pagheca
Active member
Interesting contribution. I share your view that none of these questions can be answered through a CEO interview or YouTube commentaries by others.A solid state battery was initially described as having a Li-metal anode and solid electrolyte. It was imagined reaching a gravimetric energy density of 800 Wh/kg or more. I can see no indication of Donut having built what we initially understood as a solid state battery. The density seems to low. Also, based on the dendrite build-up issue of the Li-metal anode, the cycle-life seems too high, even if the issue is solved. I don't believe they've solved the Li-metal anode.
But it seems the solid state definition has changed. An NMC battery could be built with a solid electrolyte. It wouldn't improve the energy density much, and we'd call it a semi solid-state cell. But it seems everything with a solid electrolyte can be called solid-state these days. Being able to mass produce an ss-battery gives much publicity, even if the solid state definition has been watered down.
The hybrid supercapacitor idea and the sciencedirect article is interesting. The combination of energydensity and powerdensity claimed by Donut is much higher than anything shown publicly so far. It would be cool if this is real. But such claims usually turn out to be exaggerated when the final product appears. Could it be they're just listing theoretical limits of their technology that can't actually be acheived in combination? Is this just the data for the chemistry, and the densities are lower on cell level? Hoping it's real thougo
Once again: YouTube channels without solid links to reliable sources are not reliable themselves: they’re marketing or entertainment at best. They might introduce us to topics we didn’t know about, but it’s up to us to investigate further using primary sources (assuming we have the time and the necessary expertise).
As Carl Sagan said: “Extraordinary claims require extraordinary evidence.”
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