In northern Switzerland, a construction team is hard at work excavating a hole in the ground that will end up being over 88 ft (27 m) deep, and spanning the length of two soccer pitches. This pit will be home to Switzerland's first redox flow battery for storing clean energy – and it'll be the most…
If this is some sort of hybrid battery that could be possible… Super capacitors take the initial charge, pass it on to the flow battery. But as far as I know, absorbing or releasing a lot of energy quickly is just not what flow batteries do, it’s their biggest limitation.