Abstract
To enable the excellent performance of vanadium redox flow batteries (VRFBs) at high current density, dimethyl sulfoxide (DMSO) treated Ti3C2TX as an electrocatalyst for V3+/V2+ reaction is proposed in this paper. Furthermore, the influence of treatment method on the property of surface terminations of Ti3C2TX and the corresponding catalytic activity toward V3+/V2+ reaction is revealed. The results demonstrate that DMSO treated Ti3C2TX exhibits better catalytic activity than sodium hydroxide (NaOH) treated Ti3C2TX. The cell equipped with DMSO treated Ti3C2TX presents an energy efficiency (EE) of 81.5% and discharge capacity of 690 mAh at the current density of 150 mA·cm−2, which is 16.2% and 30.9% higher than that with polyacrylonitrile-based graphite felt (GF). Additionally, the efficiency of the cell has no decay during 400 cycles of charge-discharge tests at 150 mA·cm−2. The improved cell performance is attributed to abundant active sites and improved reaction kinetics toward V3+/V2+ reaction due to introducing DMSO treated Ti3C2TX.
Funder
Foundation from Liaoning Province of China
Liaoning Revitalization Talents Program
Department of Education of Liaoning Province
National Natural Science Foundation of China
Publisher
The Electrochemical Society
Subject
Materials Chemistry,Electrochemistry,Surfaces, Coatings and Films,Condensed Matter Physics,Renewable Energy, Sustainability and the Environment,Electronic, Optical and Magnetic Materials
Cited by
8 articles.
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