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Properties of PFSA/PVDF Coaxial Core-Shell Fiber Proton Exchange Membranes

Authors： Gao Min, Yu Weiming, Wang Xiaozhou, Cui Fujun, He Gaohong, Wu Xuemei

Units： State Key Laboratory of Fine Chemicals, Dalian University of Technology, Membrane Science and Technology Research and Development Center, Dalian 116024, Liaoning, China; Panjin Institute of Industrial Technology, Dalian University of Technology, Panjin 124221

KeyWords： proton exchange membrane; electrospinning; core-shell fiber; fuel cell; proton transport channel

ClassificationCode：TM911.42

year,volume(issue):pagination： 2022,42(6):94-100

Abstract：

Construction of coaxial electrospun PFSA/PVDF proton exchange membrane with core-shell fiber structure. The PFSA shell fiber in the coaxial fiber provides long-range proton transmission channels and high electrical conductivity, the PVDF core fiber provides strong mechanical properties and anti-swelling properties, and the coaxial fiber confinement effect The PFSA component in the primary core fiber enhances the adhesion The interface of PFSA and PVDF is combined. Compared with the blended cast membrane and the uniaxial electrospun membrane, the coaxial electrospun membrane exhibited higher mechanical strength, proton conductivity and battery performance under low swelling conditions. The maximum tensile strength of the coaxial electrospun membrane is 60.8 MPa, which is 55.5% higher than that of the uniaxial electrospun membrane (39.1 MPa); its maximum tensile strain is 180.2%, which is 122.5% higher than that of the cast membrane. At 80 °C, the proton conductivity of the coaxial electrospun membrane is as high as 206.9 mS/cm, which is comparable to that of Nafion 211, and its peak power density is 941.7 mW/cm2, which is 80.9% higher than that of the cast membrane, and higher than that of the uniaxial electrospun membrane (748.9 mW/cm2) increased by 25.7%. The coaxial electrospun membrane also showed excellent gas barrier and antioxidant properties. Studies have shown that coaxial electrospun proton exchange membranes have better prospects for fuel cells.

Funds：

辽宁省化学助剂合成与分离省市共建重点实验室2020年开放课题(ZJKF2012）；国家自然科学基金创新研究群体项目(22021005)；中央高校基本科研业务费(DUT21ZD406)

AuthorIntro：

高敏（1996-），女，河南商丘人，硕士，质子交换膜及燃料电池

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