Issue 35, 2013
From the journal:

RSC Advances

Layer-by-layer self-assembly of PDDA/PSS-SPFEK composite membrane with low vanadium permeability for vanadium redox flow battery

Yufei Wang,a   Shuanjin Wang,*a   Min Xiao,a   Dongmei Han,a   Michael A. Hicknerb  and  Yuezhong Meng*a  

* Corresponding authors

a The Key Laboratory of Low-carbon Chemistry & Energy Conservation of Guangdong Province, State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou 510275, PR China
E-mail: mengyzh@mail.sysu.edu.cn, wangshj@mail.sysu.edu.cn
Fax: +86 20 84114113
Tel: +86 20 84115506

b Department of Materials Science and Engineering, the Pennsylvania State University, University Park, PA 16802, USA

Abstract

Sulfonated poly(fluorenyl ether ketone) (SPFEK) membranes have been first modified by layer-by-layer (LbL) self-assembly of positively charged polyelectrolyte PDDA (poly(diallyldimethylammonium chloride)) and negatively charged PSS (poly(sodium styrene sulfonate)). The membranes were investigated as an ion exchange membrane for vanadium redox flow batteries (VRBs). The permeability of the vanadium ions in VRBs was effectively suppressed by depositing the LbL thin film on the SPFEK membrane. The permeability decreased with increasing the number of PDDA/PSS bilayers. For the membrane with two self-assembly bilayers of PDDA/PSS, 50% and 10% of vanadium ion permeability of a pristine SPFEK and Nafion 117 membranes can be afforded, respectively. Moreover, the oxidative stability of the PDDA/PSS-SPFEK composite membrane is improved remarkably compared with the pristine one. Consequently, the performance of VRBs using the PDDA/PSS-SPFEK composite membrane exhibits the highest coulombic efficiency (CE) of 82.1% at 30 mA cm−2 and the longest duration stability in the self-discharge test.

Graphical abstract: Layer-by-layer self-assembly of PDDA/PSS-SPFEK composite membrane with low vanadium permeability for vanadium redox flow battery

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Article information

DOI
https://doi.org/10.1039/C3RA41670D
Article type
Paper
Submitted
08 Apr 2013
Accepted
25 Jun 2013
First published
27 Jun 2013

RSC Adv., 2013,3, 15467-15474

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Layer-by-layer self-assembly of PDDA/PSS-SPFEK composite membrane with low vanadium permeability for vanadium redox flow battery

Y. Wang, S. Wang, M. Xiao, D. Han, M. A. Hickner and Y. Meng, RSC Adv., 2013, 3, 15467 DOI: 10.1039/C3RA41670D

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