Synthesis, characterization and fuel cell performance tests of boric acid and boron phosphate doped, sulphonated and phosphonated poly(vinyl alcohol) based composite membranes

Şahin, Alpay; Ar, İrfan

doi:10.1016/j.jpowsour.2015.03.188

Cited by 36 publications

(19 citation statements)

References 38 publications

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“…The membrane electrode assembly preparation technique was stated previously . The protonation process was applied to increase the proton conductivity of the proton exchange membranes.…”

Section: Methodsmentioning

confidence: 99%

“…The membrane electrode assembly preparation technique was stated previously. [25] The protonation process was applied to increase the proton conductivity of the proton exchange membranes. Protonation was carried out by plunging the synthesized membranes in to the continuously stirred 0.5 M H 2 SO 4 solution at 60 C, and they were then soaked in deionized water at 60 C for 1 hour.…”

Section: Preparation Of Membrane Electrode Assembly (Mea)mentioning

confidence: 99%

“…PEEK can be functionalized by sulphonation or phosphonation applications, which are widely applied to enhance the proton conductivity of PEM. Some studies demonstrated that sulphonation is much more effective than phosphonation for improved proton conductivity . Sulphuric acid treatment of polyether ether ketone polymer is an electrophilic reaction that causes the charged groups to interact with the chain.…”

Section: Introductionmentioning

confidence: 99%

“…Some studies demonstrated that sulphonation is much more effective than phosphonation for improved proton conductivity. [25,26] Sulphuric acid treatment of polyether ether ketone polymer is an electrophilic reaction that causes the charged groups to interact with the chain. The hydrogen sulphate ion (HSO 4 − ) is attached to the polymer structure's bond and makes the polymer ion exchangeable.…”

Section: Introductionmentioning

confidence: 99%

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Incorporating sepiolite and kaolinite to improve the performance of SPEEK composite membranes for proton exchange membrane fuel cells

Çalı

Şahin

2019

Can J Chem Eng

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SPEEK polymer based thermally crosslinked polymer membranes are prepared by sol‐gel synthesis using kaolinite and sepiolite clays as additives. Characterization tests, ie, mechanical stability, thermal gravimetric analysis, ion exchange capability, swelling properties, water uptake capacities, electrochemical impedance spectroscopy analysis, and Fourier transform infrared spectroscopy (FTIR) analysis of the membranes were conducted. The sepiolite and kaolinite addition enhanced the thermal stability and the thermal crosslinking reduced the swelling capacity of the synthesized membranes. Proton conductivity results were increased from 0.172 to 0.268 S cm−1 by adding 9% of kaolinite, and to 0.329 S cm−1 at 80°C by adding 9% of sepiolite to the SPEEK membrane's polymer structure. The fuel cell current density and potential measurements of 141 mA cm−2 and 84.6 mW cm−2 were found respectively at 0.6 V for the SPEEK/S9 membrane, whereas values of 600 mA cm−2 and 348 mW cm−2 were found for the Nafion commercial membrane.

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“…The membrane electrode assembly preparation technique was stated previously . The protonation process was applied to increase the proton conductivity of the proton exchange membranes.…”

Section: Methodsmentioning

confidence: 99%

Section: Preparation Of Membrane Electrode Assembly (Mea)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Incorporating sepiolite and kaolinite to improve the performance of SPEEK composite membranes for proton exchange membrane fuel cells

Çalı

Şahin

2019

Can J Chem Eng

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“…A lithium‐ion cell consists of a positive electrode, a negative electrode, an electrolyte, and a separator . With the development of the production and research on polymeric nanofibers many research works concerning the usage of composite nanofiber mats as electrodes and/or separators in LIBs have been published . The only inactive compound in the electrochemical reaction is the separator for LIBs, that is, a permeable membrane between the electrodes, which plays a vital role in preventing the electrodes to physically come into contact with one another .…”

Section: Introductionmentioning

confidence: 99%

PVDF/TiO₂/graphene oxide composite nanofiber membranes serving as separators in lithium‐ion batteries

Khassi

Youssefi

Semnani

2019

J of Applied Polymer Sci

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Improving the electrochemical properties of membranes in lithium‐ion batteries (LIBs) is very important. Many attempts have been made to optimize ionic conductivity of membranes. The aim of this study was fabricating composite nanofiber membranes of poly(vinylidene fluoride) (PVDF), containing titanium dioxide (TiO2) and graphene oxide (GO) nanoparticles to use in LIBs as separators. The morphology, crystallinity, porosity, pore size, electrolyte uptake, ionic conductivity, and electrochemical stability of the membranes were investigated using scanning electron microscopy, wide‐angle X‐ray diffraction, Fourier transform infrared spectroscopy, electrochemical impedance spectroscopy, and linear sweep voltammetry. The electrolyte uptake and ionic conductivity of the PVDF/TiO2/GO composite nanofiber membranes containing 2 wt % GO were 494% and 4.87 mS cm−1, respectively, which were higher than those of the other fabricated membranes as well as the commercial Celgard membrane. This could be attributed to the increased porosity, larger surface area, and higher amorphous regions of the PVDF/TiO2/GO composite nanofiber membranes as a result of the synergistic effects of the nanoparticles. In this work, suitable optimized membranes with greater electrochemical stability compared with the other membranes were presented. Also, it was demonstrated that the incorporation of the TiO2 and GO nanoparticles into the PVDF nanofiber membranes led to a porous structure where the electrolyte uptake enhanced. These properties made these membranes promising candidates for being used as separators in LIBs. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48775.

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Hybrid Interpolymeric Complexes

Prosanov

2023

Polyvinyl Alcohol‐Based Biocomposites and Bionanocomposites

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Synthesis, characterization and fuel cell performance tests of boric acid and boron phosphate doped, sulphonated and phosphonated poly(vinyl alcohol) based composite membranes

Cited by 36 publications

References 38 publications

Incorporating sepiolite and kaolinite to improve the performance of SPEEK composite membranes for proton exchange membrane fuel cells

Incorporating sepiolite and kaolinite to improve the performance of SPEEK composite membranes for proton exchange membrane fuel cells

PVDF/TiO₂/graphene oxide composite nanofiber membranes serving as separators in lithium‐ion batteries

Hybrid Interpolymeric Complexes

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Synthesis, characterization and fuel cell performance tests of boric acid and boron phosphate doped, sulphonated and phosphonated poly(vinyl alcohol) based composite membranes

Cited by 36 publications

References 38 publications

Incorporating sepiolite and kaolinite to improve the performance of SPEEK composite membranes for proton exchange membrane fuel cells

Incorporating sepiolite and kaolinite to improve the performance of SPEEK composite membranes for proton exchange membrane fuel cells

PVDF/TiO2/graphene oxide composite nanofiber membranes serving as separators in lithium‐ion batteries

Hybrid Interpolymeric Complexes

Contact Info

Product

Resources

About

PVDF/TiO₂/graphene oxide composite nanofiber membranes serving as separators in lithium‐ion batteries