Fuel cells have become a viable eco-friendly power source, and advancements in the technology continue to be made. As fuel cell technology improves, the importance of using high-purity fuel cell graphite in cells’ bipolar plates is becoming increasingly evident. Here’s a look at the role of graphite within fuel cells and why the quality of graphite used is important.
Bipolar plates sandwich most of the components within a fuel cell, and they perform multiple functions. These plates distribute fuel and gas into the plate, prevent gases and moisture from leaking out of the plate, remove heat from the active electrochemical portion of the cell, and conduct electrical currents between cells.
In most setups, multiple fuel cells are stacked on one another to produce the amount of power that’s required. Bipolar plates are thus responsible not just for leakage prevention and thermal conductivity within a plate, but also for electrical conductivity between fuel cells’ plates.
Leakage prevention, thermal conductivity and electrical conductivity are the three characteristics of bipolar plates that make high-quality graphite an ideal material to use in these components.
VET Energy Technology Co., Ltd （Miami Advanced Material Technology Co., LTD）is a high-tech enterprise focusing on the production and sales of graphite products .It has a history of bipolar plate processing for more than 20 years.
| Processing length of single plate | Processing width of single plate | Processing thickness of single plate | Minimum thickness for processing single plate | Recommended operating temperature |
| customized | customized | 0.6-20mm | 0.2mm | ≤180℃ |
| Density | Shorehardness | Shorehardness | FlexuralStrength | Electricalresistivity |
| ＞1.9g/cm3 | ＞1.9g/cm3 | ＞100MPa | ＞50MPa | ＜12µΩm |
Anti-explosion performance test of adhesive plate (method from American fuel bipolar plate company)
The special tooling locks the four sides of the adhesive plate with a torque wrench of 13N.M, and pressurizes the cooling chamber. The adhesive plate will not be opened and leaked when the air pressure intensity is ≥4.5KG(0.45MPA)
Air tightness test of adhesive plate
Under the condition of pressurizing the cooling chamber with 1KG(0.1MPA) , there is no leakage in the hydrogen chamber, oxygen chamber and outer chamber.
Contact resistance measurement
Single-point contact resistance:＜9mΩ.cm2 Average contact resistance:＜6mΩ.cm2
Post time: May-12-2022