Journal article
Solving the Capacitive Paradox of 2D MXene using Electrochemical Quartz‐Crystal Admittance and In Situ Electronic Conductance Measurements
Advanced energy materials, v 5(1), pp 1400815-n/a
07 Jan 2015
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Fast ion adsorption processes in supercapacitors enable quick storage/delivery of significant amounts of energy, while ion intercalation in battery materials leads to even larger amounts of energy stored, but at substantially lower rates due to diffusional limitations. Intercalation of ions into the recently discovered 2D Ti3C2Tx (MXene) occurs with a very high rate and leads to high capacitance, posing a paradox. Herein, by characterizing the mechanical deformations of MXene electrode materials at various states‐of‐charge with a variety of cations (Li, Na, K, Cs, Mg, Ca, Ba, and three tetraalkylammonium cations) during cycling by electrochemical quartz‐crystal admittance (EQCA, quartz‐crystal microbalance with dissipation monitoring) combined with in situ electronic conductance and electrochemical impedance, light is shone on this paradox. Based on this work, it appears that the capacitive paradox stems from cationic insertion, accompanied by significant deformation of the MXene particles, that occurs so rapidly so as to resemble 2D ion adsorption at solid‐liquid interfaces. The latter is greatly facilitated by the presence of water molecules between the MXene sheets.
Novel approach is used to explain the origin of the perfect capacitance response of the recently discovered 2D titanium carbide, MXene, observed at high charge/discharge rates. Its principle is based on the characterization of the mechanical deformations during charge/discharge by electrochemical quartz‐crystal admittance (EQCA) complemented by in situ electronic conductance and electrochemical impedance.
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Details
- Title
- Solving the Capacitive Paradox of 2D MXene using Electrochemical Quartz‐Crystal Admittance and In Situ Electronic Conductance Measurements
- Creators
- Mikhael D Levi - Bar‐Ilan UniversityMaria R Lukatskaya - Drexel UniversitySergey Sigalov - Bar‐Ilan UniversityMajid Beidaghi - Drexel UniversityNetanel Shpigel - Bar‐Ilan UniversityLeonid Daikhin - Tel‐Aviv UniversityDoron Aurbach - Bar‐Ilan UniversityMichel W Barsoum - Drexel UniversityYury Gogotsi - Drexel University
- Publication Details
- Advanced energy materials, v 5(1), pp 1400815-n/a
- Publisher
- Wiley
- Number of pages
- 11
- Grant note
- US Department of Energy, Office of Science, Office of Basic Energy Sciences
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000347534800011
- Scopus ID
- 2-s2.0-84920854732
- Other Identifier
- 991014970029904721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Energy & Fuels
- Materials Science, Multidisciplinary
- Physics, Applied
- Physics, Condensed Matter