this post was submitted on 03 May 2024
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Futurology

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[–] just_another_person@lemmy.world 20 points 10 months ago* (last edited 10 months ago) (1 children)

Isn't it just a capacitor at that point if it's rapid charge and discharge?

I've been seeing these hopes and dreams fly and fail since all the hubbub about graphene batteries. Will believe it when I see it in my devices.

[–] Revan343@lemmy.ca 3 points 10 months ago

A capacitor stores energy in a different way than an electrochemical cell does

[–] Anticorp@lemmy.world 13 points 10 months ago (1 children)

Charging time is a worthless metric without the capacity.

[–] grrgyle@slrpnk.net 9 points 10 months ago

Yeah, like my laptop battery chargers in zero seconds, because it lost the ability to hold its charge, checkmate

[–] hperrin@lemmy.world 12 points 10 months ago

Anyone can make a battery that charges in one minute. Tell me when it also has the same capacity as my phone’s battery and will last thousands of charge/discharge cycles.

[–] Wizard_Pope@lemmy.world 11 points 10 months ago (1 children)

Did I miss what the energy density is for those batteries??

[–] themeatbridge@lemmy.world 11 points 10 months ago (1 children)

No, they don't provide any specifics about the capabilities of individual layers, but I would guess that they can customize the energy density of a solid-state battery by adjusting the manufacturing process.

They do say that they are only currently the size of a pinhead, so they are still in the proof of concept phase.

[–] Wizard_Pope@lemmy.world 4 points 10 months ago (1 children)

I see. It would be nice to at least hear a hypothetical energy density so we can get a feeling as to how good these new batteries would be.

[–] themeatbridge@lemmy.world 2 points 10 months ago

I agree with you, but it sounds like the technique is an advantage because it works at higher and lower temps than standard batteries.

[–] gregorum@lemm.ee 6 points 10 months ago

I look forward to hearing about this again in 20 years, or never again