Hydrocarbon-based electrode ionomer for proton exchange membrane fuel cells

Title
Hydrocarbon-based electrode ionomer for proton exchange membrane fuel cells
Authors
김형준장종현유성종김진영이소영채지언송광호
Issue Date
2020-11
Publisher
International journal of hydrogen energy
Citation
VOL 45, NO 57-32864
Abstract
The electrode ionomer is a key factor that significantly affects the catalyst layer morphology and fuel cell performance. Herein, sulfonated poly(arylene ether sulfone)-based electrode ionomers with polymers of various molecular weights and alcohol/water mixtures were prepared, and those comprising the alcohol/water mixture showed a higher performance than the ones prepared using higher boiling solvents, such as dimethylacetamide; this is owing to the formation of the uniformly dispersed ionomer catalyst layer. The relation between ionomer molecular weight for the same polymer structure and the sulfonation degree was investigated. Because the chain length of polymer varies with molecular weight and chain entanglement degree, its molecular weight affects the electrode morphology. As the ionomer covered the catalyst, the agglomerates formed were of different morphologies according to their molecular weight, which could be deduced indirectly through dynamic light scattering and scanning electron microscopy. Additionally, the fuel cell performance was confirmed in the current-voltage curve.
URI
http://pubs.kist.re.kr/handle/201004/72674
ISSN
0360-3199
Appears in Collections:
KIST Publication > Article
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