Chelation‐Driven Electrolyte Design for Enhanced Interface and Electrochemical Window in Aqueous Aluminum Batteries
Abstract
Abstract Aqueous aluminum‐ion batteries have garnered significant attention owing to the abundance of aluminum resources, high theoretical specific capacity, and excellent safety. However, challenges such as electrolyte‐induced water decomposition, aluminum anode corrosion, and electrode material compatibility continue to constrain their performance. In this study, we restructured the solvation environment using the chelating reagent Bis(2‐methoxyethyl)amine (BMEA), achieving an expanded electrochemical window of 2.2 V and mitigating hydrogen evolution side reactions. Advanced atom probe tomography analysis confirmed that BMEA actively participates in the formation of the solid‐electrolyte interphase (SEI), effectively preventing aluminum surface corrosion and extending the cycle life of the aluminum anode. Employed as a BMEA‐containing electrolyte in aluminum–organic batteries, the resulting Al||Tetrachloro‐1,4‐benzoquinone (TCB) battery delivered a high capacity of 218.0 mAh g −1 and demonstrated stable cycling over 300 cycles. This study highlights the potential of chelating agents as additives in advancing high‐performance aluminum batteries.
Article Details
Authors (14)
Dan‐Yang Wang
Energy Research Institute @ NTU Nanyang Technological University Singapore 637141 Singapore
Erhai Hu
Energy Research Institute@NTU
Gang Wu
Honghan Choo
Energy Research Institute @ NTU Nanyang Technological University Singapore 637141 Singapore
Carlo Franke
Faculty of Mechanical Engineering Atomic‐scale Characterisation Ruhr‐Universität Bochum Universitätsstraße 150 Bochum 44801 Germany
Bei‐Er Jia
Energy Research Institute @ NTU Nanyang Technological University Singapore 637141 Singapore
Jinxuan Song
Energy Research Institute @ NTU Nanyang Technological University Singapore 637141 Singapore
Afriyanti Sumboja
Material Science and Engineering Research Group Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Jl. Ganesha 10 Bandung 40132 Indonesia
Ivandini T. Anggraningrum
Department of Chemistry University of Indonesia Depok 16424 Indonesia
Anne Zulfia Syahrial
Metallurgical & Materials Engineering Department Fakultas Teknik Universitas Indonesia Kampus UI Depok 16424 Indonesia
Qiang Zhu
School of Science and Molecular Horizons, ARC Centre of Excellence in Quantum Biotechnology
Man‐Fai Ng
Institute of High‐Performance Computing Agency for Science Technology and Research (A*STAR) Singapore 138632 Singapore
Tong Li
Qingyu Yan
School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore