Technology

60038 readers

2723 users here now

This is a most excellent place for technology news and articles.

Our Rules

Follow the lemmy.world rules.
Only tech related content.
Be excellent to each another!
Mod approved content bots can post up to 10 articles per day.
Threads asking for personal tech support may be deleted.
Politics threads may be removed.
No memes allowed as posts, OK to post as comments.
Only approved bots from the list below, to ask if your bot can be added please contact us.
Check for duplicates before posting, duplicates may be removed

Approved Bots

founded 2 years ago

MODERATORS

Electrified cement could turn houses and roads into nearly limitless batteries (www.science.org)

submitted 1 year ago by enu@lemm.ee to c/technology@lemmy.world

11 comments fedilink hide all child comments

you are viewing a single comment's thread
view the rest of the comments

[–] drdabbles@lemmy.world 44 points 1 year ago

But what if your home was the battery?

But what if your walls could talk.

The cement devices are a kind of simplified battery called supercapacitors.

Yeah, cement as a supercap is a terrible idea on every conceivable level. First off, cement CO2 emissions are astounding. Second, what happens when this porous material gets wet and a short to ground happens? Your cement pad suddenly vaporizes you if you turn on the sink.

If carbon black cement was used to make a 45-cubic-meter volume of concrete—roughly the amount used in the foundation of a standard home—it could store 10 kilowatt-hours of energy

So, 65 metric tons of cement to store the energy equivalent of less than 700 cylindrical cells, or two Tesla modules from an old Model S. This is purely idiotic. Oh, and it's never serviceable or upgradeable without tearing up and relaying all that concrete. A battery pack you could hide in your closet is capable of vastly outpowering this 45 cubic meter pipe dream.

It's too bad "science" doesn't filter out obvious junk, because it would be a much better site.