Comparison of fluorinated membranes in all-vanadium redox flow battery

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Comparison of fluorinated membranes in all-vanadium redox flow battery

Popis výsledku v původním jazyce

In last several years redox flow batteries start to play an important role in energy management systems due to their flexible installation and operation, versatile scalability, reduced rate of self-discharge and high round-trip efficiency. The all-vanadium redox flow battery (VRFB) offers the efficient energy storage of flexible capacity, predominantly for stationary applications, such as load levelling, smart-grids, peak shaving and back-up sources. The ion-exchange membrane separates individual electrode compartments of the cell. It is the key component of the VRFB stack, as it directly influences the power, efficiency and price of the system. The resistance of the membrane counts up to 50% of total internal resistance of the battery stack. Generally, there are numerous types of the ion-exchange membranes that can be used in VRFB (anion- vs. cation-exchange, homogenous vs. heterogeneous). The reduction of the membrane cost together with the simultaneous improvement of the relevant properties such as conductivity, selectivity and durability represents the highly appreciated way of the VRFB development. Within the study, various commercially available fluorinated polymeric ion-exchange membranes were characterized with respect to the ionic conductivity, water uptake, swelling and mechanical properties. The particular attention was paid to the issue of the membrane permeability for vanadium ions of different oxidation states (4+, 3+) and to membrane durability in highly oxidative environment of VO2+ ions. The impact of membrane structure, method of the fabrication and preconditioning, thickness and ion-exchange capacity on the measured characteristics was observed. The membranes were also tested in our laboratory VRFB single-cell. .64-2000 znaků. Anotace nesmí být totožná s názvem.

Název v anglickém jazyce

Comparison of fluorinated membranes in all-vanadium redox flow battery

Popis výsledku anglicky

In last several years redox flow batteries start to play an important role in energy management systems due to their flexible installation and operation, versatile scalability, reduced rate of self-discharge and high round-trip efficiency. The all-vanadium redox flow battery (VRFB) offers the efficient energy storage of flexible capacity, predominantly for stationary applications, such as load levelling, smart-grids, peak shaving and back-up sources. The ion-exchange membrane separates individual electrode compartments of the cell. It is the key component of the VRFB stack, as it directly influences the power, efficiency and price of the system. The resistance of the membrane counts up to 50% of total internal resistance of the battery stack. Generally, there are numerous types of the ion-exchange membranes that can be used in VRFB (anion- vs. cation-exchange, homogenous vs. heterogeneous). The reduction of the membrane cost together with the simultaneous improvement of the relevant properties such as conductivity, selectivity and durability represents the highly appreciated way of the VRFB development. Within the study, various commercially available fluorinated polymeric ion-exchange membranes were characterized with respect to the ionic conductivity, water uptake, swelling and mechanical properties. The particular attention was paid to the issue of the membrane permeability for vanadium ions of different oxidation states (4+, 3+) and to membrane durability in highly oxidative environment of VO2+ ions. The impact of membrane structure, method of the fabrication and preconditioning, thickness and ion-exchange capacity on the measured characteristics was observed. The membranes were also tested in our laboratory VRFB single-cell. .64-2000 znaků. Anotace nesmí být totožná s názvem.

Druh

D - Stať ve sborníku

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název statě ve sborníku

The International Flow Battery Forum 2016 Conference Papers

ISBN

978-0-9571055-6-0

ISSN

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e-ISSN

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Počet stran výsledku

2

Strana od-do

130-131

Název nakladatele

Compass Graphic Design Ltd

Místo vydání

Wiltshire

Místo konání akce

Karlsruhe

Datum konání akce

7. 6. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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