High-performance corrosion-resistant fluorine-doped tin oxide as an alternative to carbon support in electrodes for PEM fuel cells

Title
High-performance corrosion-resistant fluorine-doped tin oxide as an alternative to carbon support in electrodes for PEM fuel cells
Authors
채근화함형철김진영조민경박희영김종민이경아이여진김성훈윤기로변아영강윤식
Issue Date
2019-11
Publisher
Nano energy
Citation
VOL 65-104008-12
Abstract
The advent of new technologies and growing demand for fuel cell innovation has led to the development of novel non-carbon material strategies with inherent electrical conductance and corrosion resistance. Problems are often observed with carbon-based support materials, due to their limited electrochemical stability. The emphasis is therefore on fabricating high-performance, stable non-carbon alternatives that exhibit advantageous electrochemical properties compared to conventional carbon black, and are thus regarded as ideal electrocatalyst support materials. In this work, we investigated the influence of dopants, and the morphology of conductive, porous doped tin-based oxides, on corrosion resistance and electrical conductivity for fuel cell electrode applications. Among the various doping elements, fluorine anion doping into tin oxide plays a key role in the formation of such structures as a complexing agent for improving electrical conductivity and suppressing electrochemical dissolution processes. When used in polymer electrolyte membrane fuel cells with platinum electrocatalyst loading, fluorine tin oxide nanotubes exhibit not only cell performance comparable to that of state-of-the-art commercial Pt/C, but also excellent cycling stability. The superior electrochemical performance and stability of this novel non-carbon support material is due to its unique features, i.e., excellent electrical conductivity, electrochemical corrosion resistance, and electronic and compressive strain effects due to strong metal-support interactions.
URI
http://pubs.kist.re.kr/handle/201004/70601
ISSN
2211-2855
Appears in Collections:
KIST Publication > Article
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