期刊
ACS APPLIED ENERGY MATERIALS
卷 5, 期 8, 页码 10023-10033出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.2c01647
关键词
anion-exchange membrane; rigid side chain; imidazole-functionalized cationic group; alkali stability; degradation; maximum power density
资金
- National Natural Science Foundation of China [51773112, 51873100]
- Sanqin scholars innovation teams in Shaanxi Province, China
- International Science and Technology Cooperation Project of Shaanxi Province, China [2021KW-20]
A series of AEM membranes with different side chains and high-density cationic groups have been prepared for AEM fuel cells. These membranes exhibit high conductivity and acceptable physical properties, and density functional theory studies confirm their excellent alkali stability.
A series of rPES(x/y)-MI membranes with different rigid side chains and high-density imidazole cationic groups have been prepared for anion-exchange membrane (AEM) fuel cells (AEMFC). These AEM rP ES (x/y)-MIs with IEC values of 1.91-2.31 mequiv g(-1) exhibit high conductivities of 92.92-142.69 mS cm(-1) at 80 degrees C, acceptable water uptake, and dimensional change. Density functional theory (DFT) was used to demonstrate the excellent alkali stability of this class of copolymers, which is consistent with experimental results. In addition, the degradation mechanism of this type of AEM has also been investigated. Significantly, rPES(1/4)-MI-based AEMFC has the maximum power density of 195 mW cm(-2) at a current density of 525 mA cm(-2), which is much higher than commercial reference membrane FAS-30 measured in the same environment.
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