Journal article
Protective Al2O3 Thin Film Coating by ALD to Enhance the Anodic Stability of Metallic Current Collectors in Ethereal Mg Electrolyte Solutions
Journal of the Electrochemical Society, v 171(2), 020540
01 Feb 2024
Abstract
Rechargeable magnesium batteries (RMBs) have the potential to contribute towards alternative energy storage due to their low cost, high abundance, dendrites free deposition of Mg and high volumetric energy density. Organometallic complex-based electrolytes in ethereal solutions have been extensively studied in the context of RMBs due to their ability to facilitate highly reversible magnesium deposition in rechargeable magnesium batteries, while demonstrating wide enough electrochemical stability windows. However, these solutions containing unique mixture of organo-halo aluminate complexes have detrimental effect on the anodic stability of metallic current collectors for cathodes, like Ni and Al foils. In this work, we were able to synthesize and isolate Mg2Cl3(THF)(6)Ph2AlCl2/THF electrolyte as the sole electroactive species using simple precursors: Ph2AlCl and MgCl2 in THF, via atom efficient mono-chloro abstraction Schlenk technique. We characterized the anodic stability of Ni, Ni@C, Al, and Al@C current collectors by monitoring their electrochemical behavior. In addition, we investigated the anodic stability enhancement of various current collectors by Al2O3 thin films coating using Atomic Layer Deposition (ALD). Linear sweep voltametric studies showed that coating current collectors enhanced the oxidative stability of Al and Ni foils by 0.1-0.3 V vs Mg/Mg2+ compared to the uncoated foils. In particular, Al2O3 coated Al@C showed an improved oxidative stability of 2.8 V vs Mg/Mg2+. Our findings show that current collectors protection by ALD coating can help in long-term stability and improving RMBs' energy density by using high voltage cathode materials, a crucial step in developing practical rechargeable Mg batteries. (c) 2024 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited.
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Details
- Title
- Protective Al2O3 Thin Film Coating by ALD to Enhance the Anodic Stability of Metallic Current Collectors in Ethereal Mg Electrolyte Solutions
- Creators
- Ananya Maddegalla - Bar-Ilan UniversityYogendra Kumar - Bar-Ilan UniversitySri Harsha Akella - Bar-Ilan UniversitySarah Taragin - Bar-Ilan UniversityDmitry Bravo-Zhivotovskii - Technion – Israel Institute of TechnologyHari Krishna Sadhanala - Bar-Ilan UniversityDoron Aurbach - Bar-Ilan UniversityMalachi Noked - Bar-Ilan University
- Publication Details
- Journal of the Electrochemical Society, v 171(2), 020540
- Publisher
- Electrochemical Soc Inc
- Number of pages
- 9
- Grant note
- Advanced Materials, Israel
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:001173520300001
- Scopus ID
- 2-s2.0-85185844988
- Other Identifier
- 991022004776604721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Electrochemistry
- Materials Science, Coatings & Films