Preparation of polybenzimidazole/ZIF-8 and polybenzimidazole/UiO-66 composite membranes with enhanced proton conductivity

Eren, Enis Oğuzhan; Özkan, Necati; Devrim, Yılser

doi:10.1016/j.ijhydene.2021.11.045

Cited by 31 publications

(7 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be found that the tensile strength of the composite membrane is greater than that of SPEEK, reaching 59.53 MPa at 2% MOF content, which may be due to the fact that the sulfonamide bond formed by SPEEK and MOF prevents the movement of the polymer chain and improves the mechanical properties of the membrane . When the loading rate of Fe-MIL-101-NH 2 exceeds 2%, the excess MOF does not react completely with SPEEK, resulting in the aggregation of MOF in the SPEEK substrate, which reduces the uniformity of the composite film and further reduces the tensile strength …”

Section: Resultsmentioning

confidence: 98%

“…60 When the loading rate of Fe-MIL-101-NH 2 exceeds 2%, the excess MOF does not react completely with SPEEK, resulting in the aggregation of MOF in the SPEEK substrate, which reduces the uniformity of the composite film and further reduces the tensile strength. 61 The proton conductivities of SPEEK, SPEEK/MOF, and SCPEEK@MOF at 298 K were studied at 98% RH, showing that there was a significant increase in proton conductivity by loading SPEEK with MOF (Figures 6a and S11), where SCPEEK@MOF-2 is an order of magnitude higher than pure SPEEK membranes. In addition, the conductivity of both composite membranes first increases and then decreases with the increase in MOF content under the same conditions and reaches the maximum at 2% MOF content (SPEEK/MOF-2: o′ = 6.4 × 10 −3 S cm −1 ; SCPEEK@MOF-2: o′ = 2.26 × 10 −2 S cm −1 ), which was attributed to the fact that with the increase in MOF content in the composite membrane, the excess Fe-MIL-101-NH 2 cannot fully react and attach to the polymer chain of SPEEK, and the free MOF that has not been chemically reacted does not have good proton conductivity, resulting in the decrease in proton conductivity of the composite membrane.…”

Section: Resultsmentioning

confidence: 98%

See 1 more Smart Citation

Anchoring of Fe-MIL-101-NH₂ to the Polymer Membrane Matrix through the Hinsberg Reaction to Promote Conductivity of SPEEK Membranes

Zhang,

Shang,

Wang

et al. 2024

J. Phys. Chem. B

View full text Add to dashboard Cite

SCPEEK@MOF proton exchange membranes, where SCPEEK is sulfinyl chloride polyether ether ketone and MOF is a metal–organic framework, were prepared by doping Fe-MIL-101-NH2 into polymers. The amino group in the MOF and the -SOCl2 group in thionyl chloride polyether ether ketone cross-link to form a covalent bond through the Hinsberg reaction, and the prepared composite membrane has stronger stability than other electrostatic interactions and simple physical doping composite membranes. The formation of covalent bonds improves the water absorption of the composite membrane, which makes it easy for water molecules to form hydrogen bonds. Moreover, SPEEK as a proton conductive polymer and the synergy of MOFs improve the proton conductivity of composite membranes. The composite membranes were characterized by Fourier transform infrared spectroscopy, powder X-ray diffraction, scanning electron microscopy, and atomic force microscopy. The swelling rate, water absorption, mechanical stability, ion exchange capacity, and proton conductivity of the pure sulfonated polyether ether ketone (SPEEK) membrane were compared with those of the mechanically doped SPEEK/MOF membrane and the composite membrane SCPEEK@MOF doped with different ratios of Fe-MIL-101-NH2, and all of the SCPEEK@MOF showed superior performance. When the Fe-MIL-101-NH2 loading rate of the composite membrane is 2%, the proton conductivity of the composite membrane can reach 0.202 S cm–1 at 363 K and a 98% relative humidity, which is much higher than that of the SPEEK/MOF membrane obtained by simple physical doping under the same conditions.

show abstract

Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 98%

Anchoring of Fe-MIL-101-NH₂ to the Polymer Membrane Matrix through the Hinsberg Reaction to Promote Conductivity of SPEEK Membranes

Zhang,

Shang,

Wang

et al. 2024

J. Phys. Chem. B

View full text Add to dashboard Cite

show abstract

“…The nanocomposite membrane comprising 2.5 wt % pSPAK- g -GO and OPBI showed a proton conductivity of 0.327 S cm –1 , which is 5 times higher than that of pristine OPBI membrane at 160 °C. The effects of different MOFs, inorganic oxides, and HPA on PBI-PA membranes are summarized in Table . ,,,,,,− …”

Section: Nonfluorinated Arylene Polymer Membranesmentioning

confidence: 99%

A Critical Review of Electrolytes for Advanced Low- and High-Temperature Polymer Electrolyte Membrane Fuel Cells

Javed

González

Thangadurai

2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

In the 21st century, proton exchange membrane fuel cells (PEMFCs) represent a promising source of power generation due to their high efficiency compared with coal combustion engines and eco-friendly design. Proton exchange membranes (PEMs), being the critical component of PEMFCs, determine their overall performance. Perfluorosulfonic acid (PFSA) based Nafion and nonfluorinated-based polybenzimidazole (PBI) membranes are commonly used for low-and high-temperature PEMFCs, respectively. However, these membranes have some drawbacks such as high cost, fuel crossover, and reduction in proton conductivity at high temperatures for commercialization. Here, we report the requirements of functional properties of PEMs for PEMFCs, the proton conduction mechanism, and the challenges which hinder their commercial adaptation. Recent research efforts have been focused on the modifications of PEMs by composite materials to overcome their drawbacks such as stability and proton conductivity. We discuss some current developments in membranes for PEMFCs with special emphasis on hybrid membranes based on Nafion, PBI, and other nonfluorinated proton conducting membranes prepared through the incorporation of different inorganic, organic, and hybrid fillers.

show abstract

“…The working principle is the same as that of the fuel cell system. The fuel cell is used to make the mixed gas pass through one side of the fuel cell and apply current to the cell. − The hydrogen atom loses electrons in the anode reaction to form hydrogen ions. The hydrogen ions move to the cathode side under the drive of the electrode to obtain electrons and recombine into hydrogen.…”

Section: Hydrogen Pipeline Transportationmentioning

confidence: 99%

Key Technologies of Pure Hydrogen and Hydrogen-Mixed Natural Gas Pipeline Transportation

et al. 2023

View full text Add to dashboard Cite

Thanks to the advantages of cleanliness, high efficiency, extensive sources, and renewable energy, hydrogen energy has gradually become the focus of energy development in the world's major economies. At present, the natural gas transportation pipeline network is relatively complete, while hydrogen transportation technology faces many challenges, such as the lack of technical specifications, high safety risks, and high investment costs, which are the key factors that hinder the development of hydrogen pipeline transportation. This paper provides a comprehensive overview and summary of the current status and development prospects of pure hydrogen and hydrogen-mixed natural gas pipeline transportation. Analysts believe that basic studies and case studies for hydrogen infrastructure transformation and system optimization have received extensive attention, and related technical studies are mainly focused on pipeline transportation processes, pipe evaluation, and safe operation guarantees. There are still technical challenges in hydrogenmixed natural gas pipelines in terms of the doping ratio and hydrogen separation and purification. To promote the industrial application of hydrogen energy, it is necessary to develop more efficient, low-cost, and low-energy-consumption hydrogen storage materials.

show abstract

Preparation of polybenzimidazole/ZIF-8 and polybenzimidazole/UiO-66 composite membranes with enhanced proton conductivity

Cited by 31 publications

References 72 publications

Anchoring of Fe-MIL-101-NH₂ to the Polymer Membrane Matrix through the Hinsberg Reaction to Promote Conductivity of SPEEK Membranes

Anchoring of Fe-MIL-101-NH₂ to the Polymer Membrane Matrix through the Hinsberg Reaction to Promote Conductivity of SPEEK Membranes

A Critical Review of Electrolytes for Advanced Low- and High-Temperature Polymer Electrolyte Membrane Fuel Cells

Key Technologies of Pure Hydrogen and Hydrogen-Mixed Natural Gas Pipeline Transportation

Contact Info

Product

Resources

About

Preparation of polybenzimidazole/ZIF-8 and polybenzimidazole/UiO-66 composite membranes with enhanced proton conductivity

Cited by 31 publications

References 72 publications

Anchoring of Fe-MIL-101-NH2 to the Polymer Membrane Matrix through the Hinsberg Reaction to Promote Conductivity of SPEEK Membranes

Anchoring of Fe-MIL-101-NH2 to the Polymer Membrane Matrix through the Hinsberg Reaction to Promote Conductivity of SPEEK Membranes

A Critical Review of Electrolytes for Advanced Low- and High-Temperature Polymer Electrolyte Membrane Fuel Cells

Key Technologies of Pure Hydrogen and Hydrogen-Mixed Natural Gas Pipeline Transportation

Contact Info

Product

Resources

About

Anchoring of Fe-MIL-101-NH₂ to the Polymer Membrane Matrix through the Hinsberg Reaction to Promote Conductivity of SPEEK Membranes

Anchoring of Fe-MIL-101-NH₂ to the Polymer Membrane Matrix through the Hinsberg Reaction to Promote Conductivity of SPEEK Membranes