Large-Scale Integration of the Ion-Reinforced Phytic Acid Layer Stabilizing Magnesium Metal Anode

Rechargeable magnesium batteries (RMBs) have garnered significant attention for their potential in large-scale energy storage applications. However, the commercial development of RMBs has been severely hampered by the rapid failure of large-sized Mg metal anodes, especially under fast and deep cycli...

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Bibliographic Details
Published in:	ACS nano Vol. 18; no. 18; pp. 11740 - 11752
Main Authors:	Wen, Tiantian, Tan, Shuangshuang, Li, Rong, Huang, Xueting, Xiao, Hui, Teng, Xuxi, Jia, Hongxing, Xiong, Fangyu, Huang, Guangsheng, Qu, Baihua, Song, Jiangfeng, Wang, Jingfeng, Tang, Aitao, Pan, Fusheng
Format:	Journal Article
Language:	English
Published:	United States American Chemical Society 07-05-2024
Subjects:	large-sized Mg anode uniform Mg plating/stripping artificial SEI ion-reinforced phytic acid layer Mg pouch cell
Online Access:	Get full text
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Summary:	Rechargeable magnesium batteries (RMBs) have garnered significant attention for their potential in large-scale energy storage applications. However, the commercial development of RMBs has been severely hampered by the rapid failure of large-sized Mg metal anodes, especially under fast and deep cycling conditions. Herein, a concept proof involving a large-scale ion-reinforced phytic acid (PA) layer (100 cm × 7.5 cm) with an excellent water–oxygen tolerance, high Mg2+ conductivity, and favorable electrochemical stability is proposed to enable rapid and uniform plating/stripping of Mg metal anode. Guided by even distributions of Mg2+ flux and electric field, the as-prepared large-sized PA-Al@Mg electrode (5.8 cm × 4.5 cm) exhibits no perforation and uniform Mg plating/stripping after cycling. Consequently, an ultralong lifespan (2400 h at 3 mA cm–2 with 1 mAh cm–2) and high current tolerance (300 h at 9 mA cm–2 with 1 mAh cm–2) of the symmetric cell using the PA-Al@Mg anode could be achieved. Notably, the PA-Al@Mg//Mo6S8 full cell demonstrates exceptional stability, operating for 8000 cycles at 5 C with a capacity retention of 99.8%, surpassing that of bare Mg (3000 cycles, 74.7%). Moreover, a large-sized PA-Al@Mg anode successfully contributes to the stable pouch cell (200 and 750 cycles at 0.1 and 1 C), further confirming its significant potential for practical utilization. This work provides valuable theoretical insights and technological support for the practical implementation of RMBs.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1936-0851 1936-086X
DOI:	10.1021/acsnano.3c13028