QPPO/Palygorskite Nanocomposite as an Anion Exchange Membrane for Alkaline Fuel Cell

Luo, Jun; Liu, Chunjing; Song, Yanhui; Cui, Peipei

doi:10.1080/00914037.2015.1030653

Cited by 9 publications

(4 citation statements)

References 29 publications

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“…The σ values at 80°C were thus increased from 17.6 to 23.0 and 28.5 mS/cm, respectively. The data were comparable with 38.4 mS/cm of 6BPAEK‐BIm 85 AIm 15 , 44 higher than 13.9 ± 0.7 mS/cm of QCNC/QPPO 16 and 21.5 mS/cm of QPPO/6%palygorskite, 43 lower than 69.6 mS/cm of x (QH)QPPO‐80 42 and 43 mS/cm of PPO/C 6 D 60 45 . Furthermore, the improvement on hydroxide conductivity stability would be illustrated in Section 3.10.…”

Section: Resultssupporting

confidence: 68%

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Enhancing anion conduction stability of quaternized poly(phenylene) oxide‐based anion exchange membranes with ionic liquids modified carbon nanomaterials

Wang

Zuo

Liu

et al. 2022

Intl J of Energy Research

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The anion exchange membrane (AEM) with high and stable conductivity is important to the commercial application of anion exchange membrane fuel cell. The AEM based on the polymer of quaternized poly(phenylene) oxide (QPPO) with enhanced anion conduction stability has been constructed through the introduction of the ionic liquid (IL) of 1-aminopropyl-3-methylimidazolium bromide (APMIMBr)-modified carbon nanomaterials, such as carbon nanotubes oxide (OCNT) and graphene oxide (GO) nanosheets.The IL-OCNT and IL-GO composites prevented hydroxyl groups from attacking the polymer of QPPO. Thus, QPPO/x(IL-OCNT) and QPPO/x(IL-GO) series membranes possessed enhanced hydroxide conductivity stability in alkaline solution. Specifically, QPPO/5%(IL-OCNT) and QPPO/5%(IL-GO) membranes exhibited the hydroxide conductivities of 23.0 and 28.5 mS/cm at 80 C. Notably, the hydroxide conductivities could reach 16.3 and 30.2 mS/cm while the prepared membranes were immersed in 2 M KOH solution for 1848 h. Furthermore, the stable hydroxide conductivity was derived from the fine dimension stability and mechanical property. The tensile stress values were, respectively, 19.4 and 19.8 MPa even if the membranes were immersed in alkaline solution. In the prepared QPPO/x(IL-OCNT) and QPPO/x(IL-GO) membranes,alkaline stability, anion exchange membrane, carbon nanotubes oxide, graphene oxide, ionic liquid, quaternized poly(phenylene) oxide

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Section: Resultssupporting

confidence: 68%

“…In general, a higher IEC resulted in a higher σ value although there was opposite situation. 43 The IEC value of QPPO membranes was increased from 1.15 to 2.23 mmol/g of QPPO/5%(IL-OCNT) and 2.14 mmol/g of QPPO/5%(IL-GO). The σ values at 80 C were thus increased from 17.6 to 23.0 and 28.5 mS/cm, respectively.…”

Section: Wu Ds Iec and Hydroxide Conductivitymentioning

confidence: 97%

Enhancing anion conduction stability of quaternized poly(phenylene) oxide‐based anion exchange membranes with ionic liquids modified carbon nanomaterials

Wang

Zuo

Liu

et al. 2022

Intl J of Energy Research

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“…After the membrane was washed three times with methanol, Br-PPO was obtained. Finally, Br-PPO was dried in a vacuum oven at 50 °C for 24 h. The degree of bromination was calculated as 34.72% based on the 1 H NMR spectrum (as shown in Figure S1) and eq S6 …”

Section: Methodsmentioning

confidence: 99%

Fabrication of Dual-Functional Bacterial-Cellulose-Based Composite Anion Exchange Membranes with High Dimensional Stability and Ionic Conductivity

Wang,

Qu,

Yang

et al. 2024

ACS Appl. Mater. Interfaces

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Anion exchange membranes (AEMs) are increasingly becoming a popular research area due to their ability to function with nonprecious metals in electrochemical devices. Nevertheless, there is a challenge to simultaneously optimize the dimensional stability and ionic conductivity of AEMs due to the "trade-off" effect. Herein, we adopted a novel strategy of combining filling and cross-linking using functionalized bacterial cellulose (PBC) as a dual-functional porous support and brominated poly(phenylene oxide) (Br-PPO) as the cross-linking agent and filler. The PBC nanofiber framework together with cross-linking can provide a reliable mechanical support for the subsequent filled polymer, thus improving the mechanical properties and effectively limiting the size change of the final quaternized-PPO (QPPO)-filled PBC composite membrane. The composite membrane showed a very low swelling ratio of only 10.35%, even at a high water uptake (81.83% at 20 °C). Moreover, the existence of multiple −NR 3 + groups in the cross-link bonds between BC and Br-PPO can provide extra OH− ion transport sites, contributing to the increase in ionic conductivity. The final membrane demonstrated a hydroxide ion conductivity of 62.58 mS cm −1 , which was remarkably higher than that of the pure QPPO membrane by up to 235.93% (80 °C). The successful preparation of the PBC 3 /QPPO membrane provides an effective avenue to tackle the trade-off effect through a dual-functional strategy.

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“…Apart from increasing the IEC, construction of ion transport channels has been verified to be an efficient approach to promote ion conduction. The main methods include microphase separation, − interpenetrating polymer networks, − nanocomposites, − and so forth. As one of the most representative methods, microphase separation introduces a continuous phase which is functionalized with ion exchange groups, leading to high conductivity and good mechanical properties at low IEC.…”

Section: Introductionmentioning

confidence: 99%

Achieving High Conductivity at Low Ion Exchange Capacity for Anion Exchange Membranes with Electrospun Polyelectrolyte Nanofibers

Duan

Cheng

Zeng

et al. 2020

ACS Appl. Energy Mater.

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There has been a "trade-off" between ion exchange capacity (IEC) and mechanical properties in anion exchange membranes. Thinking out of the box, high ion conductivity was realized with only a small amount of ion exchange groups (means low IEC) in this work, by way of constructing highly effective ion channels with electrospun polyelectrolyte nanofibers. At a low IEC of 1.02 mmol g −1 , the conductivity of quaternized poly(2,6-dimethyl-1,4-phenylene oxide) nanofiber (QPPONF)/poly(vinyl alcohol) (QPPONF/PVA) composite membranes achieved was 51.5 mS cm −1 at 60 °C, which was much higher than that of the homogenous QPPO casting membrane (20.3 mS cm −1 at 60 °C, IEC = 1.04 mmol g −1 ). Moreover, 70 wt % QPPONF/PVA composite membrane exhibits an excellent peak power density of 791 mW cm −2 in the H 2 /O 2 fuel cell test.

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QPPO/Palygorskite Nanocomposite as an Anion Exchange Membrane for Alkaline Fuel Cell

Cited by 9 publications

References 29 publications

Enhancing anion conduction stability of quaternized poly(phenylene) oxide‐based anion exchange membranes with ionic liquids modified carbon nanomaterials

Enhancing anion conduction stability of quaternized poly(phenylene) oxide‐based anion exchange membranes with ionic liquids modified carbon nanomaterials

Fabrication of Dual-Functional Bacterial-Cellulose-Based Composite Anion Exchange Membranes with High Dimensional Stability and Ionic Conductivity

Achieving High Conductivity at Low Ion Exchange Capacity for Anion Exchange Membranes with Electrospun Polyelectrolyte Nanofibers

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