Synthesis and characterization of novel cross-linked quaternized poly(vinyl alcohol) membranes based on morpholine for anion exchange membranes

Li, Ye; Zhai, Liangfang; Fang, Jianhua; Liu, Jianhong; Li, Cuihua; Guan, Rong

doi:10.1016/j.ssi.2013.03.019

Cited by 32 publications

(21 citation statements)

References 23 publications

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“…This may be that the imidazolium polymer tends to be more hydrophilic with increasing IEC. The mobility of both water and polymer chains increased by increasing temperature resulting in a lager free volume [27,28]. As expected, all of the as-prepared AEMs showed much lower swelling than typical AEMs due to the formation of a crosslinked network.…”

Section: Properties Of Mim-cpes-x/y Membranessupporting

confidence: 62%

“…A membrane with higher σ/SR indicates that a higher conductivity can be obtained at the same swelling ratio. As listed in Table 3, in comparison with the commercial proton exchange membrane Nafion s 117 and the currently reported crosslinked AEMs [10,16,28,29], the MIM-CPES-x/y membranes are found to have a much higher σ/SR value. The presence of cardo-type structure, phenolphthalein and fluorene groups, could force each polymer chain apart resulting in large interchain separations (free volume) in which water molecules could be confined [21,22].…”

Section: Hydroxide Conductivitymentioning

confidence: 93%

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Highly ionic-conductive crosslinked cardo poly(arylene ether sulfone)s as anion exchange membranes for alkaline fuel cells

Zhuo

Lai

Zhang

et al. 2015

Journal of Membrane Science

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Section: Properties Of Mim-cpes-x/y Membranessupporting

confidence: 62%

Section: Hydroxide Conductivitymentioning

confidence: 93%

Highly ionic-conductive crosslinked cardo poly(arylene ether sulfone)s as anion exchange membranes for alkaline fuel cells

Zhuo

Lai

Zhang

et al. 2015

Journal of Membrane Science

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“…The second transition region was at 220-300˝C, with a weight loss of approximately 30-40 wt % and occurred due to the degradation of the QPVA polymer matrix. This was due to the loss of an aliphatic group embedded in the backbone of the polymer, followed by the loss of OH´ions from the PVA matrix [32]. The weight loss temperature of the third phase was between 350 and 560˝C and represented the main chain cleavage and side chain cleavage of the QPVA functional group due to a thermal cracking reaction.…”

Section: Thermal Analysismentioning

confidence: 99%

Fumed Silica Nanoparticles Incorporated in Quaternized Poly(Vinyl Alcohol) Nanocomposite Membrane for Enhanced Power Densities in Direct Alcohol Alkaline Fuel Cells

et al. 2015

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A nanocomposite polymer membrane based on quaternized poly(vinyl alcohol)/fumed silica (QPVA/FS) was prepared via a quaternization process and solution casting method. The physico-chemical properties of the QPVA/FS membrane were investigated. Its high ionic conductivity was found to depend greatly on the concentration of fumed silica in the QPVA matrix. A maximum conductivity of 3.50ˆ10´2 S/cm was obtained for QPVA/5%FS at 60˝C when it was doped with 6 M KOH. The permeabilities of methanol and ethanol were reduced with increasing fumed silica content. Cell voltage and peak power density were analyzed as functions of fumed silica concentration, temperature, methanol and ethanol concentrations. A maximum power density of 96.8 mW/cm 2 was achieved with QPVA/5%FS electrolyte using 2 M methanol + 6 M KOH as fuel at 80˝C. A peak power density of 79 mW/cm 2 was obtained using the QPVA/5%FS electrolyte with 3 M ethanol + 5 M KOH as fuel. The resulting peak power densities are higher than the majority of published reports. The results confirm that QPVA/FS exhibits promise as a future polymeric electrolyte for use in direct alkaline alcoholic fuel cells.

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“…Han et al tried to synthesize the QPVA based membrane with iodomethane as a quaternization reagent to converting the pyridine groups to the quaternized ammonium group. Ye et al conducted the modification of QPVA with the morpholine and epoxy resin in order to enhance the thermal properties of the membrane. Besides, the modification of polymeric structure is one promising solution in order to develop‐QPVA based membrane with excellent of conductivity properties and suppress of fuel permeabilities.…”

Section: Current Status Of Qpva‐based Membrane In Direct Methanol Andmentioning

confidence: 99%

A review of quaternized polyvinyl alcohol as an alternative polymeric membrane in DMFCs and DEFCs

Zakaria

Kamarudin

2020

Int J Energy Res

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Summary Direct methanol fuel cells (DMFCs) and direct ethanol fuel cells (DEFCs) have emerged as alternative power generators for portable devices and household appliances because of their easy and fast production of electricity, as well as high energy conversion to provide high‐power density. However, several critical factors limit the commercialization of DMFCs and DEFCs, particularly issues related to polymer electrolyte membranes, including the high‐cost production of Nafion membranes and cell degradation caused by high fuel crossover and dehydration. This review paper provides an overview of the current status and challenges in quaternized polyvinyl alcohol (QPVA)‐based membranes as an alternative polymer electrolyte membrane for DMFCs and DEFCs. The main advantages of using QPVA‐based membranes in fuel cells are reduced cost production of membrane, fuel‐crossover minimization, and competitive conductivity with Nafion membrane. The effects of modifying the QPVA‐based membrane, especially on conductivity properties, fuel crossover, uptake condition, mechanical, thermal, and chemical properties, and single‐cell performance are comprehensively discussed. The best performances of DMFCs and DEFCs with utilizing QPVA‐based membrane are reported as 272 and 144 mW cm−2, respectively. This paper is the first to highlight the current status and challenges of QPVA‐based membranes for DMFCs and DEFCs applications.

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Synthesis and characterization of novel cross-linked quaternized poly(vinyl alcohol) membranes based on morpholine for anion exchange membranes

Cited by 32 publications

References 23 publications

Highly ionic-conductive crosslinked cardo poly(arylene ether sulfone)s as anion exchange membranes for alkaline fuel cells

Highly ionic-conductive crosslinked cardo poly(arylene ether sulfone)s as anion exchange membranes for alkaline fuel cells

Fumed Silica Nanoparticles Incorporated in Quaternized Poly(Vinyl Alcohol) Nanocomposite Membrane for Enhanced Power Densities in Direct Alcohol Alkaline Fuel Cells

A review of quaternized polyvinyl alcohol as an alternative polymeric membrane in DMFCs and DEFCs

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