High-temperature proton exchange membranes based on polybenzimidazole and clay composites for fuel cells

Plackett, David; Siu, Ana; Li, Qingfeng; Pan, Chao; Jensen, Jens Oluf; Nielsen, Søren Fæster; Permyakova, Anastasia; Bjerrum, Niels

doi:10.1016/j.memsci.2011.08.038

Cited by 117 publications

(42 citation statements)

References 51 publications

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“…The PADL as a function of the GO or RGO content at 80 °C is shown in Figure . The PADL of PBI membrane with ether bond is 222 wt % (9.1 mol of PA per mole polymer repeat unit), which is higher than that of aromatic PBI (5–6 mol) because the ether bond can help absorb PA by hydrogen‐bond interaction. The PADL of PBI/GO or PBI/RGO composite membranes remains almost unchanged (217–227 wt %) with the increase of the GO or RGO content due to the interactions of the hydroxyl and carboxyl groups in GO or RGO with PA via the hydrogen bond, thus indicating that the RGO or GO content has no significant effect on the PADL.…”

Section: Resultssupporting

confidence: 90%

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

Cai

Yue

2017

J of Applied Polymer Sci

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A novel functional graphene with high ion exchange capacity (IEC) was prepared by grafting reaction induced by 60 Co g-ray irradiation using graphene oxide. Then, polybenzimidazole/radiation grafting graphene oxide (PBI/RGO) composite membranes were prepared by the solution-casting method and doped with phosphoric acid (PA) to improve their proton conductivity. The properties of PBI/GO/PA and PBI/RGO/PA membranes including the PA doping level, chemical stability, proton conductivity and mechanical properties were evaluated and compared. The tensile strength of PBI/RGO/PA membranes (ranging from 27.3 to 38.5 MPa) increases at first and then decreases with the increase of the RGO content, and is significantly higher than that of other PA doped PBI-based membranes. The proton conductivity of PBI/RGO-3/PA membrane is 28.0 mS cm 21 at 170 8C without humidity, with an increase of 72.0% compared with that of PBI/PA membrane. These results suggest that PBI/RGO/PA membranes have the potential to be used as high-temperature proton exchange membranes.

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Section: Resultssupporting

confidence: 90%

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

Cai

Yue

2017

J of Applied Polymer Sci

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“…1), was used as a nano filler to reinforce ABPBI membrane, due to its high aspect ratio and low price [16] [17]. It was reported that sulfonated MMT was used to balance the ionic conductivity and mechanical properties of the composite membranes [18,19]. In this paper, MMT incorporated sulfoanted ABPBI composite membranes are prepared and the effects of the cloisite Na + nanoclay on the mechanical properties, ILs doping levels and ionic conductivities are investigated.…”

Section: Introductionmentioning

confidence: 99%

Sulfonated poly(2,5-benzimidazole) (ABPBI)/ MMT/ ionic liquids composite membranes for high temperature PEM applications

Bao

Zhang

Liu

2015

International Journal of Hydrogen Energy

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“…This is done to avoid the high acid loadings required to achieve reasonable conductivity which can cause mechanical stability issues with the PBI membranes [66][67][68]. An avenue to avoid this issue currently being researched involves filling the membrane with solid proton conductors such as solid acids, ionic liquids, and graphite [50,[69][70][71][72][73][74][75][76][77][78] or hygroscopic materials [79][80][81][82].…”

Section: High Temperature Polymer Electrolyte Membranesmentioning

confidence: 99%

Catalyst, Membrane, Free Electrolyte Challenges, and Pathways to Resolutions in High Temperature Polymer Electrolyte Membrane Fuel Cells

2017

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High temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) are being studied due to a number of benefits offered versus their low temperature counterparts, including co-generation of heat and power, high tolerance to fuel impurities, and simpler system design. Approximately 90% of the literature on HT-PEM is related to the electrolyte and, for the most part, these electrolytes all use free phosphoric acid, or similar free acid, as the ion conductor. A major issue with using phosphoric acid based electrolytes is the free acid in the electrodes. The presence of the acid on the catalyst sites leads to poor oxygen activity, low solubility/diffusion, and can block electrochemical sites through phosphate adsorption. This review will focus on these issues and the steps that have been taken to alleviate these obstacles. The intention is this review may then serve as a tool for finding a solution path in the community.

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High-temperature proton exchange membranes based on polybenzimidazole and clay composites for fuel cells

Cited by 117 publications

References 51 publications

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

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

Sulfonated poly(2,5-benzimidazole) (ABPBI)/ MMT/ ionic liquids composite membranes for high temperature PEM applications

Catalyst, Membrane, Free Electrolyte Challenges, and Pathways to Resolutions in High Temperature Polymer Electrolyte Membrane Fuel Cells

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