Files and links (1)
SubmittedOpen Access (License Unspecified), Open
Journal article
Probing the In Situ Pseudocapacitive Charge Storage in Ti3C2 MXene Thin Films with X-ray Reflectivity
ACS applied materials & interfaces, v 13(36), pp 43597-43605
15 Sep 2021
PMID: 34464097
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
MXenes are a large family of two-dimensional materials that are attractive for energy storage due to their high-rate charging capabilities as well as for electrochemical actuators, water purification, and many other technologies. Ion intercalation during electrochemically driven charge and discharge processes is the fundamental process associated with MXene functionality, which we have characterized using in situ and operando X-ray reflectivity (XRR). Experiments performed at the Advanced Photon Source at Argonne National Laboratory monitored the changes in the structure of a Ti3C2 MXene film on a platinum current collector as a function of static applied potential between 0.3 and -0.7 V vs Ag/AgCl in an aqueous 0.1 M Li2SO4 electrolyte. Negative potential sweeps lead to a contraction of 1.2 angstrom in the interlayer spacing and a loss of electron density between the layers, likely due to Li+ ion insertion and water removal. The change in lattice spacing includes a continuous variation vs potential as well as an additional discrete contraction that occurs near -0.35 V that has the characteristics of a first-order transition. The continuous change in the MXene interlayer spacing is associated with the capacitive charge, while the discrete change in structure correlated to the weak feature in the cyclic voltammogram at -0.35 V can be interpreted as either a pseudocapacitive charging process or a potential-dependent change in capacity.
Metrics
Details
- Title
- Probing the In Situ Pseudocapacitive Charge Storage in Ti3C2 MXene Thin Films with X-ray Reflectivity
- Creators
- Thomas B. Sobyra - Argonne National LaboratoryTyler S. Mathis - Drexel UniversityYury Gogotsi - Drexel UniversityPaul Fenter - Argonne National LaboratoryArgonne National Lab. (ANL), Argonne, IL (United States)
- Publication Details
- ACS applied materials & interfaces, v 13(36), pp 43597-43605
- Publisher
- American Chemical Society; Washington, DC
- Number of pages
- 9
- Grant note
- DE-AC02-06CH11357 / Argonne, a U.S. Department of Energy Office of Science laboratory; United States Department of Energy (DOE) Fluid Interface Reactions, Structures, and Transport (FIRST) Center, an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences; United States Department of Energy (DOE) DE-AC02-06CH11357 / U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences; United States Department of Energy (DOE)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000697282300120
- Scopus ID
- 2-s2.0-85115077079
- Other Identifier
- 991019167703204721
UN Sustainable Development Goals (SDGs)
This publication has contributed to the advancement of the following goals:
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology