Directly fluorinated polyaromatic composite membranes for vanadium redox flow batteries

Dongyang Chen; Michael A. Hickner; Shuanjin Wang; Jingjing Pan; Min Xiao; Yuezhong Meng

doi:10.1016/j.memsci.2012.04.048

Directly fluorinated polyaromatic composite membranes for vanadium redox flow batteries

Dongyang Chen, Michael A. Hickner, Shuanjin Wang, Jingjing Pan, Min Xiao, Yuezhong Meng

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	139-144
Number of pages	6
Journal	Journal of Membrane Science
Volume	415-416
DOIs	https://doi.org/10.1016/j.memsci.2012.04.048
State	Published - Oct 1 2012

All Science Journal Classification (ASJC) codes

Biochemistry
General Materials Science
Physical and Theoretical Chemistry
Filtration and Separation

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10.1016/j.memsci.2012.04.048

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title = "Directly fluorinated polyaromatic composite membranes for vanadium redox flow batteries",

abstract = "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.",

author = "Dongyang Chen and Hickner, {Michael A.} and Shuanjin Wang and Jingjing Pan and Min Xiao and Yuezhong Meng",

note = "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.",

year = "2012",

month = oct,

day = "1",

doi = "10.1016/j.memsci.2012.04.048",

language = "English (US)",

volume = "415-416",

pages = "139--144",

journal = "Journal of Membrane Science",

issn = "0376-7388",

publisher = "Elsevier B.V.",

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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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JO - Journal of Membrane Science

JF - Journal of Membrane Science

ER -

Directly fluorinated polyaromatic composite membranes for vanadium redox flow batteries

Abstract

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