Comment on Applying 'extreme heat' to lithium-ion batteries reportedly restores their capacity, and I think it's the sustainable tech breakthrough of 2025

Rolive@discuss.tchncs.de ⁨13⁩ ⁨hours⁩ ago

• dubyakay@lemmy.ca ⁨5⁩ ⁨hours⁩ ago

  80 degrees what?

  See, this is where the problems begin.

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  • brendansimms@lemmy.world ⁨4⁩ ⁨hours⁩ ago

    heat to 80K…oh wait

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• Lost_My_Mind@lemmy.world ⁨10⁩ ⁨hours⁩ ago

  So you’re saying I SHOULDN’T preheat my toaster oven to 425F???

  UH-OH!!!

  brb. Gotta put out some fires.

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• SirActionSack@aussie.zone ⁨13⁩ ⁨hours⁩ ago

  How is the boiling point of water relevant to something that’s made of plastic and metal?

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  • Rolive@discuss.tchncs.de ⁨12⁩ ⁨hours⁩ ago

    Well the electrolyte solution is water based so exceeding the boiling point will cause pressure buildup inside.

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    • isolatedscotch@discuss.tchncs.de ⁨8⁩ ⁨hours⁩ ago

      wha wha what

      no, it’s an organic solvent like ethylene carbonate/propylene carbonate + some other stuff, which have a boiling point of 230+°C ( 446°F)

      heating up batteries is (mostly) fine (under controlled scenarios with known good batteries, spicy pillows can always happen with bad batches) as long as the plastic holding them together doesn’t melt

      you physically CANNOT make a lithium ion battery with water because lithium reacts with water

      from the wikipedia page

      Lithium reacts vigorously with water to form lithium hydroxide (LiOH) and hydrogen gas. Thus, a non-aqueous electrolyte is typically used, and a sealed container rigidly excludes moisture from the battery pack. The non-aqueous electrolyte is typically a mixture of organic carbonates such as ethylene carbonate and propylene carbonate containing complexes of lithium ions.[45] Ethylene carbonate is essential for making solid electrolyte interphase on the carbon anode,[46] but since it is solid at room temperature, a liquid solvent (such as propylene carbonate or diethyl carbonate) is added.

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    • Skydancer@pawb.social ⁨12⁩ ⁨hours⁩ ago

      That still doesn’t follow. For every mole of particles dissolved in a liter of water, the boiling point of water increases by about 0.5°C.

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      • Rolive@discuss.tchncs.de ⁨11⁩ ⁨hours⁩ ago

        Good point. It’s highly concentrated inside a battery if not saturated. Hmm. I still wouldn’t expose them to such high temperatures.

        Perhaps a longer duration at lower temperature is safer. I might try it some day with some waste batteries and a battery tester.

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