. This strategy enables Mg anodes to achieve a record‐high areal capacity of 17.24 mAh·cm −2 with a utilization ratio of 90%. Consequently, an unprecedented ampere‐hour‐scale rechargeable Mg‐ion pouch cell is demonstrated. Furthermore, modified Mg‐air batteries exhibit stable operation with a high average energy density of 2300 Wh·kg −1 , reducing performance deviation from 16.3% to 4.4%. These findings provide mechanistic insights into ion migration control at the Mg interface and offer a robust pathway toward high‐performance Mg‐based batteries.

Advanced Functional MaterialsVol. 36(16)
Collaborative Innovation Center of Advanced Microstructures (CN), Nanjing University (CN)
Openalex Percentile: Top 73%
Advancements in Battery Materials
DOISourceOpenAlex
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