Robust anion conductive polymers containing perfluoroalkylene and pendant ammonium groups for high performance fuel cells

被引:102
作者
Ono, Hideaki [1 ]
Kimura, Taro [1 ]
Takano, Aoi [2 ]
Asazawa, Koichiro [2 ]
Miyake, Junpei [3 ]
Inukai, Junji [3 ]
Miyatake, Kenji [3 ,4 ]
机构
[1] Univ Yamanashi, Interdisciplinary Grad Sch Med & Engn, 4 Takeda, Kofu, Yamanashi 4008510, Japan
[2] Daihatsu Motor Co Ltd, Frontier Technol R&D Div, 3000 Ryuo, Shiga 5202593, Japan
[3] Univ Yamanashi, Clean Energy Res Ctr, 4 Takeda, Kofu, Yamanashi 4008510, Japan
[4] Univ Yamanashi, Fuel Cell Nanomat Ctr, 4 Takeda, Kofu, Yamanashi 4008510, Japan
基金
日本科学技术振兴机构;
关键词
EXCHANGE MEMBRANES; POTASSIUM HYDROXIDE; QUATERNARY AMMONIUM; ALKALINE STABILITY;
D O I
10.1039/c7ta09409d
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A novel series of ammonium-containing copolymers (QPAF-4) were designed and synthesized as anion exchange membranes for alkaline fuel cell applications. The copolymers were prepared via a nickel promoted polycondensation reaction with high molecular weights (M-w = 72.7-276.4 kDa as precursors) and were composed of perfluoroalkylene and fluorenyl groups with pendant ammonium groups. The QPAF-4 membrane with optimized copolymer composition and ion exchange capacity exhibited high hydroxide ion conductivity (86.2 mS cm(-1) in water at 80 degrees C) and excellent mechanical properties (large elongation at break = 269%). A severe alkaline stability test of the QPAF-4 membranes in 1 M KOH at 80 degrees C for 1000 h and the post-test analyses of the H-1 NMR spectra, solubility, and mechanical properties revealed minor, or no, changes in the chemical structure and properties. Alkaline fuel cells using the QPAF-4 membrane were operated using hydrazine as a fuel and oxygen or air as oxidant to achieve the high maximum power density of 515 mW cm(-2). The durability of the membrane was also confirmed in the operating fuel cell at a constant current density for longer than 1000 h.
引用
收藏
页码:24804 / 24812
页数:9
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