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Clive Thompson

A battery filled with algae is somehow managing to power this computer for months: newscientist.com/article/23195

No-one's quite sure what's going on. Possibly the algae is serving as the medium catalyzing the interaction between the anode and cathode in the battery.

Except research shows the anode isn't degrading, which suggests ...

... the *algae* is producing the electrons.

Some thoughts on this in my blog post here, item 6: clivethompson.medium.com/lavaf

Photo of a set of devices sitting on a windowsill. One is a small microprocessor that has a green main board. It has a yellow cord going up to a small black rectangular box about the size of a pack of gum, which has a clear circular window in it, though which one can see that inside is some algae. It has a black cord going out of it back to the computer board. The algae box is sitting on top of an inverted clear-plastic cup
51 comments
Clive Thompson

@kissane

So great, eh?

Like I was saying in the blog post, the fascinating thing isn't just that we're increasingly discovering how much electrical current plants produce, but that we've made computers that are so low-powered than they can be conceivably powered by plants ...

Meeting in the middle

Erin Kissane

@clive Yes, exactly that. Thatโ€”what, collaboration?โ€”that you noted in the post, that feels like such a fascinating vein of possibilities.

John Shirley

@clive NewScientist can be pretty woo-woo but I haven't checked to see whether there's been peer review...it sounds possible because electricity is found in many organisms...

Clive Thompson

@mattgriffin

omg yes

I haven't thought of that film in years!!

I saw in the theaters when it came out in the 80s, I'm old

DELETED

@clive

Do algae dream of electric tweets?

Stephen Cerruti

@clive I'm sorry, you realize this is a key component for either The Matrix or Soylent Green, right? This won't end well. Mark my words!

Clive Thompson

@scerruti

yeah there's definitely an unsettling factor here!

David Epithet

@clive I have to wonder now whether this would work with green algae, etc.

RL Mann

@clive for real โ€œbio-batteriesโ€ were a hot topic when I was in grad school 10yago. Itโ€™s pretty awesome to see how elegant โ€œin silicoโ€ advances are reducing power reqโ€™s.

peteryeates

@clive can we call this the Fleischmannโ€“Pond-effect (too soon?)

Clive Thompson

@tasket

Absolutely -- electrons transfer during photosynthesis

EmPenTen

@clive
Crazy, and beautiful! I love this :) Makes me wish I was better at making stuff like this myself, I'd love to see it working.

TheBicycleConspiracy

@clive
This interests me. I can order algae online and the anode was aluminum. What was the cathode material? I didn't see it in the article.

Stephen

@clive Before I got too excited Iโ€™d want to see a mass spec of the solution and the before/after weights of the electrodes to be sure itโ€™s not just a normal redox reaction, and the aluminium is slowly being consumed.

Iโ€™d wager considerable money that itโ€™s something like that going on.

Stephen

@clive See my later post - itโ€™s *tiny* amounts of power, but itโ€™s not redox, since thereโ€™s only one electrode.

Stephen

@clive For those interested, the abstract is at pubs.rsc.org/en/content/articl and the full paper is at rsc.org/suppdata/d2/ee/d2ee002

Itโ€™s a lot more complicated (and frankly, more plausible) than the New Scientist article makes out.

The algae are growing both on the aluminium wool, and in the liquid.

The peak power involved is 4.2x10^-6W, and itโ€™s only powering the CPU, nothing else. Youโ€™d literally need 10 million of these to make a normal LED light bulb turn on.

@clive For those interested, the abstract is at pubs.rsc.org/en/content/articl and the full paper is at rsc.org/suppdata/d2/ee/d2ee002

Itโ€™s a lot more complicated (and frankly, more plausible) than the New Scientist article makes out.

Danny Goossen

@clive with today low power micro controllers, this needs to be pushed harder.

DocBolus

@clive thanks for the blog, although I just rabbit holed with the Dall-E2
Not necessarily a bad thing.

Andrรฉ

@clive Next up:
artificial intelligence discovers humans could be used as cheap batteries ๐Ÿคช

malloc

@clive
This is basic biology. Photosynthesis by chlorophyll results in a photon of light producing a hydrogen ion and an electron in a process referred to as charge separation. It is these free electrons that are causing an electric current when algae are exposed to sunlight.

pat

@clive

From the article: "computational workload, which required 0.3 microwatts of power, and 15 minutes of standby, which required 0.24 microwatts."
That's the amount of power you can get from a literal hamster wheel after the hamster is dead and it only moves when the wind blows or even the cheapest fotovoltaic cell placed in shade. I mean, c'mon.

Ed Rybicki

@clive Well, you know, like photosynthesis...?

\หˆthฤ“-หˆหˆรคrd-หŒvรคrk\

@clive Incredible. And a technology so young can only have greater potential as it matures.

ElGonzales :linuxmint:

@clive Now lets try with an algea big as the Eiffel Tower for a standard Raspberry doing a ping to 8.8.8.8

TongLen

@clive

this is AMAZING with enormous implications especially in disaster, emergency, and war-impacted settings and for persons with needs to use and store healthcare items during power outages (example ventilators and insulin stored in refrigerators). #Healthcare #Disability #PublicHealth

Charles U. Farley

The first thing one should think upon seeing something like this is that it's either a mistake or outright fraud, until it's independently reproduced.

Britt Elizondo

@clive I live on a floating Algea lake. This could be a wonderful source of energyโ€ฆ maybeโ€ฆ very exciting!

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