Fuel Cell Membranes

Pintauro, Peter N.

doi:10.1002/9780470276280.ch29

Cited by 4 publications

(1 citation statement)

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“…Proton conducting polymer electrolyte membranes have been extensively investigated for the applications in fuel cells during the last decade [2][3][4][5][6][7][8]. Nafion ® is regarded as the best known membrane separator for PEMFC and the development of increasingly advanced perfluorosulphonic acid (PFSA) gradually extends the range of conditions of use of this family of proton conducting materials [6,9,10].…”

Section: Introductionmentioning

confidence: 99%

Proton Conducting Sulphonated Fluorinated Poly(Styrene) Crosslinked Electrolyte Membranes

Soules¹,

Améduri²,

Boutevin³

et al. 2011

Fuel Cells

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Potential membranes for polymer electrolyte membrane fuel cell based on crosslinked sulphonated fluorinated polystyrenes (PS) were synthesised in two steps. First, azide‐telechelic polystyrene was obtained by iodine transfer polymerisation of styrene in the presence of 1,6‐diiodoperfluorohexane followed by azido chain‐end functionalisation. Then azide‐telechelic polystyrene was efficiently crosslinked with 1,10‐diazido‐1H,1H,2H,2H,9H,9H,10H,10H‐perfluorodecane under UV irradiation. After 45 min only, almost completion of azide crosslinking could be achieved, resulting in crosslinked membranes with insoluble fractions higher than 95%. The sulphonation of the crosslinked membranes afforded ionic exchange capacities (IECs) ranging from 2.2 to 3.2 meq g–1. The hydration number was shown to be very high (from 30 to 75), depending on both the content of perfluorodecane and of sulphonic acid groups. The morphology of the membranes, assessed by small‐angle X‐ray scattering, was found to be a lamellar‐type structure with two types of ionic domains. For the membrane that exhibited an IEC value of 2.2 meq·g–1, proton conductivity was in the same range as that of Nafion® (120–135 mS·cm–1), whereas the membrane IEC value of 3.2 meq·g–1 showed a proton conductivity higher than that of Nafion® in liquid water from 25 to 80 °C, though a high water uptake.

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