Commercial perfluorosulfonic acid membranes for vanadium redox flow battery: Effect of ion-exchange capacity and membrane internal structure

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F18%3A43917432" target="_blank" >RIV/60461373:22340/18:43917432 - isvavai.cz</a>

Alternative codes found

RIV/49777513:23640/18:43951182

Result on the web

<a href="http://dx.doi.org/10.1016/j.memsci.2018.02.011" target="_blank" >http://dx.doi.org/10.1016/j.memsci.2018.02.011</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.memsci.2018.02.011" target="_blank" >10.1016/j.memsci.2018.02.011</a>

Result language

angličtina

Original language name

Commercial perfluorosulfonic acid membranes for vanadium redox flow battery: Effect of ion-exchange capacity and membrane internal structure

Original language description

A series of perfluorosulfonic membranes is screened for application in vanadium redox flow batteries (VRFB): membranes of constant thickness 50 mu m with different ion-exchange capacities ranging from 0.56 to 1.15 mol eq.g(-1). Diffusion flux of each vanadium ion occurring in VRFB electrolytes through each examined membrane is measured by UV/Vis spectroscopy. Permeation of V2+ ions contributes most to the self-discharge losses and the mechanism of vanadium ions permeation is discussed for all oxidation states. The membranes are characterized in the single-cell by electrochemical impedance spectroscopy, load curve measurements with linearly increasing current and charge-discharge cycles at various current densities ranging from 50 to 200 mA cm(-2). Generally, at lower current densities the permeation of vanadium ions decreases the battery efficiency and thus lower ion-exchange capacity membranes are more suitable. Concurrently, at higher current densities the battery efficiency is decreased by the membrane resistance and thus higher ion-exchange capacity membranes are optimal. However, membrane ion-exchange capacity is not the only characteristic that affects the VRFB performance. Small-angle X-ray scattering of membranes revealed the effect of polymer molecular architecture on the size of hydrophilic domains which affects the membrane transport properties.

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

20401 - Chemical engineering (plants, products)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2018

Confidentiality

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

Name of the periodical

Journal of Membrane Science

ISSN

0376-7388

e-ISSN

—

Volume of the periodical

552

Issue of the periodical within the volume

1

Country of publishing house

BE - BELGIUM

Number of pages

11

Pages from-to

202-212

UT code for WoS article

000427491600021

EID of the result in the Scopus database

2-s2.0-85041747631