Multifunctional role of bismuth: From catalytic etching of carbon felt to catalyzing VO2+/VO2+ and V3+/V2+ redox reactions for high-performance all-vanadium redox flow battery
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10510597" target="_blank" >RIV/00216208:11320/25:10510597 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=E2_mO6JehM" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=E2_mO6JehM</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ijhydene.2025.151665" target="_blank" >10.1016/j.ijhydene.2025.151665</a>
Alternative languages
Result language
angličtina
Original language name
Multifunctional role of bismuth: From catalytic etching of carbon felt to catalyzing VO2+/VO2+ and V3+/V2+ redox reactions for high-performance all-vanadium redox flow battery
Original language description
To enhance performance of all-vanadium redox flow batteries (VRFBs) at higher current densities, this study aimed at synthesizing multifunctional electrode material to address poor electrochemical kinetics of VO2+/VO2+ and V3+/V2+ redox reactions. In this context, carbon felt was solvothermally decorated with bismuth nanoparticles followed by thermal treatment in the air atmosphere. This unveiled role of bismuth in the catalytic etching of carbon fibers where the most favorable results were obtained at 400 degrees C and 1.5 h (Bi400-CF). Cyclic voltammetry and electrochemical impedance spectroscopy elucidated better redox kinetics of Bi400-CF for both positive and negative vanadium redox couples. In VRFB single cell performance, the Bi400-CF VRFB outperformed pristine CF by achieving 249, 34.7, and 34.9 % higher discharge capacity, energy efficiency, and voltage efficiency, respectively and a remarkable 3.5-fold increase in electrolyte utilization, at a current density of 150 mA cm(-2). Moreover, Bi400-CF exhibited commendable capacity retention of 86 % over 100 cycles. Therefore, the catalytic and surface etching effects of Bi2O3 on carbon felt demonstrate notable improvements in battery performance, suggesting strong potential for future practical implementation in VRFB systems.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
International Journal of Hydrogen Energy
ISSN
0360-3199
e-ISSN
1879-3487
Volume of the periodical
180
Issue of the periodical within the volume
Oct
Country of publishing house
GB - UNITED KINGDOM
Number of pages
11
Pages from-to
151665
UT code for WoS article
001586670300001
EID of the result in the Scopus database
2-s2.0-105017234165