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In addition to the design and optimization of the catalyst layer （CL），the interface between CL and the microporous layer （MPL） also needs to be considered for the research of membrane electrode assembly （MEA）. In this paper，three different CL/MPL interface structures are fabricated to verify their effect on PEMFC performance and durability under simulated vehicle operating conditions. The performance test results show that the performance of the MEA sample obtained by introducing Nafion ionomers into the CL/MPL interface （MEA-Nafion） decreases slightly compared with the pristine sample （MEA-0） at high current density，whereas the performance of the MEA sample obtained by introducing Nafion ionomers into the CL/MPL interface followed by hot pressing （MEA-Nafion-HP） is basically the same as that of MEA-0. Specially，the durability test results under simulated vehicle conditions show that the voltage decay rates of MEA-0，MEA-Nafion，and MEA-Nafion-HP samples are 42.3，29.9 and 15.2 μV/h，respectively. In conclusion，the MEA durability can be greatly improved without affecting performance by optimizing the CL/PEM interface structure design.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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