Enhanced proton conductivity under low humidity of sulfonated poly(ether ether ketone) composite membrane enabled by multifunctional phosphonic acid polymeric submicrocapsules

Nie, Lihai; Dong, Hao; Han, Xi; He, Guangwei; Wu, Hong; Jiang, Zhongyi

doi:10.1016/j.jpowsour.2013.04.009

Cited by 15 publications

(17 citation statements)

References 41 publications

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“…Similar to cytoplasm, IL is a kind of organic liquid that contains ions, and therefore PMCs might be promising fillers for IL storage. In addition, the shell of PMC can be easily functionalized by acidic groups or basic groups, generating strong interactions with ILs and meanwhile serving as proton conduction sites [22]. Recently, polymeric microcapsules have been successfully employed to enhance the water retention properties of composite materials [23,24].…”

Section: Introductionmentioning

confidence: 99%

Polyelectrolyte microcapsules as ionic liquid reservoirs within ionomer membrane to confer high anhydrous proton conductivity

Zhang

et al. 2015

Journal of Power Sources

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Section: Introductionmentioning

confidence: 99%

Polyelectrolyte microcapsules as ionic liquid reservoirs within ionomer membrane to confer high anhydrous proton conductivity

Zhang

et al. 2015

Journal of Power Sources

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“…Monomer 1 showed absorbance at 1022 and 957 cm −1 that belonged to the asymmetric stretching of the POC group in FTIR . The peak at 1215 cm −1 corresponded to PO stretching . Monomer 2 showed characteristic peak of epoxy at 912 cm −1 , and the peak at 1725 cm −1 was attributed to CO of the ester group .…”

Section: Resultsmentioning

confidence: 98%

“…). Monomer 1 showed absorbance at 1022 and 957 cm −1 that belonged to the asymmetric stretching of the POC group in FTIR . The peak at 1215 cm −1 corresponded to PO stretching .…”

Section: Resultsmentioning

confidence: 99%

Phosphonated homopolymers and copolymers via ring opening metathesis polymerization: T _g tuning, flame resistance, and photolithography

Zhang

Xie

et al. 2015

J. Polym. Sci. Part A: Polym. Chem.

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Phosphonated and epoxy‐containing norbornene based monomers were prepared by Diels–Alder reaction. They were then combined with three other commercial cyclic unsaturated monomers to synthesize phosphonated homopolymers and copolymers via ring opening metathesis polymerization (ROMP) using second‐generation Grubbs catalyst. Glass transitions of these polymers were tunable in a broad range from −14 to 91 °C by varying the flexibility of comonomer. Interestingly, copolymerization with cyclopentene inhibited the crystallization of polycyclopentene, and instead, led to a copolymer with two Tgs. Paradoxically, results from thermogravimetric analysis (TGA) were not consistent with the followed flame‐retarding experiment, implying that the early weight loss from phosphonated moieties did not deleteriously affect the flame‐resistant property which actually depended more on the percentage of char residual after thermal degradation. In application studies, the norbornene derivative phosphonated polymer was tested for the first time as flame retarding material, and showed significant self‐extinguishing ability. In a second study, photolithography was also successfully performed via thiol‐ene “click” chemistry, which allowed the phosphonated polymer a promising negative photoresist. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2016, 54, 1396‐1408

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“…Polar and proton‐conductive acidic or basic groups can crosslink or functionalise the shell. The shell plays a crucial role in keeping water in the bound state or switching water from the free state to the bound state, simultaneously confining water molecules to reduce the chemical potential via curvature‐related effects . Water release can be reduced by this phenomenon.…”

Section: Organic‐inorganic Polymer Composite Pemsmentioning

confidence: 99%

Non‐Fluorinated Polymer Composite Proton Exchange Membranes for Fuel Cell Applications – A Review

2019

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The critical component of a proton exchange membrane fuel cell (PEMFC) system is the proton exchange membrane (PEM). Perfluorosulfonic acid membranes such as Nafion are currently used for PEMFCs in industry, despite suffering from reduced proton conductivity due to dehydration at higher temperatures. However, operating at temperatures below 100 °C leads to cathode flooding, catalyst poisoning by CO, and complex system design with higher cost. Research has concentrated on the membrane material and on preparation methods to achieve high proton conductivity, thermal, mechanical and chemical stability, low fuel crossover and lower cost at high temperatures. Non‐fluorinated polymers are a promising alternative. However, improving the efficiency at higher temperatures has necessitated modifications and the inclusion of inorganic materials in a polymer matrix to form a composite membrane can be an approach to reach the target performance, while still reducing costs. This review focuses on recent research in composite PEMs based on non‐fluorinated polymers. Various inorganic fillers incorporated in the PEM structure are reviewed in terms of their properties and the effect on PEM fuel cell performance. The most reliable polymers and fillers with potential for high temperature proton exchange membranes (HTPEMs) are also discussed.

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Enhanced proton conductivity under low humidity of sulfonated poly(ether ether ketone) composite membrane enabled by multifunctional phosphonic acid polymeric submicrocapsules

Cited by 15 publications

References 41 publications

Polyelectrolyte microcapsules as ionic liquid reservoirs within ionomer membrane to confer high anhydrous proton conductivity

Polyelectrolyte microcapsules as ionic liquid reservoirs within ionomer membrane to confer high anhydrous proton conductivity

Phosphonated homopolymers and copolymers via ring opening metathesis polymerization: T _g tuning, flame resistance, and photolithography

Non‐Fluorinated Polymer Composite Proton Exchange Membranes for Fuel Cell Applications – A Review

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Enhanced proton conductivity under low humidity of sulfonated poly(ether ether ketone) composite membrane enabled by multifunctional phosphonic acid polymeric submicrocapsules

Cited by 15 publications

References 41 publications

Polyelectrolyte microcapsules as ionic liquid reservoirs within ionomer membrane to confer high anhydrous proton conductivity

Polyelectrolyte microcapsules as ionic liquid reservoirs within ionomer membrane to confer high anhydrous proton conductivity

Phosphonated homopolymers and copolymers via ring opening metathesis polymerization: T g tuning, flame resistance, and photolithography

Non‐Fluorinated Polymer Composite Proton Exchange Membranes for Fuel Cell Applications – A Review

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Phosphonated homopolymers and copolymers via ring opening metathesis polymerization: T _g tuning, flame resistance, and photolithography