Crosslinked polymer electrolytes of high pyridine contents for HT-PEM fuel cells

Charalampopoulos, Christos; Kallitsis, Konstantinos; Anastasopoulos, Charalampos; Daletou, Maria K.; Neophytides, Stylianos G.; Andreopoulou, Aikaterini K.; Kallitsis, Joannis K.

doi:10.1016/j.ijhydene.2020.06.004

Cited by 22 publications

(13 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The samples analyzed here are modified polyethersulfones with pyridine groups (see Figure 1). Both polymers were prepared according to previously published methods 9–11 …”

Section: Methodsmentioning

confidence: 99%

“…Both polymers were prepared according to previously published methods. [9][10][11] Both samples were doped by immersion in H 3 PO 4 , 85 wt%. The linear unreinforced membrane was doped at 120 C for 48 h, whereas the reinforced cross-linkable membrane was doped at 100 C for 110 h to ensure a high crosslinking degree of the side double bonds.…”

Section: Sample Preparationmentioning

confidence: 99%

See 1 more Smart Citation

From orthophosphate to phosphine‐based groups: The effects of argon ion sputtering on doped polyethersulfone films

Dias

Souza

Veiga

et al. 2023

Surface & Interface Analysis

Self Cite

View full text Add to dashboard Cite

Pyridine‐containing polyethersulfone films are being studied extensively as they are considered promising types of polymer electrolyte membranes to be used in high‐temperature fuel cell (HT‐PEMFC) applications. In this study, modified polyethersulfone films doped with phosphoric acid were bombarded by a 3 keV argon ion beam resulting in a different chemical environment at the end of the sputtering process. X ray Photoelectron spectroscopy (XPS) was employed to analyze the changes that occurred due to the exposure to the beam, confirming that distinct species appeared and indicating that reactions between the acid and the film occurred. These changes cause the formation of new phosphine‐based structures and point out the impact of ions as a crucial factor in the degradation of doped polyethersulfone films.

show abstract

“…The samples analyzed here are modified polyethersulfones with pyridine groups (see Figure 1). Both polymers were prepared according to previously published methods 9–11 …”

Section: Methodsmentioning

confidence: 99%

Section: Sample Preparationmentioning

confidence: 99%

From orthophosphate to phosphine‐based groups: The effects of argon ion sputtering on doped polyethersulfone films

Dias

Souza

Veiga

et al. 2023

Surface & Interface Analysis

Self Cite

View full text Add to dashboard Cite

show abstract

“…As reported by Kallitsis et al, both main-chain and side-chain pyridinecontaining poly(aromatic ether) membranes displayed oxidation resistance in the Fenton solution. [17,45] Blending PEKC increased the mechanical stability of membranes in the Fenton reagent. After the 200 h Fenton test, PBAP-30%PEKC, PBAP-50%PEKC and PBAP-70%PEKC membranes maintained their mechanical integrity.…”

Section: Chemical and Thermal Stabilitiesmentioning

confidence: 99%

“…On the other hand, a mainchain basic group containing aromatic polymers has attracted much attention as well. Poly(arylene ether)s with pyridine moiety have been synthesized by Kallitsis et al [17] The PA doped membrane achieved high PA doping content of more than 200 wt.%. However, a multi-step complicated procedure was required to synthesize the monomer of bis(4-hydroxyphenyl)pyridine.…”

Section: Introductionmentioning

confidence: 99%

High‐Performance Poly(biphenyl acetylpyridine) and Poly(ether ketone cardo) Blend Membranes for High‐Temperature Polymer Electrolyte Membrane Fuel Cells

Jin

Wang

Tang

et al. 2022

Macro Materials & Eng

View full text Add to dashboard Cite

Developing high‐temperature polymer electrolyte membranes with sufficient performance and competitive cost is a major scientific checkpoint for promoting the popularization of fuel cells. Herein, poly(biphenyl acetylpyridine) (PBAP) is synthesized by a facile one‐pot Friedel‐Crafts polymerization between 4‐acetylpyridine and biphenyl. The PBAP has excellent solubility in polar solvents, while its membrane shows a significantly high phosphoric acid (PA) absorption capacity due to the presence of amounts of pyridine groups. However, the pure PBAP membrane is dissolved in 85 wt.% PA solution. In order to solve excessive expansion and poor mechanical stability, a series of PBAP blend membranes are fabricated by mixing PBAP with commercial engineering thermoplastic of poly(ether ketone cardo) (PEKC). Blending PEKC significantly improves the dimensional and mechanical stabilities. In particular, blend membranes exhibit remarkable chemical stability as documented by Fenton test, while membranes after Fenton test display slightly higher acid uptakes and conductivities. As a result, the PBAP‐50wt.%PEKC/170%PA membrane shows a conductivity of 0.051 S cm−1 at 160 °C and mechanical strength of 8.3 MPa at 25 °C. The peak power density at 160 °C of the H2‐O2 single cell with above membrane is 632 mW cm−2, indicating the potential of PBAP‐x%PEKC/PA membranes for fuel cells.

show abstract

“…Fuel cells showed great promise in energy storage, especially in the onboard automotive industry and stationary power generation [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. However, carbon monoxide was easily absorbed on the catalyst during the reformation of hydrocarbon, which becomes a dominant obstruction for the further use of fuel cells.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Proton Conductivity Performance in High Temperature Polymer Electrolyte Membrane, Processed the Adding of Pyridobismidazole

et al. 2022

View full text Add to dashboard Cite

A pyridobisimidazole unit was introduced into a polymer backbone to obtain an increased doping level, a high number of interacting sites with phosphoric acid and simple processibility. The acid uptake of poly(pyridobisimidazole) (PPI) membrane could reach more than 550% (ADL = 22), resulting in high conductivity (0.23 S·cm−1 at 180 °C). Along with 550% acid uptake, the membrane strength still held 10 MPa, meeting the requirement of Proton Exchange Membrane (PEM). In the Fenton Test, the PPI membrane only lost around 7% weight after 156 h, demonstrating excellent oxidative stability. Besides, PPI possessed thermal stability with decomposition temperature at 570 °C and mechanical stability with a glass transition temperature of 330 °C.

show abstract

Crosslinked polymer electrolytes of high pyridine contents for HT-PEM fuel cells

Cited by 22 publications

References 55 publications

From orthophosphate to phosphine‐based groups: The effects of argon ion sputtering on doped polyethersulfone films

From orthophosphate to phosphine‐based groups: The effects of argon ion sputtering on doped polyethersulfone films

High‐Performance Poly(biphenyl acetylpyridine) and Poly(ether ketone cardo) Blend Membranes for High‐Temperature Polymer Electrolyte Membrane Fuel Cells

Enhancement of Proton Conductivity Performance in High Temperature Polymer Electrolyte Membrane, Processed the Adding of Pyridobismidazole

Contact Info

Product

Resources

About