The Biodegradable Battery(empa.ch)
empa.ch
The Biodegradable Battery
https://www.empa.ch/web/s604/papierbatterie
6 comments
Before clicking on the article, I thought it would be a fruit or vegetable with some electrodes stuck in it.
Any info on the theoretical capacity of these vs Lithium Ion? I didn't see it in the article. (Obviously it's not a competition, but it'd be nice to have some frame of reference)
According to the paper[1], the prototype has an energy storage capacity of 0.88 Wh/kg, which is about 250 times lower than standard lithium ion cells.
[1]: https://onlinelibrary.wiley.com/doi/10.1002/adma.202101328
[1]: https://onlinelibrary.wiley.com/doi/10.1002/adma.202101328
The "battery" is actually a capacitor; those tend to have very low energy density compared to batteries, but on the other hand can be charged and discharged very quickly.
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sucrose can be a great battery.
It's biodegradable, relatively cheap, dissolves in water (unlike oils) and has a high energy density.
1kg of sucrose has an energy density that is equivalent to 4kW. A typical daily power consumption of a family home is ~ 11kW It means that we can power an entire house with ~ 3kg of table sugar.
It's biodegradable, relatively cheap, dissolves in water (unlike oils) and has a high energy density.
1kg of sucrose has an energy density that is equivalent to 4kW. A typical daily power consumption of a family home is ~ 11kW It means that we can power an entire house with ~ 3kg of table sugar.
Until it starts raining. The cost of keeping the water out of the battery will be very high.
How is different than any other type of fuel cell / battery?
I have spent five minutes hunting the Interweb for information on the biodegradability of cellulose nano fibres. (I think that is called "doing my research", whatever)
I find a lot of people assuming they are biodegradable, which seems reasonable. But no reports of anybody testing the proposition.
Nanofibres have unique chemical properties and it may turn out that microorganisms cannot process them. I am not a chemist, let alone a bio-chemist...
Does anybody in Hacker News Hivemind know of actual experiments composting nano cellulose?
Assumptions or reasoning do not count
I find a lot of people assuming they are biodegradable, which seems reasonable. But no reports of anybody testing the proposition.
Nanofibres have unique chemical properties and it may turn out that microorganisms cannot process them. I am not a chemist, let alone a bio-chemist...
Does anybody in Hacker News Hivemind know of actual experiments composting nano cellulose?
Assumptions or reasoning do not count
The article says they tested it. It composted in two months.
Leaving some residue. What's in that?
Just some carbon, yesterday it was on TV:
https://www.swissinfo.ch/ger/empa-forscher-entwickelten-eine...
Sorry for just being in german.
https://www.swissinfo.ch/ger/empa-forscher-entwickelten-eine...
Sorry for just being in german.
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I am a biodegradable battery.
No you're not
You are biodegradable...
You are biodegradable...
I eat food to charge and can store that energy as fat.
Every human is a biodegradable battery of kinetic energy. So for what its worth, parent comment is technically correct.
We've got plenty of chemical energy stored in fat and sugar too :)
Battery+engine combo
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