[16p-M_103-1~11] 12.3 Functional Materials and Novel Devices

3:15 PM - 3:30 PM JST(6:15 AM - 6:30 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[16p-M_103-6] Design of Swelling Suppression in Polymer Electrolyte Membranes Based on Highly Swellable Cellulose Nanofibers

〇(M1)Takashi Nagata¹, Takashi Katoh², Akito Masuhara^1,3 (1.Grad. Sch. of Sci. and Eng., Yamagata Univ., 2.OJI HD, 3.FROM, Yamagata Univ.)

Keywords:

polymer electrolyte fuel cells,polymer electrolyte membranes,cellulose nanofibers

Perfluorosulfonic acid (PFSA) membranes provide high proton conductivity for polymer electrolyte fuel cells (PEFCs), but their use is increasingly constrained by cost, environmental impact, and PFSA regulations. Phosphorylated cellulose nanofibers (P-CNFs) are attractive PFSA alternatives. However, excessive swelling under hydrated conditions limited practical use. In this study, we report a composite PEM with improved dimensional stability by introducing polydopamine-coated cellulose nanofibers (CNF@PDA). CNF@PDA was prepared via a polymerization-with-fiber (PwF) method and blended with P-CNF to fabricate composite membranes. The resulting membranes substantially suppressed swelling while maintaining efficient proton transport, indicating the promise of P-CNF/CNF@PDA composites as environmentally benign PEMs for next-generation PEFCs.