Highly Conductive and Dimensionally Stable Anion Exchange Membranes Based on Poly(dimethoxybenzene-<i>co</i>-methyl 4-formylbenzoate) Ionomers

Zhu, Hairong; Sun, Zhe; Cao, Huixing; Wang, Bowen; Zhao, Junliang; Pan, Ji Sheng; Xu, Guodong; Jin, Zhiyu; Yan, Feng

doi:10.1021/acs.macromol.1c00704

Cited by 26 publications

(20 citation statements)

References 52 publications

(86 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Chemical stability, particularly alkaline stability, is another crucial factor to be considered for AEMs . All polyfluorene/PVBC cross-linked AEMs exhibited excellent alkaline stability even after treatment with 2 M KOH at 80 °C for 30 days.…”

Section: Resultsmentioning

confidence: 99%

“…Chemical stability, particularly alkaline stability, is another crucial factor to be considered for AEMs. 48 All polyfluorene/PVBC cross-linked AEMs exhibited excellent alkaline stability even after treatment with 2 M KOH at 80 °C for 30 days. The demonstration of this stability was attributed to the ether-free polymer structure and successful cross-linked structure (Figure 7).…”

Section: Iec Wu and Srmentioning

confidence: 94%

See 1 more Smart Citation

Polyfluorene/Poly(vinylbenzyl chloride) Cross-Linked Anion-Exchange Membranes with Multiple Cations for Fuel Cell Applications

Chen

et al. 2022

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

An ideal anion-exchange membrane (AEM) must possess good dimensional stability, excellent alkaline stability, and good ionic conductivity. In this study, polyfluorene/poly-(vinylbenzyl chloride) (PVBC) cross-linked AEMs with multiple cations are prepared. A cross-linked structure is introduced to enhance the mechanical strength (>30 MPa) and dimensional stability (swelling ratio < 15%) of these AEMs. All PHF x TP 100−x − PVBC-and PMF x TP 100−x −PVBC-based AEMs exhibit excellent alkaline stability after treating with 2 M KOH at 80 °C for 30 days, which is attributed to the ether-free backbone and cross-linked structure. The long hydrophobic alkyl side chains of PHF 10 TP 90 − PVBC favors the construction of microphase separation within the membrane, leading to higher conductivity and cell performance (64.56 mS cm −1 and 323 mW cm −2 , at 80 °C) than those of the PMF 10 TP 90 −PVBC (57.56 mS cm −1 and 100 mW cm −2 at 80 °C).The results indicate that polyfluorene/PVBC cross-linked AEMs with multiple cations are prospective membrane materials for fuel cells.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Iec Wu and Srmentioning

confidence: 94%

Polyfluorene/Poly(vinylbenzyl chloride) Cross-Linked Anion-Exchange Membranes with Multiple Cations for Fuel Cell Applications

Chen

et al. 2022

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

“…The size of the sample membranes was 1 cm × 5 cm. We tested the resistance of the sample membranes in the frequency range of 1 Hz to 100 MHz 24,25 . The formula for calculating the ionic conductivity ( σ ) was as follows:

σ goodbreak= \frac{L}{R \times S}

where, σ (S/cm) is the ionic conductivity, R (Ω) is the resistance of the membrane, L (cm) is the distance between the electrodes, and S (cm 2 ) is the cross‐sectional area of the membrane.…”

Section: Experimetalmentioning

confidence: 99%

“…We tested the resistance of the sample membranes in the frequency range of 1 Hz to 100 MHz. 24,25 The formula for calculating the ionic conductivity (σ) was as follows:…”

Section: Ionic Conductivitymentioning

confidence: 99%

A novel anion exchange membrane based on silicone/polyphenylene oxide with excellent ionic conductivity for AEMFC

Liu

Wang

Sui

et al. 2022

Polymers for Advanced Techs

View full text Add to dashboard Cite

To achieve good stability of anion‐exchange membranes. We report an organic–inorganic composite anion exchange membrane based on polyphenylene oxide (PPO) and 3‐[2‐(2‐aminoethylamino)ethylamino]propyl‐trimethoxysilane to improve dimensional stability and mechanical stability without affecting ionic conductivity. The successful synthesis of the membranes was confirmed by FT‐IR, 1H NMR, and EDX. The SiOSi three‐dimensional network cross‐linked structure was formed inside the anion‐exchange membranes by added inorganic fillers. It suppressed the swelling behavior of the membrane after water uptake, with water uptake rate of 48.2%–55.6% and swelling rate of 3.1%–14.2%. It improved the mechanical strength of the membranes with tensile strength of 33.5–37.8 MPa as the ratio of the membrane structure varied. Meanwhile, the flexible chain segments in the polymer structure contributed to the formation of microscopic phase separation structures, and the constructed ion‐conducting channels enabled QPPO‐Si‐5 to reach the highest hydroxide ion conductivity of 78.7 mS/cm at 80°C (ion exchange capacity [IEC] value of 1.2 mmol/g). QPPO‐Si‐1 exhibited better long‐term chemical stability, retaining 48.3% of the initial conductivity (30.8 mS/cm) after 600 h of alkali stability testing at 80°C in 1 M KOH solution. In conclusion, the results of this study provide a facile synthetic strategy with improved membrane's comprehensive performance.

show abstract

“…Generally, improving the conductivity of the membrane is achieved by increasing the ion exchange capacity (IEC). However, a high IEC usually results in high water absorption and expansion, which significantly reduce the mechanical properties and dimensional stability of AEMs. − Therefore, it is necessary to further explore a new type of AEMs with high ionic conductivity and the ability to effectively solve the “trade-off” problem.…”

Section: Introductionmentioning

confidence: 99%

Polymer Electrolyte Membranes from Microporous Troger’s Base Polymers for Fuel Cells

Yuan

Dong

et al. 2021

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Fuel cells (FCs) have attracted much attention because of their high energy conversion efficiency and cleanliness. However, polyelectrolytes are a key component of FCs, and their cost and performance are not ideal at present, which is an obstacle to the development of FCs. Polymers of intrinsic microporosity (PIM) have attracted much attention as a class of membrane materials due to their three-dimensional pore structure, which can provide channels for ion transport. However, it remains challenging to prepare PIM membranes due to their poor solubility and brittleness. A novel soluble Troger’s base (TB)-PIM polymer is proposed in this paper. The prepared TB-based membranes with rigid and contorted backbones exhibit excellent dimensional stability (<8% swelling ratio at 60 °C), mechanical properties, and thermal stability and form subnanometer cavities to allow rapid ion transport. Therefore, the proton conductivity of the 4-(2-hydroxyethoxy)-1,3-phenylenediamine dihydrochloride (HEPD)/4,4′-diamine-3,3′-dimethyl-biphenyl (DMBP)-TB membrane is 58.3 mS/cm at 80 °C. The OH– conductivity of the HEPD/DMBP-QTB anion exchange membrane (AEM) is 105.9 mS/cm at 80 °C. Moreover, the single cell assembled with an HEPD/DMBP-QTB AEM showed a peak power density of 76.6 mW/cm2 in H2 air (CO2-free) at 60 °C.

show abstract

Highly Conductive and Dimensionally Stable Anion Exchange Membranes Based on Poly(dimethoxybenzene-co-methyl 4-formylbenzoate) Ionomers

Cited by 26 publications

References 52 publications

Polyfluorene/Poly(vinylbenzyl chloride) Cross-Linked Anion-Exchange Membranes with Multiple Cations for Fuel Cell Applications

Polyfluorene/Poly(vinylbenzyl chloride) Cross-Linked Anion-Exchange Membranes with Multiple Cations for Fuel Cell Applications

A novel anion exchange membrane based on silicone/polyphenylene oxide with excellent ionic conductivity for AEMFC

Polymer Electrolyte Membranes from Microporous Troger’s Base Polymers for Fuel Cells

Contact Info

Product

Resources

About