Macromolecular antioxidants for chemically durable polymer electrolyte fuel cell membranes. (28th December 2021)

• Record Type: Journal Article
• Authors: Kodir, Abdul; Shin, Sung‐Hee; Park, Satbyul; Arbi, Mutya Rahmah; Yang, Tae‐Hyun; Lee, Hyejin; Shin, Dongwon; Bae, Byungchan
• Is Part Of: International journal of energy research. Volume 46:Number 6(2022)
• Page Start: 7186
• Page End: 7200
• Publication Date: 2021-12-28
• Subjects: Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Power resources -- Research -- Periodicals; 621.042
• DOI: 10.1002/er.7607
• Languages: English
• ISSNs: 0363-907X

Abstract

Summary: We investigated macromolecular antioxidants to improve the stabilities of polymer electrolyte membranes during fuel cell operation. Fenton's oxidative test was conducted to screen the scavenging activities of five different antioxidants, and Fourier transforms infrared spectroscopy and fluoride emission, conductivity, and tensile strength analyses were employed to monitor their effects on membrane degradation. The proton conductivities and water absorption of the composite membranes were comparable to those of the pristine membrane, which may overcome issues with metal antioxidants. Moreover, open‐circuit voltage (OCV) studies confirmed their positive effects during fuel operation. The OCV study showed that the membrane containing macromolecular antioxidants maintained a higher OCV than the pristine Nafion membrane, as verified by in situ analysis. Therefore, macromolecular antioxidants are useful for increasing the chemical durabilities of fuel cell membranes. Abstract : Macromolecular antioxidants are effective in increasing PFSA membrane's oxidative durability. The antioxidant did not decrease water uptake and proton conductivity of the membrane. It also works in OCV accelerated fuel cells test.