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Highly durable polybenzimidazole composite membranes with phosphonated graphene oxide for high temperature polymer electrolyte membrane fuel cells

Abouzari-Lotf, Ebrahim and Zakeri, Masoumeh and Nasef, Mohamed Mahmoud and Miyake, Mikio and Mozarmnia, Pooria and Bazilah, Nur Anati and Emelin, Noor Fatina and Ahmad, Arshad (2019) Highly durable polybenzimidazole composite membranes with phosphonated graphene oxide for high temperature polymer electrolyte membrane fuel cells. Journal of Power Sources, 412 . pp. 238-245. ISSN 0378-7753

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Official URL: http://dx.doi.org/10.1016/j.jpowsour.2018.11.057

Abstract

Polymer electrolyte membranes with highly stable phosphoric acid loading continue to pose a challenge for the development of durable high temperature polymer electrolyte membrane fuel cells. A new class of highly conductive and durable composite membranes is prepared for high temperature fuel cell application under anhydrous conditions. 2,6-Pyridine functionalized polybenzimidazole (Py-PBI) is used as substrate for hosting phosphoric acid moiety. A highly dispersible phosphonated graphene oxide (PGO) introduced to Py-PBI substrate at different levels prior to acid doping and conductivity, durability and fuel cell performance of developed membranes are evaluated. A proton conductivity as high as 76.4 × 10−3 S cm−1 is achieved at 140 °C under anhydrous condition. A strong correlation is found between the content of PGO and the stability of the acid content despite similarity in doping level. In general, the conductivity is obviously more stable in the PGO containing membranes. A Pt-catalyzed fuel cell using the developed composite membranes show a peak power density >359 mW cm−2 at 120 °C under anhydrous condition which is above 75% improvements compared to the membranes without the phosphonated filler. This work demonstrates that the adopted membrane preparation strategy and their observed properties pave the way for highly conductive and durable proton conducting membranes.

Item Type:Article
Uncontrolled Keywords:durability, high-temperature PEM, phosphonated graphene oxide
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Energy Engineering
ID Code:87979
Deposited By: Yanti Mohd Shah
Deposited On:30 Nov 2020 21:44
Last Modified:30 Nov 2020 21:44

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