[9a-B12-1~10] 12.3 Functional Materials and Novel Devices

10:00 AM - 10:15 AM JST(1:00 AM - 1:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[9a-B12-4] Proton-Conducting Polymer Electrolytes Utilizing Two-Dimensional Nano-spaces Formed by Nanophase Separation

〇Mao Ishiyama¹, Shotaro Nishitsuji³, Shusaku Nagano⁴, Hinako Ebe², Jun Matsui² (1.Grad. Sch. of Sci and Eng., Yamagata Univ., 2.Fac. of Sci., Yamagata Univ., 3.Grad. Sch. of Org. Mater. Sci., Yamagata Univ., 4.Coll. of Sci., Rikkyo Univ.)

Keywords:

proton conductivity,polymer electrolyte,lamellar structure

Amphiphilic comb copolymers possessing hydrophobic alkyl chains and proton-donating alanine side chains were investigated as proton-conducting polymer electrolytes. Thin films of p(ODA30-stat-Ala70) formed well-defined lamellar structures after humid annealing above 60 °C, as confirmed by out-of-plane XRD measurements. The resulting nanophase-separated structure is expected to contain two-dimensional hydrophilic nanochannels composed of alanine side chains. Proton conductivity measurements under 95% RH revealed a significant increase in conductivity above the lamellar formation temperature. The enhanced proton transport is attributed to efficient proton hopping through hydrogen-bond networks formed within the confined two-dimensional nanochannels.