Effect of degree of sulfonation and casting solvent on sulfonated poly(ether ether ketone) membrane for vanadium redox flow battery

Xi, Jingyu; Li, Zhaohua; Yu, Lihong; Yin, Bibo; Wang, Lei; Liu, Le; Qiu, Xinping; Chen, Liquan

doi:10.1016/j.jpowsour.2015.03.104

Cited by 172 publications

(96 citation statements)

References 49 publications

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“…The weight loss and vanadium permeability change of PS membranes are illustrated in Table . It shows that all the membranes have slight weight loss after being immersed in 1.5 mol L −

{VO}_{2}^{+}

solution for 3 weeks, which is because of the degradation of membrane backbone since the ‐SO 3 H group is stable . It can also be found that although the weight loss of PS/NMP membrane is over 2%, the weight loss of PS/DMAc and PS/DMF are both less than 2%, which is similar to that of recast Nafion membrane .…”

Section: Saxsmentioning

confidence: 71%

“…Among these membranes, sulfonated poly(ether ether ketone) (SPEEK) is considered to be the most promising alternative to Nafion membrane for its low cost, acceptable stability, and good electrochemical activity in VRB. Studies show that the properties of SPEEK membranes depend on the degree of sulfonation (DS), and higher proton conductivity can be obtained via prolonging sulfonation time and increasing temperature. However, with the increasing DS of the SPEEK, it could be easily dissolved in water and unfavorable for the membrane mechanical performance .…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, study by Xi et al . shows that the solvents used to prepare the SPEEK membranes have important effect on the performances of VRB …”

Section: Introductionmentioning

confidence: 99%

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A super thin polytetrafluoroethylene/sulfonated poly(ether ether ketone) membrane with 91% energy efficiency and high stability for vanadium redox flow battery

Dai

Teng

Song

et al. 2016

J of Applied Polymer Sci

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In order to further decrease the cost and enhance the durability of sulfonated poly(ether ether ketone) membrane for vanadium redox flow battery, a super thin (40 μm) polytetrafluoroethylene (PTFE)/SPEEK (PS) membrane is prepared. The physico‐chemical properties and single cell performance of PS membranes prepared with different casting solvents including NMP (N‐methyl‐2‐pyrrolidone), DMF (N,N′‐dimethylformamide), and DMAc (N,N′‐dimethylacetamide) have been investigated. Results show that the energy efficiency of VRB with PS/DMF can reach up to 91.2% at the current density of 40 mA cm−2, which is 11.1% and 6.4% higher than that of the commercial Nafion 212 and pristine SPEEK membrane, respectively. In addition, charge–discharge test over 150 times proves that the PS/DMF membrane possesses high stability and thus it is suitable for VRB application. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43593.

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“…The weight loss and vanadium permeability change of PS membranes are illustrated in Table . It shows that all the membranes have slight weight loss after being immersed in 1.5 mol L −

{VO}_{2}^{+}

Section: Saxsmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A super thin polytetrafluoroethylene/sulfonated poly(ether ether ketone) membrane with 91% energy efficiency and high stability for vanadium redox flow battery

Dai

Teng

Song

et al. 2016

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…The water uptake ( WU ) of membrane is a critical factor for VRFB application, because water molecules serve as proton transportation carriers responsible for the proton conductivity of membrane . In this regard, it is very important and necessary to increase WU as far as possible.…”

Section: Resultsmentioning

confidence: 99%

Fluorine‐Containing Branched Sulfonated Polyimide Membrane for Vanadium Redox Flow Battery Applications

et al. 2018

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A series of fluorine‐containing branched sulfonated polyimide (Fb‐SPI) membranes with different degrees of branching (0–12 %) were synthesized through polycondensation. The chemical structure of Fb‐SPI‐10 membrane was confirmed using ATR‐FTIR and 1H NMR spectroscopy. The physico‐chemical properties of Fb‐SPI membranes were systematically investigated and compared to linear SPI (l‐SPI) and Nafion 117 membranes. The vanadium‐ion permeabilities of Fb‐SPI membranes (2.45–0.99×10−7 cm2 min−1) are much lower than that of Nafion 117 (17.1×10−7 cm2 min−1) membranes. Besides, the chemical stability of Fb‐SPI membranes is superior to that of l‐SPI membranes. During 500‐time continuous cyclic charge‐discharge measurements, the VRFB assembled with a Fb‐SPI‐10 membrane shows higher coulombic efficiency (98.4–99.7 %), higher or close energy efficiency (69.0–79.7 %) from 40 to 80 mA cm−2, and higher or close capacity retention (52.8–100 %) from 40 to 70 mA cm−2 compared with a device using a Nafion 117 membrane. All of these results demonstrate that the as‐selected Fb‐SPI‐10 membrane has promising potential for VRFB applications.

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“…Importantly,the ability to tune the degree of sulfonation enabled the group to discover an optimal material that contained only 4.8 mol %lithium sulfonate. [68,72]…”

Section: Reviewsmentioning

confidence: 99%

C−H Functionalization of Commodity Polymers

et al. 2019

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Synthetic manipulation of polymer substrates is one of the oldest and most reliable methods to increase the functional diversity of soft materials. Modifying the chemical structure of polymers that are already produced on a commodity scale leverages the current high‐volume and low‐cost production of commodity plastics for the discovery of modern materials. A myriad of polymer C−H functionalization methods have been developed which enable the modification of material properties on both a laboratory and industrial scale. More recently, driven by advances in C−H activation, photoredox catalysis, and radical chemistry, chemoselective approaches have emerged as a means to impart precise functionality onto commodity polymer substrates. This Review discusses the historical significance of and contemporary advances in the C−H functionalization of commodity polymers. The conceptual approach outlined herein presents exciting new directions for the field, including increasing the value of otherwise pervasive materials, uncovering entirely new material properties, and a viable path to upcycle post‐consumer plastic waste.

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Effect of degree of sulfonation and casting solvent on sulfonated poly(ether ether ketone) membrane for vanadium redox flow battery

Cited by 172 publications

References 49 publications

A super thin polytetrafluoroethylene/sulfonated poly(ether ether ketone) membrane with 91% energy efficiency and high stability for vanadium redox flow battery

A super thin polytetrafluoroethylene/sulfonated poly(ether ether ketone) membrane with 91% energy efficiency and high stability for vanadium redox flow battery

Fluorine‐Containing Branched Sulfonated Polyimide Membrane for Vanadium Redox Flow Battery Applications

C−H Functionalization of Commodity Polymers

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