کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1288930 | 973279 | 2011 | 8 صفحه PDF | دانلود رایگان |
A series of novel hybrid membranes based on sulfonated poly(arylene ether ketone)s (SNPAEKs), polysiloxane (KH-560) and sulfonated curing agent (BDSA) has been prepared by sol–gel and cross-linking reaction for direct methanol fuel cells (DMFCs). All the hybrid membranes (SKB-xx) show high thermal properties and improved oxidative stability compared with the pristine SNPAEK membrane. The sulfonated cross-linked polysiloxanes networks in the hybrid membranes enhance the mechanical properties and reduce the swelling ratio. The swelling ratio of SKB-20 is 22%, which is much lower than that of the pristine SNPAEK (37%) at 80 °C. Meanwhile, SKB-xx membranes with greatly reduced methanol permeabilities show comparative proton conductivities to pristine SNPAEK membranes. Notably, the proton conductivities of SKB-5 and SKB-10 reach to 0.192 S cm−1 and 0.179 S cm−1 at 80 °C, respectively, which are even higher than the 0.175 S cm−1 of SNPAEK.
Figure optionsDownload as PowerPoint slideHighlights
► A novel hybrid membrane is prepared for DMFC.
► Side-chain-type SNPAEK acts as matrix.
► KH-560 forms polysiloxane cross-linked structure.
► BDSA acts as both curing agent and proton conductor.
Journal: Journal of Power Sources - Volume 196, Issue 14, 15 July 2011, Pages 5803–5810