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Journal article
Hydrogen-Bond Restructuring of Water-in-Salt Electrolyte Confined in Ti 3 C 2 T x MXene Monitored by Operando Infrared Spectroscopy
The journal of physical chemistry letters, v 14(6), pp 1578-1584
07 Feb 2023
PMID: 36748744
Abstract
Highly concentrated water-in-salt aqueous electrolytes exhibit a wider potential window compared to conventional, dilute aqueous electrolytes. Coupled with MXenes, a family of two-dimensional transition metal carbides and nitrides with impressive charge storage capabilities, water-in-salt electrolytes present a potential candidate to replace flammable and toxic organic solvents in electrochemical energy storage devices. A new charge storage mechanism was recently discovered during electrochemical cycling of Ti3C2Tx MXene electrodes in lithium-based water-in-salt electrolytes, attributed to intercalation and deintercalation of solvated Li+ ions at anodic potentials. Nevertheless, direct evidence of the state of Li+ solvation during cycling is still missing. Here, we investigate the hydrogen bonding of water intercalated between MXene layers during electrochemical cycling in a water-in-salt electrolyte with operando infrared spectroscopy. The hydrogen-bonding state of the confined water was found to change significantly as a function of potential and the concentration of Li+ ions in the interlayer space. This study provides fundamentally new insights into the electrolyte structural changes while intercalating Li+ in the MXene interlayer space.
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Details
- Title
- Hydrogen-Bond Restructuring of Water-in-Salt Electrolyte Confined in Ti 3 C 2 T x MXene Monitored by Operando Infrared Spectroscopy
- Creators
- Mailis Lounasvuori - Helmholtz-Zentrum Berlin für Materialien und EnergieTyler S Mathis - Drexel UniversityYury Gogotsi - Drexel UniversityTristan Petit - Helmholtz-Zentrum Berlin für Materialien und Energie
- Publication Details
- The journal of physical chemistry letters, v 14(6), pp 1578-1584
- Publisher
- American Chemical Society (ACS)
- Number of pages
- 7
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000931956500001
- Scopus ID
- 2-s2.0-85147817133
- Other Identifier
- 991020056242604721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Atomic, Molecular & Chemical