Effect of graphite felt properties on the long-term durability of negative electrode in vanadium redox flow battery
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F19%3A43920029" target="_blank" >RIV/60461373:22310/19:43920029 - isvavai.cz</a>
Alternative codes found
RIV/60461373:22330/19:43920029 RIV/60461373:22340/19:43920029 RIV/49777513:23640/19:43955092
Result on the web
<a href="https://www.sciencedirect.com/science/article/abs/pii/S0378775319300205" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0378775319300205</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jpowsour.2019.01.019" target="_blank" >10.1016/j.jpowsour.2019.01.019</a>
Alternative languages
Result language
angličtina
Original language name
Effect of graphite felt properties on the long-term durability of negative electrode in vanadium redox flow battery
Original language description
In our contribution we study the long-term durability of two different graphite felt materials serving as negative electrode in vanadium redox flow battery. Both electrodes differ in the precursor material and the way of activation which causes significant differences in relevant properties such as electric conductivity, specific surface area and electrochemical double layer capacitance. The performance stability of the felts within 2000 charge-discharge cycles conducted in lab-scale single-cell is evaluated from 4-point characterization before the cycling and after each 1000 cycles. Significant deterioration of electrocatalytic activity is observed for commercially activated polyacrylonitrile-based negative electrode, whereas the in-house activated rayon-based negative electrode provides stable performance over the whole tested period. A comprehensive post-mortem characterization is performed to identify the causes of different durability of both negative electrodes. X-ray photoelectron spectroscopy analysis reveals very similar changes in surface functionalization by oxygen-containing groups for both felts; however, the decrease of sp2-hybridized carbon and simultaneous increase of sp3-hybridized one is significantly higher for the unstable polyacrylonitrile-based felt. Although the performance deterioration of the polyacrylonitrile-based felt cannot be related to the decrease of the surface area or double-layer capacitance, the high surface area of activated rayon-based felt most probably contributes to its excellent performance stability. © 2019 Elsevier B.V.
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
20401 - Chemical engineering (plants, products)
Result continuities
Project
<a href="/en/project/LO1402" target="_blank" >LO1402: CENTEM+</a><br>
Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Power Sources
ISSN
0378-7753
e-ISSN
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Volume of the periodical
414
Issue of the periodical within the volume
28. únor 2019
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
354-365
UT code for WoS article
000458709900043
EID of the result in the Scopus database
2-s2.0-85059832261