4-formyl dibenzo-18-crown-6 grafted polyvinyl alcohol as anion exchange membranes for fuel cell

Zheng, Xuying; Song, ShiYang; Yang, Jiarui; Wang, JiLin; Wang, Lulu

doi:10.1016/j.eurpolymj.2018.10.020

Cited by 34 publications

(13 citation statements)

References 41 publications

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σ_{{OH}^{-}}

values of the CS serials membranes at high temperature are close to those of the F20%‐P‐K membrane (0.02 S·cm −1 at 70°C), the quaternized poly (vinyl alcohol)/chitosan nanoparticle membrane (90/10; 0.0264 S·cm −1 at 60°C), the QCS/bi‐imidazolium‐based ionic liquid (15%) membrane (0.0419 S·cm −1 at 80°C), and are higher than those of the QPIENPC membrane (0.01015 S cm −1 at 80°C), the QCS100‐(PAM/PS) 0 membrane (0.015 S cm −1 at 80°C), the PVA‐PY‐DLx membranes (0.0105‐0.0274 S cm −1 at 70°C), but are beneath those of the PAEK‐MmOH‐30 membrane (0.0744 S cm −1 at 80°C), the BQH‐1.64 membrane (0.0728 S cm −1 at 80°C), the quaternized poly (benzimidazole imide)/poly (vinyl imidazole)/poly (vinyl benzyl chloride) membrane (0.117 S cm −1 at 80°C) . Therefore, although the CTS/PAADDA/PUB membrane has many advantages such as low manufacturing cost, ease of preparation, stable and good performance, it also needs to be investigated more deeply to further improve its OH − conductivity.…”

Section: Resultsmentioning

confidence: 66%

Application of a novel PUB enhanced semi‐interpenetrating chitosan‐based anion exchange membrane

2019

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Summary A novel OH− conducting membrane containing chitosan (CS), poly‐(acrylamide‐co‐diallyldimethylammonium chloride) (PAADDA) and linear structured poly‐bis (2‐chloroethyl) ether‐1,3‐bis [3‐(dimethylamino)propyl] urea copolymer (PUB) was synthesized via a solution‐casting method and subsequently modified by hot treatment and chemical cross‐linking. The structural characterizations of scanning electron microscope (SEM), atomic force microscope (AFM), Fourier transform infrared spectra (FT‐IR), and X‐ray photoelectron spectroscopy (XPS) were carried out, showing that CS, PAADDA, and PUB formed a compact interpenetrating polymer network structure without apparent phase separation phenomenon under the help of cross‐linking. By changing the content of PUB in the membrane, the application performance such as mechanical properties, thermal gravimetric (TG) analysis, water uptake (WU), OH− conductivity ( σOH−) and ion exchange capacity (IEC) were investigated to evaluate the feasibility for alkaline membrane fuel cells. The maximum OH− conductivity could be reached up to 3.12 × 10−2 S cm−1 at 80°C in a mass ratio of CS/PAADDA/PUB (1:0.5:0.5) while a good tensile strength of 22.73 MPa and an excellent elongation at break of 23.55% could be obtained in a mass ratio of CS/PAADDA/PUB (1:0.5:0.25). Furthermore, the membrane also exhibited relatively high oxidative stability as well as excellent alkaline resistance stability, when conditioned in 30% H2O2 solution at ambient temperature for 120 hours and 8 M KOH solution at 60°C for 320 hours, respectively. Membrane electrode assemblies (MEAs) achieved a peak power density of 38.1 mW cm−2 at the maximum current density of 73.2 mA cm−2 in a H2/O2 system at room temperature. PUB was successfully introduced into the CS‐based membrane to improve the conductivity. Maximum OH− conductivity reached 0.016 S cm−1 at room temperature. Tensile strength of the prepared membrane could reach up to 22.73 MPa. The prepared membrane exhibited an excellent elongation at break of 23.55%. The membrane showed good oxidative stability and excellent alkaline resistance stability.

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“…

σ_{{OH}^{-}}

Section: Resultsmentioning

confidence: 66%

Application of a novel PUB enhanced semi‐interpenetrating chitosan‐based anion exchange membrane

2019

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“…A measurable reduction in water uptake and swelling noticed when the QSiO 2 content is above 7 wt % due to the over dosage of the filler which inhibits chain mobility. The swelling percentage is relatively low [7–11% at room temperature (RT) and 11–22% at 80 °C], and taking the observation into account, membranes in this work are shown to be potentially attractive candidates in AEMs. − …”

Section: Results and Discussionmentioning

confidence: 94%

Anion Exchange Composite Membranes Composed of Quaternary Ammonium-Functionalized Poly(2,6-dimethyl-1,4-phenylene oxide) and Silica for Fuel Cell Application

Vijayakumar

Son

et al. 2021

ACS Omega

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Anion exchange membranes (AEMs) with good alkaline stability and ion conductivity are fabricated by incorporating quaternary ammonium-modified silica into quaternary ammonium-functionalized poly(2,6-dimethyl-1,4-phenylene oxide) (QPPO). Quaternary ammonium with a long alkyl chain is chemically grafted to the silica in situ during synthesis. Glycidyltrimethylammoniumchloride functionalization on silica (QSiO 2 ) is characterized by Fourier transform infrared and transmission electron microscopic techniques. The QPPO/QSiO 2 membrane having an ion exchange capacity of 3.21 meq·g –1 exhibits the maximum hydration number (λ = 11.15) and highest hydroxide ion conductivity of 45.08 × 10 –2 S cm –1 at 80 °C. In addition to the high ion conductivity, AEMs also exhibit good alkaline stability, and the conductivity retention of the QPPO/QSiO 2 -3 membrane after 1200 h of exposure in 1 M potassium hydroxide at room temperature is about 91% ascribed to the steric hindrance offered by the grafted long glycidyl trimethylammonium chain in QSiO 2 . The application of the QPPO/QSiO 2 -3 membrane to an alkaline fuel cell can yield a peak power density of 142 mW cm –2 at a current density of 323 mA cm –2 and 0.44 V, which is higher than those of commercially available FAA-3-50 Fumatech AEM (OCV: 0.91 V; maximum power density: 114 mW cm –2 at current density: 266 mA cm –2 and 0.43 V). These membranes provide valuable insights on future directions for advanced AEM development for fuel cells.

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“…With the increase of packing quantity to the best value, the more regular the crystal surface, the better the crystallinity. On the other hand, XRD curves slowly strengthen from QCS to MIL‐9‐QCS, the reason is that adding Cr‐MIL‐101 strengthens hydrogen bonding between QCS to influence the crystal structure of membranes 25 …”

Section: Resultsmentioning

confidence: 99%

Construction of ordered OH ⁻ migration channels in anion exchange membrane by synergizes of cationic metal‐organic framework and quaternary ammonium groups

Zeng

Wang

et al. 2021

Int J Energy Res

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Summary A series of anion exchange membranes (quaternized chitosan/cation metal‐organic framework [MIL‐X‐QCS]) were prepared via purposeful inserting the cationic metal‐organic framework as the multifunctional filler into quaternized chitosan (QCS). The successful preparation of the anion exchange membrane was confirmed by X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FT‐IR), and Scanning electron microscope (SEM). In this research, we converted the charge‐balanced MOFs skeleton Cr‐MIL‐101 into the cationic metal skeleton (Cr‐MIL‐101)+Cl− by anion stripping, and cooperated with quaternary amine groups to construct a high‐speed OH− transmission channel. The introduction of a rigid MOF structure reduces the water uptake and swelling ratio of the composite membrane by 27% and 37%, respectively. At 80°C, the OH− conductivity of the MIL‐9‐QCS membrane (The composite membrane doped with 9 wt% Cr‐MIL‐101 crystals) reaches 2.30 × 10−2 S·cm−1 and the power density reached its maximum (90.2 mW·cm−2), and the tensile strength reaches 20.12 MPa, which was higher than 18.7 MPa of Nafion‐115 membrane. The spatial network structure of MOFs reduced the methanol permeability of MIL‐9‐QCS membrane by 24% compared with the original QCS membrane. Furthermore, the MIL‐9‐QCS composite membrane exhibited excellent alkali stability, where after being soaked in 2 mol L−1 NaOH solution at 60°C for 240 hours, its OH− conductivity still reached 77% of the initial value.

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4-formyl dibenzo-18-crown-6 grafted polyvinyl alcohol as anion exchange membranes for fuel cell

Cited by 34 publications

References 41 publications

Application of a novel PUB enhanced semi‐interpenetrating chitosan‐based anion exchange membrane

Application of a novel PUB enhanced semi‐interpenetrating chitosan‐based anion exchange membrane

Anion Exchange Composite Membranes Composed of Quaternary Ammonium-Functionalized Poly(2,6-dimethyl-1,4-phenylene oxide) and Silica for Fuel Cell Application

Construction of ordered OH ⁻ migration channels in anion exchange membrane by synergizes of cationic metal‐organic framework and quaternary ammonium groups

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4-formyl dibenzo-18-crown-6 grafted polyvinyl alcohol as anion exchange membranes for fuel cell

Cited by 34 publications

References 41 publications

Application of a novel PUB enhanced semi‐interpenetrating chitosan‐based anion exchange membrane

Application of a novel PUB enhanced semi‐interpenetrating chitosan‐based anion exchange membrane

Anion Exchange Composite Membranes Composed of Quaternary Ammonium-Functionalized Poly(2,6-dimethyl-1,4-phenylene oxide) and Silica for Fuel Cell Application

Construction of ordered OH − migration channels in anion exchange membrane by synergizes of cationic metal‐organic framework and quaternary ammonium groups

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Construction of ordered OH ⁻ migration channels in anion exchange membrane by synergizes of cationic metal‐organic framework and quaternary ammonium groups