Hydroxide conducting polymerized ionic liquid pentablock terpolymer anion exchange membranes with methylpyrrolidinium cations

Meek, Kelly M.; Sun, Rui; Willis, Carl; Elabd, Yossef A.

doi:10.1016/j.polymer.2017.11.050

Cited by 25 publications

(24 citation statements)

References 29 publications

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“…Apart from these observations in the triblock terpolymers, recently much attention focuses on exploring novel self‐assembly structures by extending the block numbers, designing the block sequences and varying the compositions on the linear block chains. [ 8–13,16–18,56–68 ] One particularly interesting extension of a linear ABC triblock copolymer is the symmetric ABCBA pentablock terpolymer. This class of multiblock copolymers could exhibit rich self‐assembly behaviors and enhance mechanical properties of the material.…”

Section: Introductionmentioning

confidence: 99%

Self‐Assembly of Nonfrustrated ABCBA Linear Pentablock Terpolymers

Chang

Liu

et al. 2021

Macro Theory & Simulations

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The effects of compositions, interaction parameters, and number of blocks on the self‐assembly of nonfrustrated ABCBA linear pentablock terpolymer melts are investigated and compared with the corresponding ABC linear triblock terpolymers using the self‐consistent field theory. For the case of symmetric interaction parameters (χABN = χBCN) and majority B‐blocks, both ABC triblocks and ABCBA pentablocks can form intriguing A‐ and C‐domains embedded in the B‐matrix. While these morphologies persist in the ABC systems when the segregation strength is decreased, the A blocks tend to mix with the B blocks in the ABCBA pentablocks due to the chain topology, resulting in the formation of C‐domains embedded in the AB‐mixed matrix. Different phase behavior is observed for the case of asymmetric interaction parameters (χABN < χBCN). Aside from the core–shell type structures, a number of morphologies arise due to the separation between C and AB‐mixed domains in ABCBA pentablock copolymers. The theoretical results not only capture the self‐assembling behavior of poly(isoprene‐b‐styrene‐b‐ethylene oxide‐b‐styrene‐b‐isoprene) pentablocks, but also provide concrete suggestions for designing diverse microstructures in the linear ABC‐type terpolymers.

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Section: Introductionmentioning

confidence: 99%

Self‐Assembly of Nonfrustrated ABCBA Linear Pentablock Terpolymers

Chang

Liu

et al. 2021

Macro Theory & Simulations

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“…Interestingly, all of the AEMs in this review contained trimethylammonium cations (the most ubiquitous cation in AEM literature), which is unstable in alkaline media [7]. Thus, there is motivation to explore fuel cell stability with AEMs which contain alternative cations, such as pyrrolidinium cations [7][8][9][10][11][12][13] or piperidinium cations [9,10,12,[14][15][16]. Recently, Ponce-Gonzalez et al [10] demonstrated that radiation-grafted ETFE films with methylpyrrolidinium cations are more stable than films with trimethlyammonium cations.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, Ertem et al [25] characterized a commercially available multiblock polymer (pentablock terpolymer) containing trimethylammonium cations showing low water uptake (22 wt.% at 60°C, 95% RH) and high bromide ion conductivity (57 mS cm -1 at 90°C, 95% RH). Moreover, Meek et al [8] characterized a similar pentablock terpolymer containing methylpyrrolidinium cations and reported excellent alkaline stability (0% conductivity loss after 168 h in 1M KOH at 60°C). However, to date, there are no AEMFC performance results on this pentablock terpolymer as an AEM.…”

Section: Introductionmentioning

confidence: 99%

“…Interestingly, all of the AEMs in this review contained trimethylammonium cations (the most ubiquitous cation in AEM literature), which is unstable in alkaline media . Thus, there is motivation to explore fuel cell stability with AEMs which contain alternative cations, such as pyrrolidinium cations or piperidinium cations , , , . Recently, Ponce‐Gonzalez et al.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, Meek et al. characterized a similar pentablock terpolymer containing methylpyrrolidinium cations and reported excellent alkaline stability (0% conductivity loss after 168 h in 1M KOH at 60 °C). However, to date, there are no AEMFC performance results on this pentablock terpolymer as an AEM.…”

Section: Introductionmentioning

confidence: 99%

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Solid‐State Alkaline Fuel Cell Performance of Pentablock Terpolymer with Methylpyrrolidinium Cations as Anion Exchange Membrane and Ionomer

Hwang

Sun

Willis³

et al. 2020

Fuel Cells

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In this study, pentablock terpolymers with methylpyrrolidinium cations were characterized and investigated as anion exchange membranes and ionomers for solid-state alkaline fuel cells. The pentablock terpolymer (with methylpyrrolidinium cations) membranes exhibited higher fuel cell power density and durability than commercial FuMA-Tech (with quaternary ammonium cations) membranes at 30°C, 100% relative humidity (RH). Optimization of the catalyst ink composition (i.e., solids and solvent ratio) and fuel cell performance of membrane electrode assemblies (MEAs) with pentablock terpolymers as both the membrane and ionomer were also investigated. Optimization of the fuel cell operating conditions corroborates with the in situ electrochemical impedance spectroscopy results. The pentablock terpolymer MEA exhibited a maximum power density of 83.3 mW cm-2 and voltage decay rate of 0.7 mV h-1 after 100 h of operation under 40°C, 100% RH. These results show promise for pentablock terptolymers with methylpyrrolidinium cations as a commercially attractive low-cost alternative anion exchange membrane and ionomer for solid-state alkaline fuel cells.

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Ionic liquid‐modified materials as polymer electrolyte membrane and electrocatalyst in fuel cell application: An update

Shaari

Ahmad

Bahru

et al. 2021

Intl J of Energy Research

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Ionic liquids (ILs) are promising solvents for catalytic and electrolyte applications, gas absorption, and extractions in electrochemical systems due to their useful features, such as high conductivity and good thermal, chemical, and electrical stability. This review focuses on incorporating ILs into fuel cell (FC) systems, specifically into two main components of FC (ie, polymer electrolyte membrane and electrocatalyst). In FC, a polymer electrolyte membrane with excellent conductivity and deprived of humidity even at high temperatures must be created for effective early commercialization of this technology.Electrocatalyst performance can also be enhanced with additive materials, such as ILs, thus further improving the entire achievement of FCs. This work discusses the most important reasons for ongoing studies and outlines the current progress in using ILs as a revolutionary form of polymer electrolyte membrane and electrocatalyst.

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Hydroxide conducting polymerized ionic liquid pentablock terpolymer anion exchange membranes with methylpyrrolidinium cations

Cited by 25 publications

References 29 publications

Self‐Assembly of Nonfrustrated ABCBA Linear Pentablock Terpolymers

Self‐Assembly of Nonfrustrated ABCBA Linear Pentablock Terpolymers

Solid‐State Alkaline Fuel Cell Performance of Pentablock Terpolymer with Methylpyrrolidinium Cations as Anion Exchange Membrane and Ionomer

Ionic liquid‐modified materials as polymer electrolyte membrane and electrocatalyst in fuel cell application: An update

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