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Preparation and properties of sulfonated poly(ether ether ketone) blended poly(aryl ether benzimidazole) proton exchange membrane

Authors： SONG Jierui, XIAO Yiming, ZHANG Lei, XIANG Jun, TANG Na, CHENG Penggao, ZHANG Jianping, WANG Songbo, DU Wei

Units： College of Chemical Engineering and Materials，Tianjin University of Science & Technology Tianjin 300457，China

KeyWords： Polybenzimidazole; Sulfonated poly(ether ether ketone); Proton exchange membrane; Proton conductivity; Phosphoric acid loss ratio

ClassificationCode：O631

year,volume(issue):pagination： 2022,42(1):1-9

Abstract：

In this work, we aimed to solve the problem of phosphoric acid leaching and improve the proton conductivity and mechanical strength of phosphoric acid polybenzimidazole (PA-PBI) proton exchange membrane. The phosphoric acid doped proton exchange membranes were prepared by casting method via co-blending high sulfonation degree branched-chain sulfonated polyether ether ketone (bSPEEK) and poly(aryl ether benzimidazole) (OPBI). The volume swelling ratio of the blend membrane decreased by 26.5%, and the mechanical strength increased by 83.7% under the optimal content of bSPEEK (30% w/w). And the proton conductivity in high temperature range (160 oC/0% RH) and low temperature range (80 oC/98% RH) increased by 43.8 % and 29.1%, respectively. The phosphoric acid loss in low temperature range decreased by 48%. In conclusion, the mechanical strength and proton conductivity of the co-blend membrane were improved as well as effectively inhibiting the loss of phosphoric acid.

Funds：

中国自然科学基金（U20A20148）；天津市自然科学基金（18JCZDJC37200）；天津市科技计划项目（18YFZCSF00330）；天津市教委创新研究团队（TD13-5008）；长江学者与高校创新研究团队（IRT-17R81）。

AuthorIntro：

宋洁瑞（1995-），女，甘肃兰州人，研究生，研究方向为燃料电池关键材料

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