Anatase titania coated CNTs and sodium lignin sulfonate doped chitosan proton exchange membrane for DMFC application

Wang, Wenyi; Shan, Bojin; Zhu, Liuyong; Xie, Chengcheng; Liu, Caini; Cui, Fangyan

doi:10.1016/j.carbpol.2018.01.078

Cited by 39 publications

(18 citation statements)

References 29 publications

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“…Initially, the PEM samples (5 × 5 cm) were dried at 60°C for 24 h and weighted ( W dry ), they were drenched in DD water/methanol for 24 h, then PEM surface was wiped off, and wet PEM samples are weighed ( W wet ). Water uptake/methanol uptake of the PEMs has been estimated by using Equation 7,19

Water uptake / methanol uptake = \frac{W_{wet} - W_{dry}}{W_{wet}} \times 100 .

…”

Section: Methodsmentioning

confidence: 99%

Enhanced performance of Mindel membranes by incorporating conductive polymer and inorganic modifier for application in direct methanol fuel cells

Ramachandran

Arthanareeswaran

Ismail

et al. 2020

Asia-Pacific J Chem Eng

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Sulfonated polyethersulfone (SPES), polyaniline (PANI), and Cloisite 15 A ® were used as modifiers for the fabrication of Mindel composite polymer electrolyte membranes (PEMs). Pristine Mindel and Mindel composite PEMs were fabricated by the solution intercalation technique. The presence of modifiers in the Mindel membrane matrix was confirmed by Fourier transform infrared (FTIR) studies. The primary characteristics of pristine Mindel and Mindel PEMs such as water uptake, methanol uptake, proton conductivity ion-exchange capacity (IEC), and chemical and mechanical stability were evaluated. The pore size of Mindel/SPES/Cloisite 15 composite PEM was increased owing to the addition of SPES and Cloisite 15. The higher proton conductivity of 4.323 × 10 −4 S cm −1 , enhanced IEC of 0.482 mequiv. g −1 , and maximum water uptake (%) of 38.12 were noted for Mindel/SPES/Cloisite membrane. Membrane selectivity of all Mindel PEMs was enhanced by the addition of modifiers. The results of this study indicate that Mindel composite membranes could be utilized as PEMs for direct methanol fuel cell (DMFC).

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Water uptake / methanol uptake = \frac{W_{wet} - W_{dry}}{W_{wet}} \times 100 .

…”

Section: Methodsmentioning

confidence: 99%

Enhanced performance of Mindel membranes by incorporating conductive polymer and inorganic modifier for application in direct methanol fuel cells

Ramachandran

Arthanareeswaran

Ismail

et al. 2020

Asia-Pacific J Chem Eng

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“…Methanol permeability was measured via a diaphragm diffusion cell method at room temperature . The experimental procedures of WU, AS, IEC, oxidation stability, proton conductivity, and methanol permeability of membrane were detailedly described in our previous research …”

Section: Methodsmentioning

confidence: 99%

Carbon nanocomposites self‐assembly UiO‐66‐doped chitosan proton exchange membrane with enhanced proton conductivity

et al. 2020

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Summary One‐dimensional (1D) sodium ligninsulfonate functionalized carbon nanotubes (SCNT), two‐dimensional (2D) graphene oxide (GO), and three‐dimensional (3D) zirconium‐based metal‐organic frameworks (UiO‐66) are self‐assembled as filler materials for proton‐exchange membranes (PEMs) because of their potential for extending proton transport pathways. Herein, UiO‐66‐SCNT and UiO‐66‐SCNT@GO were prepared by a facile solvothermal synthesis and then the nanohybrid chitosan (CS) PEMs were fabricated via solution casting. The hybrid PEMs with higher ion exchange capacity than the pure CS membrane displayed higher proton conductivity and selectivity. The proton conductivity of nanohybrid membrane doped with 7 wt% UiO‐66‐SCNT@GO (CS/U‐S@GO‐7) was enhanced to 64 mS cm−1 at 70°C. Simultaneously, the selectivity was reached 19.4 × 104 S s cm−3 and was much higher than the pristine CS membrane (0.13 × 103 S s cm−3). Moreover, the mechanical properties of all composite membranes were significantly enhanced compared with that of the pure CS membrane. The results showed that our research provided a valuable strategy for designing high‐performance CS‐based PEMs in direct methanol fuel cell (DMFC). Highlights A simple and facile solvothermal synthesis was used to prepare UiO‐66‐SCNT@GO. UiO‐66‐SCNT@GO was introduced into chitosan (CS) matrix to optimize proton transport channels. CS‐based hybrid membranes exhibit high proton conductivity and selectivity. CS‐based hybrid membranes show low methanol permeability.

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“…In this respect, biopolymer-based membranes are more and more considered as strong candidates to develop cheaper and more environmentally friendly PEMs. Recently, chitosan membranes were proposed as substitutes Nafion PEMs [8][9][10]. In spite of promising results, there is still research effort required to improve the mechanical strength and the conductivity of chitosan membranes [5].…”

Section: Introductionmentioning

confidence: 99%

Chitosan-Sulfated Titania Composite Membranes with Potential Applications in Fuel Cell: Influence of Cross-Linker Nature

Humelnicu¹,

Samoilă²,

Asăndulesa³

et al. 2020

Polymers

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Chitosan-sulfated titania composite membranes were prepared, characterized, and evaluated for potential application as polymer electrolyte membranes. To improve the chemical stability, the membranes were cross-linked using sulfuric acid, pentasodium triphosphate, and epoxy-terminated polydimethylsiloxane. Differences in membranes’ structure, thickness, morphology, mechanical, and thermal properties prior and after cross-linking reactions were evaluated. Membranes’ water uptake capacities and their chemical stability in Fenton reagent were also studied. As proved by dielectric spectroscopy, the conductivity strongly depends on cross-linker nature and on hydration state of membranes. The most encouraging results were obtained for the chitosan-sulfated titania membrane cross-linked with sulfuric acid. This hydrated membrane attained values of proton conductivity of 1.1 × 10−3 S/cm and 6.2 × 10−3 S/cm, as determined at 60 °C by dielectric spectroscopy and the four-probes method, respectively.

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Anatase titania coated CNTs and sodium lignin sulfonate doped chitosan proton exchange membrane for DMFC application

Cited by 39 publications

References 29 publications

Enhanced performance of Mindel membranes by incorporating conductive polymer and inorganic modifier for application in direct methanol fuel cells

Enhanced performance of Mindel membranes by incorporating conductive polymer and inorganic modifier for application in direct methanol fuel cells

Carbon nanocomposites self‐assembly UiO‐66‐doped chitosan proton exchange membrane with enhanced proton conductivity

Chitosan-Sulfated Titania Composite Membranes with Potential Applications in Fuel Cell: Influence of Cross-Linker Nature

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