期刊
MATERIALS LETTERS
卷 263, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.matlet.2019.127167
关键词
Polybenzimidazole; Nanoparticles; Composite materials; HT-PEMFC; Phosphoric acid
资金
- Basic Science Research Program National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2017R1D1A1B03033332]
We herein report an effective way to fabricate high-performance polybenzimidazole (PBI) nanocomposite membranes using sulfophenylated titanium oxide (s-TiO2) nanoparticles for application in high temperature polymer electrolyte membrane fuel cell (HT-PEMFC). The s-TiO2, multifunctional inorganic proton conductors that can improve proton conductivity and cell performance of PBI, was obtained through the surface modification. The PBI nanocomposite membranes were doped with phosphoric acid (PA) for performance evaluation. Properties such as PA doping level, proton conductivity, PA retention and cell performance were evaluated and compared to neat PBI. PA doped PBI-sTP2 (2 wt% TiO2) showed the highest doping of 12.1 and proton conductivity of 0.096 S/cm at 150 degrees C. In the cell test, peak power density of 621 mW/cm(2) was obtained, roughly 30% better performance compared to neat PBI (471 mW/cm(2)). (C) 2019 Elsevier B.V. All rights reserved.
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