TY - JOUR
T1 - High-Performance Fuel Cell Operable at 120 °c Using Polyphenlyene Ionomer Membranes with Improved Interfacial Compatibility
AU - Long, Zhi
AU - Miyatake, Kenji
N1 - Funding Information:
This work was partly supported by the New Energy and Industrial Technology Development Organization (NEDO), the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan, through Grants-in-Aid for Scientific Research (18H02030, 18H05515, 18K19111), Japan Science and Technology (JST) through SICORP, JKA promotion funds from AUTORACE, and by the thermal and electric energy technology foundation.
Publisher Copyright:
© 2021 American Chemical Society.
PY - 2021/4/7
Y1 - 2021/4/7
N2 - While the performance and durability of proton exchange membrane fuel cells (PEMFCs) have been considerably improved over the last decade, high-temperature operation (above 100 °C) is still an issue. We designed a sulfonated polyphenylene containing tetrafluorophenylene groups (SPP-QP-f) for high-temperature and low-humidity operation of PEMFCs. Compared to state-of-the-art perfluorinated PEMs and the previous polyphenylene ionomer membrane with no fluorine-containing groups, the SPP-QP-f membrane exhibited superior proton conductivity under all testing conditions (80-120 °C, 20-95% RH). Because of the improved interfacial compatibility with the catalyst layers, the SPP-QP-f membrane induced high cathode catalytic activity. These attractive properties of the SPP-QP-f membrane resulted in high fuel cell performance (390 mW cm-2 maximum power density) at 120 °C and 30% RH. The durability was confirmed under accelerated degradation conditions (100 °C, 30% RH) for 1000 h.
AB - While the performance and durability of proton exchange membrane fuel cells (PEMFCs) have been considerably improved over the last decade, high-temperature operation (above 100 °C) is still an issue. We designed a sulfonated polyphenylene containing tetrafluorophenylene groups (SPP-QP-f) for high-temperature and low-humidity operation of PEMFCs. Compared to state-of-the-art perfluorinated PEMs and the previous polyphenylene ionomer membrane with no fluorine-containing groups, the SPP-QP-f membrane exhibited superior proton conductivity under all testing conditions (80-120 °C, 20-95% RH). Because of the improved interfacial compatibility with the catalyst layers, the SPP-QP-f membrane induced high cathode catalytic activity. These attractive properties of the SPP-QP-f membrane resulted in high fuel cell performance (390 mW cm-2 maximum power density) at 120 °C and 30% RH. The durability was confirmed under accelerated degradation conditions (100 °C, 30% RH) for 1000 h.
KW - fuel cells
KW - interfacial compatibility
KW - partial fluorination
KW - polyphenylenes
KW - proton exchange membranes
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U2 - 10.1021/acsami.1c04270
DO - 10.1021/acsami.1c04270
M3 - Article
C2 - 33755439
AN - SCOPUS:85104047153
SN - 1944-8244
VL - 13
SP - 15366
EP - 15372
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
IS - 13
ER -