A novel polybenzimidazole composite modified by sulfonated graphene oxide for high temperature proton exchange membrane fuel cells in anhydrous atmosphere

Cai, Yanfei; Yue, Zhouying; Xu, Shiai

doi:10.1002/app.44986

Cited by 52 publications

(30 citation statements)

References 43 publications

(52 reference statements)

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“…For the SPEEK/PU composite membranes with solution casting method, SPEEK/PU(5/1) membrane could keep the integrity for 10 h and started to disintegrate into small pieces then dissolved into Fenton reagent after 96 h. However, SPEEK/PU(1/5) membrane possessed the intact structure more than 120 h. It was inferred that the chemical stability of (SPEEK/PU) 200 membrane was dominated by SPEEK polymeric skeleton. Comparing with the previous results, PBI membrane has excellent oxidative stability with only 10% weight loss after immersion in Fenton solution for 6 days at 68 °C . Moreover, the chemical stability could be further improved through grafting or cross‐linking.…”

Section: Resultsmentioning

confidence: 65%

Preparation and characterization of layer‐by‐layer self‐assembly membrane based on sulfonated polyetheretherketone and polyurethane for high‐temperature proton exchange membrane

Cheng

Che

2017

J. Polym. Sci. Part A: Polym. Chem.

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A concept of preparing high‐temperature proton exchange membranes with layer‐by‐layer (LBL) self‐assembly technique was proposed and the sulfonated polyetheretherketone (SPEEK) and polyurethane (PU) with 200 LBL deposition cycles denoting (SPEEK/PU)200 membrane was prepared in this research. Owing to the strong electrostatic interaction between  SO3− group in SPEEK and CN+ group in PU, (SPEEK/PU)200 membrane with LBL self‐assembly structure showed a favorable structural stability. The phosphoric acid (PA)‐doped (SPEEK/PU)200 membrane showed a higher proton conductivity relative to PA doped SPEEK/PU membrane by solution casting method (SPEEK/PU)200/40%PA membrane possessed a proton conductivity value of 2.90 × 10−2 S/cm at 150 °C under anhydrous conditions. The LBL self‐assembly structure provided a possibility to reduce the negative effect from polymer skeleton blocking charge carrier species even immobilizing protons. Moreover, the (SPEEK/PU)200 membrane presented the particularly noteworthy mechanical property even with PA doping. The tensile stress values at break were 72.8 and 24.1 MPa, respectively, for (SPEEK/PU)200 and (SPEEK/PU)200/40%PA membrane at room temperature, which were obviously higher than the reported values of 15.9 and 2.81 MPa for SPEEK/PU and SPEEK/PU/60%PA membrane. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 3446–3454

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Section: Resultsmentioning

confidence: 65%

Preparation and characterization of layer‐by‐layer self‐assembly membrane based on sulfonated polyetheretherketone and polyurethane for high‐temperature proton exchange membrane

Cheng

Che

2017

J. Polym. Sci. Part A: Polym. Chem.

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“…Increasing concerns over environmental pollution and depletion of fossil fuel have encouraged the development of sustainable, cost‐effective and enviromentally friendly energy resources . Fuel cells can transform chemical energy stored in fuels directly into electrical energy, and they are more efficient than combustion engines due to the absence of friction . Proton exchange membrane fuel cells (PEMFCs) are considered as a promising energy source due to its excellent properties such as good proton transfer, fuel blocking ability, low pollutant emission, and structure stability .…”

Section: Introductionmentioning

confidence: 99%

Novel sulfonated multi‐walled carbon nanotubes filled chitosan composite membrane for fuel‐cell applications

Ahmed

Ali

Cai

et al. 2019

J of Applied Polymer Sci

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In the present study, multi‐walled carbon nanotubes (MWCNTs) were sulfonated by 1,3‐propane sultone and distillation–precipitation polymerization, respectively, and then incorporated into chitosan (CS) to prepare CS/MWCNTs composite membranes for fuel cell applications. CS/MWCNTs membranes show better thermal and mechanical stability than pure CS membrane due to the strong electrostatic interaction between the SO3H groups of MWCNTs and the NH2 groups of CS, which can restrict the mobility of CS chain. The sulfonated MWCNTs provide efficient proton hopping sites (SO3H, SO3− …. 3+HN), thereby resulting in the formation of continuous proton conducting channels. The composite membranes with 5 wt % of MWCNTs modified by two different ways show a proton conductivity of 0.026 and 0.025 S·cm−1, respectively. In conclusion, CS/MWCNTs membrane is a promising proton exchange membrane for fuel‐cell applications. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47603.

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“…Compared with traditional methods with high temperature and pressure and poisonous chemical agents, it was found that GO could be functionalized economically and efficiently by utilizing a radiation technique . Furthermore, the radiation technique could be used to synthesize polymers conveniently, and the graphene–polymer nanocomposites have been prepared under irradiation …”

Section: Introductionmentioning

confidence: 99%

Radiation synthesis of polysilane‐modified graphene oxide for improving thermal conductivity and mechanical properties of silicone rubber

Dai

Jiao

et al. 2019

J of Applied Polymer Sci

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Functionalized graphene oxide (named GO-Si) was synthesized with graphene oxide and triethoxyvinylsilane (TEVS) using tetrahydrofuran solution by γ-ray irradiation. TEVS was successfully covered onto GO sheets, and the polysilane content on GO-Si was increased upon increasing the absorbed dose. The structures of GO-Si were verified by atomic force microscopy, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The resultant GO-Si was dispersed into α,ω-dihydroxypolydimethylsiloxane to prepare room temperature vulcanized silicone rubber composites (named SR/GO-Si) by solution casting. The dispersion of GO-Si was more uniform than that of GO. Compared to that of pure SR, the thermal conductivity of SR/GO-Si-1.95 composites was increased 1.5-fold, and its tensile strength and elongation at break increased 78.6 and 71.4%, respectively. It was expected that SR/GO-Si would have potential application as the thermal interface material.

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A novel polybenzimidazole composite modified by sulfonated graphene oxide for high temperature proton exchange membrane fuel cells in anhydrous atmosphere

Cited by 52 publications

References 43 publications

Preparation and characterization of layer‐by‐layer self‐assembly membrane based on sulfonated polyetheretherketone and polyurethane for high‐temperature proton exchange membrane

Preparation and characterization of layer‐by‐layer self‐assembly membrane based on sulfonated polyetheretherketone and polyurethane for high‐temperature proton exchange membrane

Novel sulfonated multi‐walled carbon nanotubes filled chitosan composite membrane for fuel‐cell applications

Radiation synthesis of polysilane‐modified graphene oxide for improving thermal conductivity and mechanical properties of silicone rubber

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