A Bi-based artificial interphase to achieve ultra-long cycling life of Al-metal anode in non-aqueous electrolyte

A Bi-based artificial interphase to achieve ultra-long cycling life of Al-metal anode in non-aqueous electrolyte

Energy Storage Materials

10.1016/j.ensm.2023.103087

http://dx.doi.org/10.1016/j.ensm.2023.103087

Sonal Kumar, Prasad Rama, Wei Ying Lieu, Chang Zhang, Wutthikrai Busayaporn, Deviprasath Chinnadurai, Gaoliang Yang, Zhenxiang Xing, Yuanjian Li, Zareen Abbas, Wei Liu, Zhi Wei Seh

25 November 2023

Kumar, S., Rama, P., Lieu, W. Y., Zhang, C., Busayaporn, W., Chinnadurai, D., Yang, G., Xing, Z., Li, Y., Abbas, Z., Liu, W., & Seh, Z. W. (2024). A Bi-based artificial interphase to achieve ultra-long cycling life of Al-metal anode in non-aqueous electrolyte. Energy Storage Materials, 65, 103087. https://doi.org/10.1016/j.ensm.2023.103087

Rechargeable aluminum-ion batteries (RAB) with Al-metal anode are regarded as cost-effective and environmentally sustainable energy storage systems. However, tapping the high volumetric capacity of the Al-anode has been a challenge because of the spontaneous and irreversible formation of the oxide layer on its surface that renders it electrochemically inactive. Though recently reported AlCl3-based electrolytes overcome this problem by breaking down this oxide layer, their highly corrosive nature hampers commercialization. Here, we investigate a novel approach to protect the Al-anode from severe oxidation by engineering an artificial protective interphase. A unique and less corrosive combination of Al(CF3SO3)3 salt and BiCl3 additive reacts with the Al-anode intrinsically to form an inorganic-rich protective bilayer. This layer is electronically insulating and significantly reduces the charge transfer resistance and surface activation energy at the anode, enabling plating/stripping at extremely low overpotential of <0.1 V that can be sustained for record-long cycling times of >4000 h.

Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)

This research is supported by core funding from: Science and Engineering Research Council
Grant Reference no. :

https://oar.a-star.edu.sg/communities-collections/articles/21266

2405-8297

Institute of Materials Research and Engineering