this post was submitted on 24 Apr 2025
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Applying 'extreme heat' to lithium-ion batteries reportedly restores their capacity, and I think it's the sustainable tech breakthrough of 2025 (www.techradar.com)
submitted 2 days ago by floofloof@lemmy.ca to c/technology@lemmy.world
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[–] RaoulDook@lemmy.world 27 points 1 day ago (8 children)

Important note near the end of the article - they aren't saying we should cook batteries really -

"The team's hypothesis is that the structural disorder developing inside LIBs may become a “tunable parameter” that, if tweaked using chargers at precise voltages to alter said battery composition, could be used to rejuvenate the batteries in our tech without fires."

This is a good old idea that goes back to the days of desulfating lead batteries with powerful shocks of high-amperage current. Might just need a special Healing Charger that applies the right voltage/current to dissolve the bad crystals in lithium-ion systems

[–] CucumberFetish@lemm.ee 6 points 1 day ago (1 children)

I remember recovering dead 18650 cells from laptop batteries and "restoring" them with a 12V modded PC PSU. Quite a few of them actually started working again and had some capacity for a few tens of additional cycles. Those cells were never left unattended in a charger and they were always only used in a device you could chuck in a moment's notice.

10/10 do not recommend.

[–] RaoulDook@lemmy.world 1 points 1 day ago (1 children)

How did that process work? Did you just connect the +/- ends of the cell to the +/- 12v wires of the PSU and let it feed from the high-amp outputs? Imagine there's plenty of amps on the GPU and CPU power wires

[–] CucumberFetish@lemm.ee 2 points 22 hours ago

Yup, just plugged it in there. The internal resistance of these cells was high enough that it limited the current somewhere between 3-8A. And this was done only briefly as these cells got quite...warm.

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