RT Journal Article
T1 Proton-exchange membranes based on sulfonated poly(ether ether ketone)/polyaniline blends for all- and air-vanadium redox flow battery applications
A1 David, Oana
A1 Percin, Korcan
A1 Luo, Tao
A1 Gendel, Youri
A1 Wessling, Matthias
AB Thin and mechanically stable proton-exchange membranes with high V(IV) barrier properties and good proton conductivity have been fabricated by polymer blending of sulfonated poly(ether ether ketone) with polyaniline. V(IV) diffusion coefficient of blended membranes in a wt. ratio of 80/20 was 2.6 and 6 times lower than for pure sulfonated poly(ether ether ketone) and Nafion 112 membrane, respectively. This behaviour is assumed to be caused by a densified polymer matrix given by acid/base interactions between the two polymers. Blended membranes in a wt. ratio of 80/20 had a good proton conductivity of 54.15mScm-1 and ion exchange capacity of 1.44mmolg-1. The membranes were also characterized in all-vanadium redox flow battery, where only slightly higher efficiencies were achieved than for pure polymer. Slow PANI degradation determines a decrease in membrane performance, reaching values close to the starting polymer (SPEEK-E600). Therefore, the application of blended membranes in the all-vanadium redox flow battery is not advantageous. However, the improved barrier properties are likely to be beneficial for their application in vanadium/air-redox flow battery in order to reduce oxygen crossover. In the latter, no V(V) ions can oxidize the blend polymer.
SN 2352-152X
YR 2015
FD 2015
LK https://hdl.handle.net/11556/3280
UL https://hdl.handle.net/11556/3280
LA eng
NO David , O , Percin , K , Luo , T , Gendel , Y & Wessling , M 2015 , ' Proton-exchange membranes based on sulfonated poly(ether ether ketone)/polyaniline blends for all- and air-vanadium redox flow battery applications ' , Journal of Energy Storage , vol. 1 , no. 1 , pp. 65-71 . https://doi.org/10.1016/j.est.2015.01.001
NO Publisher Copyright: © 2015 Elsevier Ltd.
NO This research was funded by the German Federal Ministry of Education and Research (BMBF) under the project Tubulair±. Prof. Matthias Wessling appreciates the financial support of the Alexander von Humboldt Foundation .
DS TECNALIA Publications
RD 31 jul 2024