Yes, I would think they could be charged more quickly than a lead acid battery. Most batteries don’t like being flash-charged—there’s a loss of energy, and stress on the plate structure. Would it be a good combination? It might well be.
But, it’s hard to beat a man at his own game—I think battery designers may have thought of this. Maybe they don’t consider the super-cap technology mature enough. Maybe there’s another issue. Battery design is its own specialty.
Maybe maybe maybe, the battery scientists are just like "climate scientists" solar developers and race baiters.
Battery design is its own specialty.
Just like the above specialists, they wouldn't want to actually solve a problem and see their lucrative gubmint funding-stream dry up.