The bipolar plate is a crucial component of the proton exchange membrane fuel cell (PEMFC), with their performance playing a key role in the structural stability, long term durability, efficiency, and power density. Metal bipolar plates have attracted much attention due to their low cost, outstanding mechanical properties, and effective electrical and thermal conductivity. Among these materials, titanium possesses low density, excellent airtightness, high tensile strength, and exceptional corrosion resistance in acidic environments, which makes them highly promising for use in PEMFCs. However, the corrosion resistance, electrical conductivity, hydrophobicity, and heat and mass transfer properties of titanium bipolar plates are significantly influenced by the coating materials and forming methods. Therefore, this paper first introduce the functions and requirements of bipolar plates in PEMFC. It then reviews the main research findings from recent years regarding the coating materials and forming methods of titanium bipolar plates, and concludes with a discussion of future research directions.
| 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 |