Study of membranes and monitoring of electrolyte composition for vanadium redox flow battery

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F16%3A43902511" target="_blank" >RIV/60461373:22340/16:43902511 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Study of membranes and monitoring of electrolyte composition for vanadium redox flow battery

Original language description

The high proportion of electricity from intermittent renewable sources is a strongly motivating factor for the development of modern stationary energy storage, which can help to stabilize electricity grid and increase percentage of used renewable energy sources. Vanadium redox flow battery seems to be a good technology for stationary energy storage due to easily extendable capacity (energy stored in external tanks), power vs. capacity flexibility, high efficiency and long-term durability. As a concept the vanadium redox flow battery works well but the limiting factor for its large-scale commercialization are high investment costs of the system and conservative energy market. Ion exchange membranes, which separate positive and negative electrolyte in battery stack, significantly contribute to the overall costs of the system. At the same time, membrane properties significantly influence the operating parameters of the battery, such as energy efficiency and capacity decline. An experimental study of commercially available perfluorosulphonated membranes was carried out in this work. Diffusion tests of various vanadium ions across the membrane and characterization of these membranes by charge/discharge cycles in a laboratory battery single cell under at controlled conditions were the main methods for membrane characterization. Obtained results contribute to the understanding how the different parameters of the membrane (thickness, ion exchange capacity, inner structure) affect the properties of the battery. The second aim of this work was to develop a battery monitoring system that allows to determine the actual state of charge of the battery by the analysis of electrolyte by means of several cheap and common analytical techniques. Results measured with chemically pure electrolytes will be used for the calibration of the monitoring system that will be installed in the pilot-scale battery with power rating of 2 kW and capacity of 10 kWh.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

CI - Industrial chemistry and chemical engineering

OECD FORD branch

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Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2016

Confidentiality

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

Article name in the collection

Workshop of Students' Prezentations 2016 "Membranes and Membrane Processes"

ISBN

978-80-904517-8-0

ISSN

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e-ISSN

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Number of pages

13

Pages from-to

1-13

Publisher name

Česká membránová platforma

Place of publication

Česká Lípa

Event location

Stráž pod Ralskem

Event date

Oct 12, 2016

Type of event by nationality

CST - Celostátní akce

UT code for WoS article

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