Journal
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
Volume 46, Issue 4, Pages 4835-4851Publisher
WILEY
DOI: 10.1002/er.7477
Keywords
anatase TiO2; composite membrane; durability; low humidity condition; performance; proton conductivity
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Funding
- Ministry of Science, ICT and Future Planning [NRF-2020R1A2B5B01001458]
- National Research Foundation (NRF) [NRF-2017R1A5A2015061]
- Ministry of Education [NRF-2021R1I1A1A0105090511]
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The study prepared a series of composite membranes by doping different proportions of S-An-TiO2, revealing that 15wt% S-An-TiO2 significantly enhanced the performance of the composite membrane. Under continuous 60°C and 20% relative humidity conditions, the 1.5 wt% SDBC/S-An-TiO2 composite membrane exhibited high current output, power output, and durability.
In this work, sulfonated diblock copolymers (SDBCs) were prepared by polycondensation of sulfonated poly(ether-ether-ketone) (SPEEK) and hydrophobic oligomer, which were combined with sintered anatase titanium oxide (S-An-TiO2) to create a hybrid membrane for apply in proton exchange membrane fuel cells (PEMFCs) operating with low relative humidity (RH). Then, a series of composite membranes (SDBC/S-An-TiO2) were prepared by varying the wt% of S-An-TiO2 blended with SDBC. The results showed that appropriate quantity (ie, 15 wt%) of S-An-TiO2 can significantly improve the proton conductivity and physiochemical properties of prepared composite membrane, as well as the PEMFC performance and durability under 20% RH. The 1.5 wt% of SDBC/S-An-TiO2 offers high current output, power output, and durability values at 60 degrees C under 20% RH, which are 0.207 A cm(-2), 0.074 W cm(-2) and over 90 hours, respectively. These results can be attributed to the good interfacial compatibility between S-An-TiO2 and SDBC.
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