Unlike batteries, which rely on materials in limited supply, the technology could be produced cheaply using materials that are readily available. Possible to charge electric cars while they are travelling across it.
4 points
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Completely changing the construction method of the foundation of a whole house, making it out of 90% cement/10% electrolyte (releasing 200 extra tonnes of CO2) rather than 20% cement/80% gravel and increasing costs by tens of thousands for the same effect as a 70kg $2.5k rrp battery (which will be a 50kg $500 battery in two years)?
Doesn’t seem huge other than in the literal size sense.