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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

International Journal of Hydrogen Energy

ISSN

0360-3199

e-ISSN

1879-3487

Svazek periodika

180

Číslo periodika v rámci svazku

Oct

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

151665

Kód UT WoS článku

001586670300001

EID výsledku v databázi Scopus

2-s2.0-105017234165