Journal article
Two-Dimensional MXene Modified Electrodes for Improved Anodic Performance in Vanadium Redox Flow Batteries
Journal of the Electrochemical Society, v 168(9), 90518
01 Sep 2021
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
In this work, Ti3C2Tx MXene was investigated as electrocatalyst material for the anodic V2+/V3+ reaction in vanadium redox flow batteries (VRFBs). A simple drop coating process was established using additive-free, aqueous MXene dispersions to fabricate MXene-coated carbon paper electrodes. The performance of Ti3C2Tx as an anodic electrocatalyst was studied using cyclic voltammetry and electrochemical impedance spectroscopy in a three-electrode cell. Furthermore, flow battery testing was performed to determine the performance of the modified electrodes. At a current density of 50 mA cm(-2), the electrode with Ti3C2Tx loading of 0.2 mg cm(-2) enabled a 7% higher energy efficiency and 22% higher electrolyte utilization rate than the pristine electrode. At a higher current density (100 mA cm(-2)), the energy efficiency and electrolyte utilization were increased by 17% and 46%, respectively. At 50% SOC, the coated electrode was able to reach a limiting current density of 220 mA cm(-2) while maintaining a voltaic efficiency above 80%, whereas the pristine electrode could only reach up to 160 mA cm(-2) at the same voltaic efficiency. The improved performance was mainly attributed to the enhanced electrode kinetics, increased electrochemically active surface area, and improved wetting properties due to the addition of Ti3C2Tx nanoflakes.
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Details
- Title
- Two-Dimensional MXene Modified Electrodes for Improved Anodic Performance in Vanadium Redox Flow Batteries
- Creators
- Ali Vala Mizrak - Drexel UniversitySimge Uzun - Drexel UniversityBilen Akuzum - Drexel UniversityLutfi Agartan - Drexel UniversityYury Gogotsi - Drexel UniversityE. Caglan Kumbur - Drexel University, Mechanical Engineering and Mechanics
- Publication Details
- Journal of the Electrochemical Society, v 168(9), 90518
- Publisher
- Electrochemical Soc Inc
- Number of pages
- 10
- Grant note
- Fluid Interface Reactions, Structures, and Transport (FIRST) Center, an Energy Frontier Research Center (EFRC) - U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences; United States Department of Energy (DOE) 2034108 / National Science Foundation; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000694445900001
- Scopus ID
- 2-s2.0-85115144398
- Other Identifier
- 991019168678604721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Electrochemistry
- Materials Science, Coatings & Films