RE: AimChaos post.16 Jul 2018 14:17
Faramog, some companies make a big deal about the stack - to be honest there is very little to it, a membrane (Nafion is standard) some carbon felt to increase the surface conduction to the electrolyte, a bipolar plate, made of carbon composite, and , er that's it. Bolt a bunch of these together with some kind of fluoropolymer gasket around the outside and there you have it.
Obviously there are some that do things slightly differently - interdigitated conduction paths, welded stack edges, making it uber large like Thyssen-Krupp, but to be honest this is all standard stuff that has been known for 20 years.
At current prices much more than 40%, probably nearer 60%, of the cost of a reasonable sized (1MWh) VRFB is going to be the electrolyte, and it is this simply and inescapable fact that puts BMN in the best seat in the house.