Attention, feederline!
You can not compare TESLA to this Quant-e nanoflux technology! It is most probably - a scam. No patents, no public proof, ... But a lot of excellent PR. The CEO, Nunzio La Vecchia, is a doubious person, a musician with no scientific backgrond.
The energy density of the best redox-flow cells is 50 kW/kg, here they are claiming 600 kW/kg. Chemically it seems to be a paradox-flow cell. A big questionmark.