Novel Alkaline Anion-exchange Membranes Based on Chitosan/Ethenylmethylimidazoliumchloride Polymer with Ethenylpyrrolidone Composites for Low Temperature Polymer Electrolyte Fuel Cells

Song, Feifei; Fu, Youxin; Gao, Ying; Li, Jiadong; Qiao, Jinli; Zhou, Xiao Dong; Liu, Yuyu

doi:10.1016/j.electacta.2015.02.015

Cited by 48 publications

(24 citation statements)

References 42 publications

(48 reference statements)

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“…From Figure A‐D, it is clear that all the membranes show good adhesion at interfaces and are generally homogeneous without obviously cracks, micro‐voids, and shallow folded cavities. This uniform distribution structure is significantly different from our previous CS‐based blending systems . Phase separation phenomena in those membranes may lead to a relatively loose structure and are favorable to the establishment of ionic transfer channels, but also may bring negative effect on mechanical properties due to the easy formation of the structural flaws.…”

Section: Resultscontrasting

confidence: 57%

“…As summarized in Figure , the IEC values of the CS series film increase from 0.92 to 2.27 mequiv g −1 with the increase of the PUB content from 1:0.5:0 (CS:PAADDA:PUB) to 1:0.5:1, but the growth rate starts to flatten when the ratio of CS:PAADDA:PUB reaches 1:0.5:0.75. It is very interesting to find that the very high IEC values of the CS series membranes are superior to our previously reported AEMs . The two main reasons for the improved IEC values with the increase of the PUB content are as follows: First, PUB contains two quaternized groups in each chain segment, which results in doubling the quaternized groups in the membrane with the increase of PUB.…”

Section: Resultsmentioning

confidence: 74%

“…However, the adding of PUB may partly impair the inner combination force among the macromolecules in the membrane, so its oxidative stability is slightly inferior to that of CS/PAADDA membrane and PVA/PDDA which we reported previously. However, the CS/PAADDA/PUB (1:0.5:0.5) membrane shows better oxidative stability than that of some other CS‐based membranes . These membranes were damaged significantly in the H 2 O 2 (30 wt%) solution at room temperature in a short time, showed noticeable degradation after being treated by Fenton's reagent solution or were even easily dissolved in hot water.…”

Section: Resultsmentioning

confidence: 99%

“…With the rise of AEMs research, CS reattracts people's attention for its excellent alkaline stability. Although the pristine CS membrane shows a certain ability to conduct ions, its conductivity value is too low to support the effective operation of alkaline fuel cells (AFC), so it is necessary to carry out quaternarization modification and many researchers have made lots of exploration in this area . Ryu et al synthesized a quaternized CS‐based membrane with 4‐pyridinecarboxaldehyde and 1‐vinylimidzaole.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultscontrasting

confidence: 57%

Section: Resultsmentioning

confidence: 74%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

2019

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“…The membrane was prepared by a simple solution-casting method as we have reported elsewhere [6,7]. 2 g chitosan (CS) was first dissolved into 100ml of 5% aqueous solution of acetic acid.…”

Section: Methodsmentioning

confidence: 99%

Anion conducting chitosan/poly[(3-methyl-1-vinylimidazolium methyl sulfate)-co-(1-vinylcaprolactam)-co-(1-vinylpyrrolidone)] membrane for alkaline anion-exchange membrane fuel cells

Wei²,

Hou³

et al. 2017

Proceedings of the 2017 6th International Conference on Energy, Environment and Sustainable Development (ICEESD 2017)

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Abstract.Anion-exchange membrane composed of chitosan (CS) and poly [(3-methyl-1-vinylimidazolium methyl sulfate)-co-(1-vinylcaprolactam)-co-(1-vinylpyrrolidone)] (PMVMS-co-VC-co-VP) was prepared by applying double cross-linking technique for alkaline membrane fuel cell (AMFC). Having tested the ion conductivity and water uptake without thermal cross-linking, the CS/PMVMS-co-VC-co-VP-OH -membrane (1:0.75 by mass) shows the ionic conductivity of 1.39 × 10 -3 S cm -1 with high water uptake of 88.45%.However, when the membrane was double cross-linked by both thermal and chemical cross-linking, the ionic conductivity of the membrane was improved and reached to 1.58×10 -3 S cm -1 , instead, the water uptake of the membrane was largely decreased to lower than 48.02%. The oxidation stability of the membrane was also enhanced greatly. Moreover, the ionic conductivity increases as the temperature increased; with the maximum OH -conductivity of 3.85×10 -3 S cm -1 was obtained at 80 o C.

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Poly(vinyl alcohol) modified by KE reactive dyes as a novel proton‐exchange membrane for potential fuel‐cell applications

Zhou

Xie

2015

J of Applied Polymer Sci

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A new type of proton-exchange membrane based on poly(vinyl alcohol) (PVA) modified KE reactive dyes (KE-4BD) was prepared and evaluated as H 1 -conducting polymer electrolytes. The effects of the content of KE-4BD on the membrane H 1 conductivity and water uptake were studied with an alternating-current impedance technique and the method of weighing, respectively. Fourier transform infrared and scanning electron microscopy were used for the chemical and structural characterization of these membranes. With all of these properties, the optimal mass ratio between PVA and KE-4BD was 1:0.5, and the resulting membrane exhibited a high proton conductivity (0.109 S/cm) at room temperature; this afforded a power density of 83.9 mW/cm 2 at 210.4 mA/ cm 2 and an open-circuit voltage of 810.8 mV. The PVA/KE-4BD membranes showed a high oxidative stability in Fenton's reagent (3% H 2 O 2 v/v, 2 ppm FeSO 4 ). Thermal analysis also showed that the membranes exhibited a significant improvement in thermal stability.

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Novel Alkaline Anion-exchange Membranes Based on Chitosan/Ethenylmethylimidazoliumchloride Polymer with Ethenylpyrrolidone Composites for Low Temperature Polymer Electrolyte Fuel Cells

Cited by 48 publications

References 42 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 conducting chitosan/poly[(3-methyl-1-vinylimidazolium methyl sulfate)-co-(1-vinylcaprolactam)-co-(1-vinylpyrrolidone)] membrane for alkaline anion-exchange membrane fuel cells

Poly(vinyl alcohol) modified by KE reactive dyes as a novel proton‐exchange membrane for potential fuel‐cell applications

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