Triple-layer sulfonated poly(ether ether ketone)/sulfonated polyimide membranes for fuel cell applications
Xiaobai Li, Yang Song, Zhuang Liu, Pengju Feng +4
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70% confidenceA series of triple-layer membranes were prepared with improved mechanical properties, lower water uptake, and swelling ratio compared to single-component membranes.
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Abstract
A series of triple-layer membranes were prepared based on a sulfonated polyimide (SPI) and a traditional sulfonated poly(ether ether ketone) (SPEEK) polymer matrix. Compared with the single-component membranes (pure SPI and SPEEK), the multicomponent membranes exhibited better comprehensive performance. Interestingly, the triple-layer membranes possessed improved mechanical properties, lower water uptake, and swelling ratio than those of the corresponding blend membranes. When the contents of SPI were 30 and 40%, the triple-layer membranes even had lower methanol permeability (3.42 and 2.61 × 10 −7 cm 2 s −1 , respectively) than that of the pure SPI membrane (3.51 × 10 −7 cm 2 s −1 ). The proton conductivity of the triple-layer membranes was in the range of 0.117–0.149 S cm −1 at 100°C. All the results suggest that the triple-layer membranes have sufficiently excellent performance to be applied in fuel cells.
Key findings
- The triple-layer membranes had lower methanol permeability than the pure SPI membrane.
- The proton conductivity of the triple-layer membranes was in the range of 0.117-0.149 S cm⁻¹ at 100°C.
- The triple-layer membranes exhibited better comprehensive performance compared to single-component membranes.
Keywords
Identifiers
- Journal
- High Performance Polymers
- Year
- 2013