New capacitor with 19-times energy density

Re:New capacitor with 19-times energy density by mitthrowaway2 on Wednesday May 08, 2024 @01:01PM (#40300373)

I don't think the intent is to use the capacitor as a substitute for battery energy storage, but as a complement. I don't think these would be a good fit for EVs, but for supercharger stations maybe? Charge/discharge efficiency and cycle lifetime will probably be higher than a battery, and in stationary applications, cost matters more than weight or volume. Of course cost depends on production volume, which isn't something you can measure in the lab, so who knows.

It might also pair well with battery chemistries that are good for energy density but poor on power density, like lithium-sulfur or LFP.

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Re:New capacitor with 19-times energy density by cogman10 on Thursday May 09, 2024 @02:10PM (#40311094)

For an EV, they could be useful in stopping/starting. Rather than having regen go to the battery you could first send it to a capacitor which then trickle charges the battery (reducing wear). And rather than pulling directly from the battery, you could pull from a capacitor first to get to cruising speed. That would allow the battery to slowly discharge into the capacitor rather than going directly into the motor at full force.

You'd play to capacitors high cycle life and fast charging/discharging capabilities rather than their density.

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Re:New capacitor with 19-times energy density by _carbyau_ on Friday May 10, 2024 @01:53AM (#40315816)

Maybe it could be used in a similar fashion for the hybrids out there.

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