Hybrid proton conducting membranes based on sulfonated cross-linked polysiloxane network for direct methanol fuel cell

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• 作者：Jing Zhu^a ; Gang Zhang^a ; Ke Shao^b ; Chengji Zhao^a ; Hongtao Li^a ; Yang Zhang^a ; Miaomiao Han^a ; Haidan Lin^a ; Mu Li^a ; Hui Na^a ; ^{huina@jlu.edu.cn"" rel=""nofollow}
• 关键词：Hybrid ; Cross-linked ; Sulfonated ; Proton exchange membrane
• 刊名：Journal of Power Sources
• 出版年：2011
• 出版时间：15 July 2011
• 年：2011
• 卷：196
• 期：14
• 页码：5803-5810
• 全文大小：874 K

文摘

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.