Ion-Dipole Interaction Driven Alumina-Coated Polyethylene Separator with Enhanced Wettability for High-Performance Rechargeable Aluminum Batteries
Article
Article Title | Ion-Dipole Interaction Driven Alumina-Coated Polyethylene Separator with Enhanced Wettability for High-Performance Rechargeable Aluminum Batteries |
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ERA Journal ID | 1369 |
Article Category | Article |
Authors | Ahmed, Nashaat, Rakov, Dmitrii A., Liu, Yang, Feng, Jiayou, Chen, Shuimei, Wu, Yuzheng, Cheng, Yongle, Nanjundan, Ashok Kumar, Yu, Chengzhong and Huang, Xiaodan |
Journal Title | Nano Letters |
Journal Citation | 25 (32), p. 12326–12333 |
Number of Pages | 8 |
Year | 2025 |
Publisher | American Chemical Society |
Place of Publication | United States |
ISSN | 1530-6984 |
1530-6992 | |
Digital Object Identifier (DOI) | https://doi.org/10.1021/acs.nanolett.5c02955 |
Web Address (URL) | https://pubs.acs.org/doi/10.1021/acs.nanolett.5c02955 |
Abstract | Separators are essential for safe and efficient battery operation. Polyolefin separators like polyethylene (PE) are widely used in lithium-ion batteries but are incompatible with strongly polar electrolytes, such as chloroaluminate ionic liquids in rechargeable aluminum batteries (RABs). Glass fiber (GF) membranes are commonly used in RABs due to good wettability, but their excessive thickness, mechanical fragility, and nonuniform macropores limit practicality. This study investigates the feasibility of utilizing an alumina-coated PE (Al2O3–PE) separator for RABs. Theoretical and experimental analyses show that the polarizable Al2O3 induces strong ion–dipole interactions with RAB electrolytes, imparting exceptional wettability and electrolyte uptake. Combined with its uniform nanopore structure, Al2O3–PE enables homogeneous ion flux for reversible Al stripping/plating with dendrite suppression. In RABs with graphene cathodes, Al2O3–PE outperforms GF separators, achieving higher capacity, improved rate performance, and long cycling stability. Flexible pouch cells with Al2O3–PE demonstrate stable operation under bending, supporting practical application. |
Keywords | rechargeable aluminum batteries; separators; wettability; ion-dipole interactions; surface polarization |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 401703. Energy generation, conversion and storage (excl. chemical and electrical) |
401699. Materials engineering not elsewhere classified | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Queensland |
Shanghai Energy New Materials Technology, China | |
Centre for Future Materials | |
School of Engineering | |
East China Normal University, China |
https://research.usq.edu.au/item/zz4x0/ion-dipole-interaction-driven-alumina-coated-polyethylene-separator-with-enhanced-wettability-for-high-performance-rechargeable-aluminum-batteries
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