Reversible, Dendrite-Free, High-Capacity Aluminum Metal Anode Enabled by Aluminophilic Interface Layer

作者：Meng, Yahan; Wang, Mingming; Li, Ke; Zhu, Zhengxin; Liu, Zaichun; Jiang, Taoli; Zheng, Xinhua; Zhang, Kai; Wang, Weiping; Peng, Qia; Xie, Zehui; Wang, Yu; Chen, Wei^*

来源：Nano Letters, 2023, 23(6): 2295-2303.

DOI：10.1021/acs.nanolett.2c05077

• aluminophilic interface layer
• anode-free
• Al plating
• stripping
• dendrite-free
• Al metal battery

Aluminum (Al) metal is an attractive anode material for next-generation rechargeable batteries, because of its low cost and high capacities. However, it brings some fundamental issues such as dendrites, low Coulombic efficiency (CE), and low utilization. Here, we propose a strategy for constructing an ultrathin aluminophilic interface layer (AIL) to regulate the Al nucleation and growth behaviors, which enables highly reversible and dendrite-free Al plating/stripping under high areal capacity. Metallic Al can maintain stable plating/stripping on the Pt-AIL@Ti for over 2000 h at 10 mAh cm-2 with an average CE of 99.9%. The Pt-AIL also enables reversible Al plating/stripping at a record high areal capacity of 50 mAh cm-2, which is 1-2 orders of magnitude higher than the previous studies. This work provides a valuable direction for further construction of high-performance rechargeable Al metal batteries.