Performance enhancement of vanadium redox flow battery by optimized electrode compression and operational conditions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F20%3A43921561" target="_blank" >RIV/60461373:22340/20:43921561 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/49777513:23640/20:43960791

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2352152X20302437?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2352152X20302437?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.est.2020.101468" target="_blank" >10.1016/j.est.2020.101468</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Performance enhancement of vanadium redox flow battery by optimized electrode compression and operational conditions

Popis výsledku v původním jazyce

Two different commercial carbon felt electrodes for vanadium redox flow battery, based on polyacrylonitrile and rayon, are tested and compared in order to evaluate the effect of felt compression on the battery performance in terms of cell polarization and pressure drop through the felt. The following properties are measured under different felt compression ratios: electrical and mechanical properties of the felt, pressure drop through the felt and performance in lab-scale single-cell. Optimum compression ratio (30% for polyacrylonitrile and 60% for rayon) is evaluated as a minimum of total power losses caused by cell polarization and electrolyte pumping. At the optimized felt compression the effect of electrolyte flow rate and operating temperature on the cell performance is studied at different states of charge by combination of electrochemical impedance spectrometry and load curve measurements. The minimum cell resistance, evaluated from load curves, is found around 50% state of charge for charging and around 70% state of charge for discharging for both electrode materials. The optimized compression together with optimized thermal activation of the electrodes and proper membrane selection enabled us to achieve outstanding peak power densities over 1.1 W cm(-2), which is by far the highest value published for a simple flow-through design.

Název v anglickém jazyce

Performance enhancement of vanadium redox flow battery by optimized electrode compression and operational conditions

Popis výsledku anglicky

Two different commercial carbon felt electrodes for vanadium redox flow battery, based on polyacrylonitrile and rayon, are tested and compared in order to evaluate the effect of felt compression on the battery performance in terms of cell polarization and pressure drop through the felt. The following properties are measured under different felt compression ratios: electrical and mechanical properties of the felt, pressure drop through the felt and performance in lab-scale single-cell. Optimum compression ratio (30% for polyacrylonitrile and 60% for rayon) is evaluated as a minimum of total power losses caused by cell polarization and electrolyte pumping. At the optimized felt compression the effect of electrolyte flow rate and operating temperature on the cell performance is studied at different states of charge by combination of electrochemical impedance spectrometry and load curve measurements. The minimum cell resistance, evaluated from load curves, is found around 50% state of charge for charging and around 70% state of charge for discharging for both electrode materials. The optimized compression together with optimized thermal activation of the electrodes and proper membrane selection enabled us to achieve outstanding peak power densities over 1.1 W cm(-2), which is by far the highest value published for a simple flow-through design.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20401 - Chemical engineering (plants, products)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Journal of Energy Storage

ISSN

2352-152X

e-ISSN

—

Svazek periodika

30

Číslo periodika v rámci svazku

AUG 2020

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

—

Kód UT WoS článku

000559032900002

EID výsledku v databázi Scopus

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