Journal article
In situ monitoring redox processes in energy storage using UV-Vis spectroscopy
Nature energy, v 8(6), pp 567-576
01 Jun 2023
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Understanding energy storage mechanisms in electrochemical energy storage devices lays the foundations for improving their energy and power density. Here we introduce in situ ultraviolet-visible (UV-Vis) spectroscopy method to distinguish battery-type, pseudocapacitive and electrical double-layer charge storage processes. On the basis of Ti3C2Tx MXene in aqueous acidic and neutral electrolytes, and lithium titanium oxide in an organic electrolyte, we found a correlation between the evolution of UV-Vis spectra and the charge storage mechanism. The electron transfer number for Ti3C2Tx in an acidic electrolyte was calculated using quantitative analysis, which was close to previous measurements using X-ray absorption spectroscopy. Further, we tested the methodology to distinguish the non-Faradaic process in Ti3C2Tx MXene in a water-in-salt electrolyte, despite well-defined peaks in cyclic voltammograms. In situ UV-Vis spectroscopy is a fast and cost-effective technique that effectively supplements electrochemical characterization to track changes in oxidation state and materials chemistry and determine the charge storage mechanism.
It can be challenging for conventional electrochemical measurements to distinguish different types of charge storage mechanisms in electrochemical systems. Here the authors develop an in situ ultraviolet-visible spectroscopy approach as a powerful and affordable tool for this purpose.
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Details
- Title
- In situ monitoring redox processes in energy storage using UV-Vis spectroscopy
- Creators
- Danzhen Zhang - Drexel University, A.J. Drexel Nanomaterials InstituteRuocun (John) Wang - Drexel University, Materials Science and EngineeringXuehang Wang - Delft University of TechnologyYury Gogotsi - Drexel University, Materials Science and Engineering
- Publication Details
- Nature energy, v 8(6), pp 567-576
- Publisher
- Nature Publishing Group
- Number of pages
- 10
- Grant note
- Fluid Interface Reactions, Structures, and Transport (FIRST) Center, Energy Frontier Research Center (EFRC) - US Department of Energy, Office of Science and Office of Basic Energy Sciences; United States Department of Energy (DOE) DMR-2041050 / NSF; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; A.J. Drexel Nanomaterials Institute
- Web of Science ID
- WOS:000968306900001
- Scopus ID
- 2-s2.0-85151644552
- Other Identifier
- 991021861280104721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Energy & Fuels
- Materials Science, Multidisciplinary