Journal
APPLIED SURFACE SCIENCE
Volume 546, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2021.148941
Keywords
Boron; Hydrophilic; Carbon felt; Heteroatom doping; Vanadium redox flow battery
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Funding
- Energy Efficiency & Resources Core Technology Program of the KETEP [20172420108630]
- KEPCO [R20XO02-3]
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Boron-doped carbon felt is proposed as a promising electrode for vanadium redox flow batteries, with enhanced affinity with electrolytes and improved energy efficiency attributed to its enhanced electrocatalytic properties towards redox reactions.
Herein, boron-doped carbon felt (B-CF) was proposed as a promising electrode for ensuring the outstanding electrochemical performance of vanadium redox flow batteries (VRFBs). Boron-functional groups can be successfully introduced onto carbon felt (CF) via NH4BF4 treatment. The hydrophobic nature of CF is changed to hydrophilicity via the incorporation of boron-functional groups, resulting in excellent affinity with the electrolytes of VRFBs. A VRFB cell containing B-CF exhibits higher energy efficiency (80.56%) than that of CF (63.40%) at 100 mA cm(-2) current density. This improvement is attributed to the enhanced electrocatalytic properties of B-CF toward VO2+/VO2+ and V2+/V3+ redox reactions.
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