this post was submitted on 17 Aug 2024
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I don't know why they said this — they really aren't a viable alternative for weight-sensitive contexts at all. Their density is only abut 60% that of Li-ion batteries, and that isn't even getting into solid-state Li batteries which are even more dense. If weight isn't an issue, like for home or grid backup storage, they're fine. For cars or bikes, not so much.
The volumetric energy density is 60% of lithium ion batteries, but the energy density per kg is more like 75% since the batteries are lighter. Assuming that scales to the ev range, that’s probably sufficient for a lot of use cases.
I could see it being useful for semi trucks where volume isn't as much of an issue, especially if the batteries are hanging under the trailer.
Too much weight. Thus far, electric semi trucks aren't viable outside of shorter range delivery fleets.