this post was submitted on 03 May 2024
62 points (94.3% liked)

Futurology

3380 readers
5 users here now

founded 2 years ago
MODERATORS
top 10 comments
sorted by: hot top controversial new old
[–] just_another_person@lemmy.world 20 points 2 years ago* (last edited 2 years 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 2 years ago

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

[–] Anticorp@lemmy.world 13 points 2 years ago (1 children)

Charging time is a worthless metric without the capacity.

[–] grrgyle@slrpnk.net 9 points 2 years 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 2 years 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 2 years ago (1 children)

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

[–] themeatbridge@lemmy.world 11 points 2 years 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 2 years 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 2 years 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 2 years ago

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