1. Enhanced performance and durability of composite membranes containing anatase titanium oxide for fuel cells operating under low relative humidity.
- Author
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Kim, Ae Rhan, Vinothkannan, Mohanraj, Lee, Kyu Ha, Chu, Ji Young, Park, Byung‐Hyun, Han, Myung‐Kwan, and Yoo, Dong Jin
- Subjects
TITANIUM oxides ,COMPOSITE membranes (Chemistry) ,PROTON exchange membrane fuel cells ,HUMIDITY ,FUEL cells ,OLIGOMERS - Abstract
Summary: 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°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. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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