TY - JOUR
T1 - Directly fluorinated polyaromatic composite membranes for vanadium redox flow batteries
AU - Chen, Dongyang
AU - Hickner, Michael A.
AU - Wang, Shuanjin
AU - Pan, Jingjing
AU - Xiao, Min
AU - Meng, Yuezhong
N1 - Funding Information:
The authors would like to thank the China High-Tech Development 863 Program (Grant no. 2007AA03Z217 ), the Guangdong Province Sci & Tech Bureau (Key Strategic Project Grant nos. 2003C105004 , 2006A10704004 , and 2006B12401006 ), and the Guangzhou Sci & Tech Bureau (no. 2005U13D2031 ) for financial support of this work.
PY - 2012/10/1
Y1 - 2012/10/1
N2 - Fluorinated sulfonated poly(fluorenyl ether ketone) (F-SPFEK) membranes and composites with 3-aminopropyltriethoxylsilane (F-SPFEK-APTES) were prepared for evaluation in vanadium redox flow battery (VRB) devices. Improved oxidative stability as well as increased water uptake and proton conductivity were found after direct fluorination of a sulfonated poly(fluorenyl ether ketone) (SPFEK) sample with fluorine gas. The incorporation of a polysilsesquioxane network within the fluorinated membrane effectively suppressed vanadium permeation without a large decrease in proton conductivity, leading to a membrane with a more optimized balance of proton conductivity and VO 2+ permeability for good VRB performance. Both F-SPFEK and F-SPFEK-APTES membranes showed promising characteristics for VRB application, but the coulombic efficiency of the VRB with the F-SPFEK-APTES composite membrane was 21.5% higher than the VRB with a SPFEK membrane.
AB - Fluorinated sulfonated poly(fluorenyl ether ketone) (F-SPFEK) membranes and composites with 3-aminopropyltriethoxylsilane (F-SPFEK-APTES) were prepared for evaluation in vanadium redox flow battery (VRB) devices. Improved oxidative stability as well as increased water uptake and proton conductivity were found after direct fluorination of a sulfonated poly(fluorenyl ether ketone) (SPFEK) sample with fluorine gas. The incorporation of a polysilsesquioxane network within the fluorinated membrane effectively suppressed vanadium permeation without a large decrease in proton conductivity, leading to a membrane with a more optimized balance of proton conductivity and VO 2+ permeability for good VRB performance. Both F-SPFEK and F-SPFEK-APTES membranes showed promising characteristics for VRB application, but the coulombic efficiency of the VRB with the F-SPFEK-APTES composite membrane was 21.5% higher than the VRB with a SPFEK membrane.
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U2 - 10.1016/j.memsci.2012.04.048
DO - 10.1016/j.memsci.2012.04.048
M3 - Article
AN - SCOPUS:84864743915
SN - 0376-7388
VL - 415-416
SP - 139
EP - 144
JO - Journal of Membrane Science
JF - Journal of Membrane Science
ER -