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Layered composite membranes based on porous PVDF coated with a thin, dense PBI layer for vanadium redox flow batteries

Lee, Wonmi and Jung, Mina and Serhiichuk, Dmytro and Noh, Chanho and Gupta, Gaurav and Harms, Corinna and Kwon, Yongchai and Henkensmeier, Dirk (2019) Layered composite membranes based on porous PVDF coated with a thin, dense PBI layer for vanadium redox flow batteries. Journal of Membrane Science, 591, p. 117333. Elsevier. doi: 10.1016/j.memsci.2019.117333. ISSN 0376-7388.

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Official URL: http://www.sciencedirect.com/science/article/pii/S0376738819307380

Abstract

A commercial porous polyvinylidene fluoride membrane (pore size 0.65 μm, nominally 125 μm thick) is spray coated with 1.2–4 μm thick layers of polybenzimidazole. The area resistance of the porous support is 36.4 mΩ cm2 in 2 M sulfuric acid, in comparison to 540 mΩ cm2 for a 27 μm thick acid doped polybenzimidazole membrane, and 124 mΩ cm2 for PVDF-P20 (4 μm thick blocking layer). Addition of vanadium ions to the supporting electrolyte increases the resistance, but less than for Nafion. The expected reason is a change in the osmotic pressure when the ionic strength of the electrolyte is increased, reducing the water contents in the membrane. The orientation of the composite membranes has a strong impact. Lower permeability values are found when the blocking layer is oriented towards the vanadium-lean side in ex-situ measurements. Cells with the blocking layer on the positive side have significantly lower capacity fade, also much lower than cells using Nafion 212. The coulombic efficiency of cells with PVDF-PBI membranes (98.4%) is higher than that of cells using Nafion 212 (93.6%), whereas the voltage efficiency is just slightly lower, resulting in energy efficiencies of 85.1 and 83.3%, respectively, at 80 mA/cm2.

Item URL in elib:https://elib.dlr.de/129354/
Document Type:Article
Title:Layered composite membranes based on porous PVDF coated with a thin, dense PBI layer for vanadium redox flow batteries
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Lee, WonmiSeoul National University of Science and TechnologyUNSPECIFIED
Jung, MinaCenter for Hydrogen and Fuel Cell Research, KISTUNSPECIFIED
Serhiichuk, DmytroCenter for Hydrogen and Fuel Cell Research, KISTUNSPECIFIED
Noh, ChanhoSeoul National University of Science and TechnologyUNSPECIFIED
Gupta, Gauravgaurav.gupta (at) dlr.deUNSPECIFIED
Harms, Corinnacorinna.harms (at) dlr.dehttps://orcid.org/0000-0001-5916-3224
Kwon, YongchaiSeoul National University of Science and TechnologyUNSPECIFIED
Henkensmeier, Dirkhenkensmeier (at) kist.re.krUNSPECIFIED
Date:1 August 2019
Journal or Publication Title:Journal of Membrane Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:591
DOI :10.1016/j.memsci.2019.117333
Page Range:p. 117333
Publisher:Elsevier
ISSN:0376-7388
Status:Published
Keywords:Porous PVDF, Polybenzimidazole blocking layer, Composite membranes, Vanadium redox flow batteries
HGF - Research field:Energy
HGF - Program:Technology, Innovation and Society
HGF - Program Themes:Renewable Energy and Material Resources for Sustainable Futures - Integrating at Different Scales
DLR - Research area:Energy
DLR - Program:E SY - Energy Systems Analysis
DLR - Research theme (Project):E - Energy Systems Technology (old)
Location: Oldenburg
Institutes and Institutions:Institute of Networked Energy Systems > Fuel Cells
Deposited By: Lorenz, Julian
Deposited On:28 Oct 2019 17:44
Last Modified:09 Apr 2020 12:18

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