Comment on Solar energy storage breakthrough could make European households self-sufficient
KinNectar@kbin.run 7 months ago
@ooli tl/Dr "Photoncycle
Brandtzaeg holds up a chalk-looking substance: “With this, you can store electricity 20 times as densely as in a lithium battery.”
“We're locking up the hydrogen molecules in a solid to basically fix them. We're using a reversible, high-temperature fuel cell, so we're assisting a fuel cell which both can produce hydrogen and electricity in the same cell,” he says.
That means no need to cool the hydrogen down, making it non-flammable and giving it a higher density than an ion-lithium battery"
JohnDClay@sh.itjust.works 7 months ago
I wonder what’s the volumetric energy density, historically that has been a bigger issue than gravimetric energy density.
KinNectar@kbin.run 7 months ago
@JohnDClay
Good question, this article is pretty fluffy, not a lot of hard data. Reads kind of like a fluffed up press release honestly.
helenslunch@feddit.nl 7 months ago
You don’t need to @ people here, homie
KinNectar@kbin.run 7 months ago
@helenslunch
Hmmm... it does it automatically for me when I reply. I'm on mbin/kbin
ColeSloth@discuss.tchncs.de 7 months ago
This was totally a fluff investment article for funding.
Pelicanen@sopuli.xyz 7 months ago
According to their site:
So about 3.33 MWh per cubic meter, 3.33 kWh per liter, or 3.33 Wh per cubic centimeter.
JohnDClay@sh.itjust.works 7 months ago
Hmm, if that’s correct, that’s even higher than liquid hydrogen, which would be really impressive.
Energy densities
Pelicanen@sopuli.xyz 7 months ago
Since it’s solid hydrogen I think it’s to be expected, however I didn’t see any information regarding energy losses which I imagine would be quite high when you have those kinds of cooling requirements.
Valmond@lemmy.mindoki.com 7 months ago
Thats in the ballpark of a year of usage from a household. Neat if true.
abhibeckert@lemmy.world 7 months ago
The article is light on details, but it claims they’re storing the hydrogen as a solid - not as a gas.
Solids (including hydrogen) are generally about a thousand times more compact than their gas form.
First@programming.dev 7 months ago
They don’t? When the Toyota hydrogen cars were introduced here around 2015, one of the issues were that a full tank of gas would dilute through the tank walls within a week. From the marketing material of the latest Toyota Mirage, it seems that they still use Hydrogen stored in gas form, boasting improvements in a 3-layer tank that is tested for 235% of the pressure that the gas is stored at, compared to 150% for regular gas containers.
philpo@feddit.de 7 months ago
They don’t. They use hydrogen fuel cells to generate electric power.
Hamartiogonic@sopuli.xyz 7 months ago
Hydrogen really really doesn’t want to be solid, so doing that requires extremely low temperatures. Incidentally, they specifically said that their applications didn’t use super low temperatures, which doesn’t really leave that many options.