Composite Polymer Electrolyte Membranes based on Nafion and Modified PVDF Electrospun Nanofiber Mats
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https: //doi. org/10.1007/s11595-020-2306-5
Composite Polymer Electrolyte Membranes based on Nafion and Modified PVDF Electrospun Nanofiber Mats HE Yining1, WANG Di1, LI Qiong1, 2*, HUANG Leping1,3, BAO Haifeng1,3
(1. School of Materials Science and Engineering, Wuhan Textile University, Wuhan 430200, China; 2. High-Tech Organic Fibers Key Laboratory of Sichuan Province, Chengdu 610072, China; 3. State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, China)
Abstract: We fabricated the nanofiber composite membranes by impregnating Nafion into the modified polyvinylidene fluoride(PVDF) electrospinning nanofiber mat for proton exchange membrane fuel cells applications. The hydrophobic PVDF nanofibers mat became to the hydrophilic state by alkali treatment for the full embedding of Nafion into the PVDF network. The fabricated composite membranes exhibit significantly enhanced thermal stabilities, swelling resistance, and observably improved mechanical property compared to the pristine Nafion membrane. When the content of PVDF nanofiber mat is 15.1wt% in the membrane, the proton conductivity of the nanofiber composite membrane is nearly equal to that of pristine Nafion membrane with the same condition. The experimental results show that the prepared composite membrane can be used as a promising polyelectrolyte membrane for fuel cell applications. Key words: proton exchange membrane; hydrophilic treatment; PVDF; electrospinning
1 Introduction Proton exchange membrane fuel cell (PEMFC) is increasingly applied to mobile vehicles, portable equipment, stationary energy storage due to its high efficiency and environmental compatibility[1,2]. As one of the crucial components of PEMFC, proton exchange membrane (PEM) primarily influences the performance and durability of PEMFC. Up to now, Nafion Perfluorosulfonic acid from DuPont as a typically commercialized polymer electrolyte memb rane has been used to PEMFC on account of its excellent electrochemical property, acceptable mechanical strength, and good chemical stability[3,4]. However, the major drawbacks of Nafion are expensive cost, low dimensional stability, and durability in the operation of PEMFC, which hinder its further widespread commercial applications[2,5-8]. To overcome the obstacles, considerable researches have tried to develop various membranes, including modified Na© Wuhan University of Technology and Springer-Verlag GmbH Germany, Part of Springer Nature 2020 (Received: Dec. 12, 2019; Accepted: Mar. 18, 2020) HE Yining(何贻宁): E-mail: [email protected] * Corresponding author: LI Qiong(李琼): Assoc. Prof.; Ph D; E-mail: [email protected] Funded by the National Science Foundation of China (21673167), and the Open Project Program of High-Tech Organic Fibers Key Laboratory of Sichuan Province
fion-based membranes, partially fluorinated polymer, nonperfluorinated polymer and inorganic-organic composites[9-15]. Recent research reports demonstrate that modification of Nafion-based membranes is a
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