Enhancing Proton Conduction of Poly(benzimidazole) with Sulfonated Titania Nano Composite Membrane for PEM Fuel Cell Applications

Kumar, Krishna; Prabhu, M. Ramesh

doi:10.1007/s13233-021-9014-7

Cited by 15 publications

(9 citation statements)

References 43 publications

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“…The effect of the crystallinity gave PBIO membranes excellent IEC properties. The IEC value for PBIOsm obtained in the study was slightly higher than that reported in the literature [43][44][45][46][47][48]. In Table 4, the IEC values reported in the literature studies are compared with those obtained for the PBIO membranes synthesized in this study.…”

Section: Resultsmentioning

confidence: 60%

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Improving proton conductivity of poly(oxyphenylene benzimidazole) membranes with sulfonation and magnetite addition

Özaytekin

2021

Iran Polym J

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Flexible membranes of poly(oxyphenylene benzimidazole) (PBIO) polymer with oxygen in the main chain were prepared. Proton conductivity was improved by sulfonation and adding magnetite to the PBIO membrane. A hydrophilic PBIO polymer/ polyvinylidene difluoride (PVDF) mixture was used to prepare the membrane. DMF/acetone solvent pair was used to obtain homogeneous solutions of these two polymers. By modifying the PBIO with sulfuric acid, the PBIO membrane and PBIOsm composite membrane were obtained through sulfuric acid modification as well as the addition of magnetite. The structures of the obtained cast PBIO membranes were illuminated by FTIR, TGA, SEM, and EDX analyses. According to XRD analysis, the crystallization percentages of PBIO, PBIOs, and PBIOsm were compared and a synergistic effect of the degree of crystallization on the ability of the ion exchange was observed. The highest degree of crystallinity was determined at 79% for PBIOsm. Upon the addition of magnetite, the water-holding capacity and proton conductivity of the PBIO membranes increased. The proton conductivity values were measured at 90, 120, and 140 °C. The proton conductivity was found to be higher in the sulfonated PBIOs and sulfonated-magnetite doped membranes. The highest proton conductivity of 36.78 mS/ cm was obtained from the combination of sulfuric acid and PBIOsm composite membrane. The proton conductivity of the PBIO membrane was measured to be 36.61 mS/cm.

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Section: Resultsmentioning

confidence: 60%

“…Therefore, the prepared hybrid membranes find potential application of PEMFC at high temperatures. In Table 5, the proton conductivity values reported in the literature are compared with those obtained for the PBIO membranes in this study [40,43,44,[55][56][57].…”

Section: Resultsmentioning

confidence: 99%

Improving proton conductivity of poly(oxyphenylene benzimidazole) membranes with sulfonation and magnetite addition

Özaytekin

2021

Iran Polym J

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“…Due to the hygroscopic nature of polybenzimidazole, the O-H vibrational peak of water at 3615 cm −1 was observed in all spectra. 38 The vibrational peaks at 3410 and 3199 cm −1 were assigned to the non-hydrogen bonded N-H groups and hydrogen bonded N-H groups, respectively. 39 The characteristic peaks at 1632 and 1435 cm −1 were attributed to the C=N stretching absorptions and the in-plane deformations of imidazole rings, 30 which indicated the successful formation of the imidazole ring.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of phosphonated polybenzimidazole membranes with improved proton conductivity for high-temperature proton exchange membrane applications

Wang

Chen

et al. 2022

High Performance Polymers

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The study has synthesized a novel dicarboxylic acid monomer with phosphonate group, 2-((diethoxyphosphoryl)methyl)-[1,1′-biphenyl]-4,4′-dicarboxylic acid (PMDA), and then successfully prepared a series of polybenzimidazole polymers containing methyl-phosphonic acid group and ether group (POPBI-x) via the polycondensation between PMDA, 4,4′-oxybis (benzoic acid) (OBBA) and 3,3′-diaminobenzidine (DAB) in polyphosphoric acid (PPA)/phosphorus pentoxide (P2O5). Meanwhile, the smooth membranes were fabricated via the solution-casting method. Results of TGA, the Fenton’s reagent immersing test, and the tensile test showed that the POPBI-x membranes possessed good thermo-oxidative stability and mechanical properties. Moreover, compared to poly[2,2′-(p-oxydiphenylene)-5,5′-benzimidazole] (OPBI), POPBI-x had a significant enhancement in the phosphoric acid doping level, PA retention ability, and proton conductivity after doped with phosphoric acid (PA) because the methyl-phosphonic acid groups on the backbones enriched the hydrogen bonding interactions between the polymer chain and phosphoric acid. Notably, the POPBI-19 exhibited a high phosphoric acid doping level of approximately 11.3 and excellent proton conductivity of approximately 0.0523 S cm−1 at 180°C under anhydrous conditions.

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“…In this regard, inorganic fillers have also proven to be a good candidate to be used in proton exchange membranes at high temperature. Titanium dioxide is such an inorganic filler, which has already been used into PBI membranes for fuel cell applications [ 30 , 31 , 32 , 33 ], demonstrating its benefits in reducing gas crossover and increasing the acid retention and the acid doping level. Therefore, in this work, TiO 2 -PBI membranes with different TiO 2 concentrations will be evaluated for the sulfur dioxide depolarized electrolysis, aiming to reduce the crossover of SO 2 from the anode of the cell which, in turn, will help to obtain hydrogen with higher purity.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of the Green H2 Production by Using TiO2 Composite Polybenzimidazole Membranes

et al. 2022

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This study reports the hydrogen production using TiO2 based composite polybenzimidazole membranes through the SO2 depolarized electrolysis that requires lower energy input than the direct water electrolysis. Composite membranes prepared and studied in this work showed very promising results in terms of proton conductivity, chemical stability, and crossover. Thus, a reduction in SO2 crossover was observed with the increase of the concentration of TiO2, obtaining reductions as high as 42% with the 3.0 wt% TiO2-PBI membrane at 120 °C. Higher hydrogen production rates and Faradaic efficiencies were achieved by all the composite membranes, with an optimum for the 1.0 wt% TiO2-PBI membrane (with this membrane, the production of hydrogen increased a 53% at 110 °C and a 49% at 120 °C as compared with the standard PBI membrane), demonstrated the benefit of the use of composite membranes with respect to the standard one for green hydrogen production.

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Enhancing Proton Conduction of Poly(benzimidazole) with Sulfonated Titania Nano Composite Membrane for PEM Fuel Cell Applications

Cited by 15 publications

References 43 publications

Improving proton conductivity of poly(oxyphenylene benzimidazole) membranes with sulfonation and magnetite addition

Improving proton conductivity of poly(oxyphenylene benzimidazole) membranes with sulfonation and magnetite addition

Synthesis and characterization of phosphonated polybenzimidazole membranes with improved proton conductivity for high-temperature proton exchange membrane applications

Enhancement of the Green H2 Production by Using TiO2 Composite Polybenzimidazole Membranes

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