无水的
电解质
质子化
质子交换膜燃料电池
材料科学
功率密度
化学工程
电极
聚合物
化学
燃料电池
有机化学
复合材料
功率(物理)
离子
物理化学
工程类
物理
量子力学
作者
Katie Heeyum Lim,Albert S. Lee,Vladimir Atanasov,Jochen Kerres,Eun Joo Park,Santosh Adhikari,Sandip Maurya,Luis Delfin Manriquez,Jiyoon Jung,Cy Fujimoto,Ivana Matanović,Jasna Janković,Zhendong Hu,Hongfei Jia,Yu Seung Kim
出处
期刊:Nature Energy
[Springer Nature]
日期:2022-01-31
卷期号:7 (3): 248-259
被引量:82
标识
DOI:10.1038/s41560-021-00971-x
摘要
State-of-the-art automotive fuel cells that operate at about 80 °C require large radiators and air intakes to avoid overheating. High-temperature fuel cells that operate above 100 °C under anhydrous conditions provide an ideal solution for heat rejection in heavy-duty vehicle applications. Here we report protonated phosphonic acid electrodes that remarkably improve the performance of high-temperature polymer electrolyte membrane fuel cells. The protonated phosphonic acids comprise tetrafluorostyrene-phosphonic acid and perfluorosulfonic acid polymers, where a perfluorosulfonic acid proton is transferred to the phosphonic acid to enhance the anhydrous proton conduction of fuel cell electrodes. By using this material in fuel cell electrodes, we obtained a fuel cell exhibiting a rated power density of 780 mW cm–2 at 160 °C, with minimal degradation during 2,500 h of operation and 700 thermal cycles from 40 to 160 °C under load. High-temperature polymer electrolyte membrane fuel cells are promising for heavy-duty vehicle applications, but strides in performance are needed to improve their commercial viability. Here it is demonstrated that protonating phosphonic acid electrodes greatly enhances power density and durability.
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