POSCO helps shape the future of cars to be safer and more eco-friendly.
Cars that are lighter and safer based on Giga Steel, electric steel plates, anode and cathode.
These are some of the things that we can provide for the cars of the future.
This is a device designed to generate electricity continuously through a reaction between hydrogen and oxygen. Consisting of stacked cells, it serves as the engine for a fuel cell electric vehicle.
The bipolar separator provides a channel for oxygen and air, connects electricity created at each cell and provides mechanical support. For this application, stainless steel1) which can withstand harsh conditions is commonly used. Compared to graphite, which is expensive and vulnerable to impacts, POSCO’s Poss470FC2) is reasonably priced, rigid and easy to form. Most of all, it contains chromium, thus defying rust and featuring high conductivity.
Comparison of the oxide film between stainless steel and carbon steel
|Stainless steel||Carbon steel|
Reaction at the anode: H2 → 2H+ + 2e-
Reaction at the cathode: ½ O2 + 2H+ + 2e- → H2O
Total reaction: H2 + ½ O2 → H2O + electricity + thermal energy