Bipolar plates (BPP) comparison
Typical properties | Extruded BPP | Injection molded BPP | Hot-pressed BPP | SGL Carbon bipolar foil | SGL Carbon |
---|---|---|---|---|---|
Explanation | Polymer composite | Polymer composite | Polymer composite | Expanded graphite based bipolar foils SIGRACELL TF6 and PV15 | Machined extruded graphite - resin impregnated |
Process ability | +++ | ++ | + | +++ | - |
Electrical conductivity | ○ | + | ++ | ++ | +++ |
Surface tolerance | - | ○ | - | ++ | ++ |
Costs | +++ | + | ○ | ○ | - |