Comparative Analysis of Thermal Activation on Felts and Continuous Carbon Filament Electrodes for Vanadium Redox Flow Batteries

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F24%3APU152653" target="_blank" >RIV/00216305:26620/24:PU152653 - isvavai.cz</a>

Alternative codes found

RIV/00216275:25310/24:39921752

Result on the web

<a href="https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/celc.202400417" target="_blank" >https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/celc.202400417</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/celc.202400417" target="_blank" >10.1002/celc.202400417</a>

Result language

angličtina

Original language name

Comparative Analysis of Thermal Activation on Felts and Continuous Carbon Filament Electrodes for Vanadium Redox Flow Batteries

Original language description

Thermal treatments are commonly used to improve electrode kinetics in vanadium redox flow batteries (VRFB). The impact of the widely adopted thermal treatment-400 degrees C for least 24 hours-was investigated on polyacrylonitrile (PAN)-based continuous carbon filaments (tows) and compared to PAN-based graphite felts. Surface properties were assessed with scanning electron microscopy (SEM), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and wettability measurements. The electrode activity was investigated via electrochemical impedance spectroscopy (EIS). Charge-transfer resistances and the constant phase element parameters related to the electric double layer were determined, revealing a correlation between enhanced electrode activity and increased double layer across all electrodes. An 8-hour 400 degrees C thermal treatment was sufficient to improve electrode activity for tows, whereas felts required longer durations, up to 24 hours, attributed to differences in the carbonization process employed for each material, with the tows undergoing continuous processing and the felts following a batch process. Three-electrode half-cell EIS measurements were conducted to elucidate positive and negative electrode contributions. Activated continuous carbon filament electrodes exhibited consistent electrode activities in both the catholyte (VO2+/VO2+) and anolyte (V3+/V2+), whereas the electrochemical activity of felts was limited by the electrode deactivation in the anolyte.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10400 - Chemical sciences

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

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

Name of the periodical

ChemElectroChem

ISSN

2196-0216

e-ISSN

—

Volume of the periodical

11

Issue of the periodical within the volume

21

Country of publishing house

DE - GERMANY

Number of pages

13

Pages from-to

„“-„“

UT code for WoS article

001330623500001

EID of the result in the Scopus database

2-s2.0-85205735099