How To Make an Aluminum Air Battery
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- čas přidán 12. 07. 2024
- What’s up internet. Today I’m sharing a project of mine that I’ve had a lot of fun with over the years. I’ve been interested in aluminum air batteries ever since I heard about them from a friend in university years ago. Hope you all enjoy the video.
Want to learn more about aluminum air batteries? Check out my course - www.udemy.com/course/aluminum...
Curious about how this project is going? Check out this playlist for the latest video - • Aluminum Air Batteries
Wanna help keep me caffeinated - www.buymeacoffee.com/mechgone...
Materials List:
- Powdered graphite - amzn.to/3yomhxt
- Paint - amzn.to/3IJp34V
- Copper mesh - amzn.to/3IJ4BBl
- Parchment paper - amzn.to/3ETacmg
- Duct tape - amzn.to/3DL4XDK
- Deck of playing cards
- Aluminum foil
- Salt water
- Paper towel
Filming equipment:
- Samsung Galaxy S8 - amzn.to/3DL3mhe
- Tripod - amzn.to/3xNw4N6
Video editing software:
- Wondershare Filmora 10 - filmora.wondershare.com/invit...
Intro 0:00
Supplies used 0:51
Making the battery 1:52
Assembling the battery 4:50
Testing the battery 8:15
Outro 10:01
Purchases made through some of the links may provide some compensation to Mechanic Gone Rogue. As an Amazon Associate, I earn from qualifying purchases.
Disclaimer
This video is available and intended for educational and informational purposes exclusively. Due to factors beyond the control of Mechanic Gone Rogue there is no guarantee as to the accuracy, applicability, or fitness of the information, tools, and techniques portrayed in this video. Nor is there any guarantee against the improper use or unauthorized modifications of this video and the information in it. DO NOT TRY THIS AT HOME. Mechanic Gone Rogue will not be liable or responsible in any way for any injury, property damage, or loss of any kind that may result from the use of or reliance of the information in this video. You are using the information, tools, and techniques seen or implied in this video solely at your own risk. - Věda a technologie
Hi everyone. Thank you all for your views and your comments. I've got a number of comments on the volume of the music. I really appreciate everybody's feedback on this, and will be making changes in future videos. Check them out and let me know if I did any better. Cheers!
Edit: To everyone who is asking for the music to be removed. I would if I could. As it stands I would have to reupload the video to do that, which is not an option right now. I do have a second aluminum air battery video already up with no music, and it features a better battery. Why that one is not more popular than this one is beyond me. Regardless you may like that one better. Check it out. czcams.com/video/8wEmjwfHqRI/video.html
The music did detract from your interesting video.
It's nice to have some music, but I would reduce the volume signifigantly, and only play it for the introduction, and towards the end of each section. The audio recording quality and production quality was good. Good luck with your channel!
@@MechanicGoneRogue hey there cool video is there a way to make a gel or oil electrolyte for a longer lasting battery?
@@GDMHificationranpitc glad you liked it. I have read some papers talking about gel electrolytes, but I have not had any success of my own. It is something I'm looking into currently. If I find anything I'll be sure to make a video out of it. Cheers!
@@MechanicGoneRogue it kind of reminds me of a hemp battery I saw a guy make.. (Robert Murray Smith) hint hint. hmmm thermal paste... I don't know just brainstorming. I wouldn't say I liked the video it was aiggght... I think you could do better. Maybe by adding some eye candy babes to the video... the CZcams thirst is real #nolust.
U have content but please use lower music volume . Good luck
Thank you very much. I definitely will be lowering the music in future videos. I've got a lot of good feedback on it this time around. Cheers!!!
Mechanic Gone Rogue there’s a free ware call “levelator” or “levelater”.
It balance your high & low. (not related to your current issues of music competing with your important info or bad echo or placement of mic).
I agree, i can hardly hear him at low volume but he stops the music if you carry on watching
.
Edit: ... oh.... it comes back but its alright .. nice video.. i want to make this cus its so simple
I totally agree, I don't understand why DIY CZcamsrs think music is necessary for instructional videos over vocals. Music usually ruins the video because it's too loud or a terrible choice.
$5 eBay lapel mics, old Android phones and the ASR audio app are a fantastic solution for low budget sound.
@@MechanicGoneRogue the musics not that loud you should look into sidechain compression, it basically ducks the music down when your voice is present
Making use of the czcams.com/users/postUgkxcJ22tnHH9l1vjdIdEIG27iOG55P7LXI8 reconditioning plan, I just saved 2 auto batteries from being completely junked. The guides were very simple to follow. I wish I would have found this years ago! You may use the guide to recondition any battery type
Hey mate, excellent video but a bit improvement would be no music and a nice MIC. You can get little shotgun mics that plug right into your phone or gopro or whatever
I'm very glad you liked it. I've got a number of comments on the music. Thanks for letting me know what you think about it. It definitely helps for future videos. Cheers!!!
@@MechanicGoneRogue definitely, better microphone! It is bit hard to follow because of the sound.
@@MechanicGoneRogue the music wasn't bad or anything, just between the music and the no mic sometimes it was hard to hear ya.
better mic and turn down the volume on the background track
Wonderful video, but please, please hold the music. It's really distracting and it's sort of the opposite of intellectual.
Wow thanks MGR! Best video out there for making this battery! Its easy to follow and you did a really good job explaining it!!
I'm very happy you enjoyed it!!! Cheers :)
You did great!
"Don't try this at home!" - does it at home on the dining table :'D
I think more people should be doing this sort of stuff at home. Now how do we increase the amperage? Imagine being able to recharge your cell phone by pouring some salt water into a canteen.
@@Kelvari7882 I totally agree! Thats why i'm doing stuff at home that is not recommended! :)
excellent video. something to point out with this, if you were to charge this battery it will produce chlorine, hydrogen, and oxygen gas. you might want to replace the electrolyte with sodium/potassium bicarbonate, sodium/potassium carbonate, or sodium/potassium hydroxide to avoid producing chlorine.
@Nature Nerd No, they need to be recycled.
That is really cool. I'm impressed. Great for people who have no power or batteries.
Thanks alot. Yah I agree the concept has the potential for alot of applications. That's one of the reasons I enjoy playing around them. Cheers!
You are the most lovely honest and Sincere Man
Thank you so much :)
Loved it, keep up the good work!
Will do!!! thank you very much. I'm glad you liked it.
@@MechanicGoneRogue .
Thanks for the lesson. I just learned something today that I often wonder about. Now I got questions about it, like how long do they last per use. Life expectancy. Recharge time. Up scaling. Down scaling. Actual applications for them. Questions off the top of my head about them air batteries.
Thanks for sharing the video....
Glad you enjoyed my video. To answer your questions. They last about 1 day before the water evaporates. I havent tried recharging them, and scalability wouldn't really work with this design. Its more of a one time use proof of concept. As for real world use Ive read the U.S military has used these for years in remote observation stations (dont know how reliable that info is) and India is trying to make a version for electric vehicles. Hope that answers everything. Cheers!
@@MechanicGoneRogue thanks for sharing your info with me. I appreciate you getting back to me and I’m hoping you figure out how to make the battery last for a long, long time. The refinements are going to take some time to work out, but, the experimental stages will be fun for ya.
Thanks for sharing your video.
Cool, thanks for sharing. An inventor here in the UK developerd a more efficient version but the gov wouldn't fund it. I think he had problems getting rid of the powder that builds up, which is re-useable of course.
You know I think I heard of an ex military guy in the uk that did that. I didnt know about the he struggled with dealing with the powder build up. Glad you liked my video. Cheers!
Nicely done!
Why thank you!
Nice! I love your approach, cool to encourage amateur battery experimentation. I would try graphite spray lube for the carbon source as well. Thanks for sharing.
So glad you liked the video!!! I had tried graphite based spray lube before but it wouldn't conduct anything. The resistance is through the roof. I suspect the manufacturer added an inhibiter of some sort. Perhaps there's others out there without that, but I haven't found them yet.
Now what can we do to fix the Auto battery?
Thanks
yo u are the most modest youtuber ever good job
I'm really happy to hear that. Thanks so much for the comment. Cheers!
u are good keep going world need people like u good luck
Thanks a lot mate! That's encouraging to hear. Cheers!
I LOVE IT!!
THANK YOU!!!
You have to teach my Chemistry class!! Well done.
Maybe one day. Thanks, I'm glad you enjoyed my video.
Well done.
Why thank you. Glad you enjoyed the video.
I *am* going to try this at home, at school, maybe at work, certainly on a deserted island, and then I’ll make a bigger one.
Awesome to hear!! Happy building.
Thanks friend 👍
No complaints, this is brilliant. Would it be possible to charge a phone. USB is 5v. So maybe. That would be so cool. I can re-examine my fantasy about going back in time and bringing my iPad. Probably end the world sooner.
no. its short circuit current was 3 milli amps. Maybe this thing could deliver 2 milli amps at 5v. A phone battery capacity is 3000 milli amps at 3.7v. It would take 1500 hours to fully charge the phone but im pretty sure this diy battery would be empty after a few minutes XD
Cool video, 5V is actually pretty good
Thank you. So glad you enjoyed the video. Cheers!!!
Cell phones run on 5 volts, why not light up a cell phone screen for a few moments to really impress...
No they don't. 3.7 volts.@@johnhopson4784
Keep it up, thanks :)
I used those flashlights for motion sensitive under cabinet lighting (on my channel).
400mA lights them brightly, so it looks like, under load, that is lower, maybe 200mA?
Very Nice!
Thank you! Cheers!
awesome!!!
Thank you! Cheers!
Congrats on 5000 views for one video!!!!. Ps, I commented when it was at 4,929......but by the time this is seen it will probably be 5,000
Hahaha thanks!!! Yes I saw it well past 5k views.
now almost 60k
@@mattdathew2794 100,000 now! it's really popping of.
Great stuff! Would love to see some of the theoretical side explained as well. thank you.
Really glad you liked the video. Yes, hopefully that will be a future video topic. Thank you for the feedback. Cheers!!!
Bravo majstore.
You say not to try this at home...
But that's all I wanna do now!! 😂😂
Hahaha, annoying disclaimers getting in the way of all that fun 😏
@@MechanicGoneRogue 😂😂😂
Well done m8. Very little on the practical side of these things... Anywhere actually! 🙂
You hit the nail on the head. That is exactly why I made this video. I figured someone had to do it. Very glad you liked it!!!
Amazing
Thank you! Cheers!
Good vid - lose the music, its really annoying
Glad you liked it. Thanks for your feedback on the music.
@@MechanicGoneRogue Agree with above. Awesome video, but either knock down the music 15-20db or remove it completely. It's cancer for us with headphones.
incredible.. good video
Thank you! Cheers!
Great project. I seen you only have 40 subs so I made it 41, just to give you a helping hand!
Little word of advise, please turn the music down about 25%-50% so it's not louder than your voice. Besides that, great editing and great tutorial! ✌
Really appreciate that!!! And thanks for the advice on the music. Cheers
Buy a cheap mic for your phone/camera. Makes a world of difference for your videos.
You know I hadn't even considered a mic before. Good idea!!!
Hey that's pretty great! Probably someone already suggested using the box that the cards came in as a final stack holder. Also a dry erase board sketch of the assembly would be very helpful. Those of us willing to admit that we are jealous that we didn't think of producing this; salute your nice creative work here. Those little 3 volt motors would also work nicely.
Thank you @clavo. So glad you liked the video, and thank you for the suggestions too. Hopefully I can include them in future videos. Cheers!
good job!
Why thank you. I'm glad you liked it!!!
how long did the light stay on? 5 volts and 3mah correct?
"Don't try this at home."
But .. where should we try it then? Isn't trying it at home is the core idea of the DIY videos?
I know right. Pesky disclaimers for liability purposes are always getting in the way of good fun, but at least if someone does try it at home they can't say I told them to 😏.
Someone else's home so if things go bad it's ok you can just go home....lol
Fyi I think the proper disclaimer to cover your ass ( it's what I hear alot on other videos) " this video is for educational purposes only and by no means is encouraging you to try this yourself. "
Or some shit like that.. thanks you bring something to the video that seems fun not like science class
@@jeremysmith7888 Or like Crazy Russian Hacker said, "Safety is number one priority."
@@jeremysmith7888 Dang that wording is spot on. I'm totally using it. Glad you liked the video :)
Awsome buddy,make it little more refined and controled.
Glad you liked it! Will do. I'm actually working on version 3.0 now. It's looking a lot better so far.
Interesting... Basic batter using salt water. If you used vinegar maybe it would make more miliamps. This is like a battery that would be made in a chemistry or physics class for study purposes.
Normally you would never connect an amp meter directly across the power source. If you did this with a regular battery you could damage the meter. Current should always be checked through (in series) a resistance load. The way current of a battery is checked is to put a resistance load and measure the rate of voltage drop across the battery. Then the internal resistance of the battery can be calculated. By timing the rate of discharge over time the Amp hours can be worked out.
Good suggestion. I have tried it previously but I didn't have any luck with vinegar. Lately I have been playing around with the electrolyte composition. I want to move away from water based electrolytes so that the battery is not dependent on water constantly being added due to evaporation. I'm hoping to make a video on it in the future.
@@MechanicGoneRogue For a non aqueous based electrolyte, you can use urea and choline chloride to create a deep eutectic solvent. It's completely harmless, but smells a bit fishy. You'll push the potential per cell up to ~1V and it never dries out.
@Vino Veritas I like where your head is at. That is exactly where I am looking right now. Choline chloride is almost impossible to find up here in Canada so it's taking a while to get anywhere, but I am making progress.
@@MechanicGoneRogue please use potassium hydroxide if you have the time. Love your video.
@@eone2345 Thanks. I'm glad you liked it. I'll see what I can do. Cheers!!!
yes!!!!!!! you rock!
Thanks for the comment mate! You rock too!!!
That's pretty cool dude!
Thanks! Glad you liked it!
Great video 👍
Glad you enjoyed it! :)
Cool video. The battery should work better if you use 2 different types of alkaline metal. Like copper and aluminum. Or silver and copper in between each layer. Just a suggestion lol cheers
Glad you liked the video, and thanks for the suggestion too. Maybe I can try that in the future. :)
So you're telling me that I can't find aluminum air batteries in a car?! You learn a new thing every day. In all seriousness, super impressed with your editing skills.
Well they aren't in cars yet 😏 maybe one day I'll make one that's good enough for a car. Thanks a lot 😁
Yess!! And those time stamps 👏👏👏🔥
Gotta keep the videos looking as professional as possible 👌
@@MechanicGoneRogue yess 🙏 it's so good! 😊😊
Gee Thanks !!! 😊😊😊
Wooo! learning how to make batteries at an average rock concert ✊✊
Haha it's the best place to learn!
If you would use just K2CO3 with water as the electrolyte you can almost get 3x the voltage out of this battery !! Just try it out !
Regards, Stefan.
But then he would be creating a alkaline 🔋 😅
that is much better thanks
hello man, congratulations, really a battery of respect and truly functional, thanks for sharing, I just wanted to know what kind of paint you mixed with the graffiti, thanks in advance, hugs.
Hi there @Carlos Alberto Silva. Thanks so much for the comment. I'm thrilled that you enjoyed my video. The paint I used was just some cheap acrylic paint I got at a local dollar story. I picked a metallic one because I thought maybe the metal flakes in the paint would help the battery output. In retrospect though I don't think it made a difference. Hope that helps. Cheers!
GOOD JOB
Thank you very much. I'm glad you enjoyed my video.
Great Video, How long does the battery lasts?
Thanks. Glad you liked it. I've had some prototypes last a couple weeks if I keep applying saltwater daily.
Cool
To generate more current, you could increase the size of the cells and make sure your graphite is sufficient and that you are adding enough electrolyte and spreading it evenly WITHOUT OVER SATURATING YOUR BATTERY!!! If you add too much it will likely short out. I suspect that the battery in this exercise had one shorted cell as 10 x .6v would be a bit more than 5.0x volts and the current went to over 11mAh and then dropped rapidly.
There are some slightly more elaborate home made batteries that produce more voltage and current that you can make and 'store' for use when needed....search them :)
Hey mate great project.
Subscribed!!!
Well can we charge the battery by providing a suitable voltage across the ends?
Is this rechargeable battery?
It‘s a battery, not an accumulator. If you try to charge this thing, it‘ll probably blow up or burst into flames. I wouldn‘t recommend it. For more volts, you would probably need larger „cards“, or more of the same cards in series (a higher stack of cards) for more milliamps (more „light“), you would probably need 2 or 3 of these Batteries in parallel...
Thank you. I'm glad you liked it!!! Unfortunately this type of battery doesnt recharge. Personally I haven't tried it, but as Philip has mentioned there could be some adverse side effects. I'm working on a different version were it may be possible to recharge it. So stay tuned. Cheers!!!
If you want to build a far more powerful one stack the following. Aluminum cathode, paper towel, wood ash or baking soda paste electrolyte, steel wool with some graphite soda paste, steel anode. Each cell makes about 1.8V and current of about 30mA per square centimeter of cathode. It works a lot better if you mix some rust with the electrolyte paste. Good apocalypse project. ❤
That's sounds pretty powerful. Thanks for the suggestion. Do you know if its rechargeable?
Super!
Thank you! Cheers!
very good, i like very
Thanks :) Glad you enjoyed it!
شكرا على الجهد .
Thank you :)
very nicely made, have you also recharged these babies? it should be possible. i like how you made them
Well I'm really happy you enjoyed it. I haven't tried recharging them yet. Hoping to do that in the future sometime. Cheers!
Hello, I loved your video, and it is a very efficient project to work on, but if you could, would you please send a labeled diagram of the battery?
Nice can they be recharged Can you do a bigger on in volt and sice
GRACIAS
Your Welcome :)
Would it work if u used simple pencil to colour the paper instead of carbon paint?
I tried using pencil lead previously but got fairly poor results. I suspect it's because of the binder used to hold the graphite together. I'm not sure if that's for all pencils or just the brand I was using, but I haven't tried pencil lead since then.
Just wondering what would happen if u use fine copper mesh and fine carbon mesh with zinc mesh.
Closely together with 1mm gap 10 layers each no electrolyte, would it generate electricity?
Good question! I have no idea. Can't say I've tried that before.
what can i say awsommmme!
Yaaaah. Thanks mate. So glad you enjoyed the video!!!
Lower music (obviously) and a remote tie clip mic. That way you will make your videos much easier to watch and listen too.
Noted! Thanks for the tips :)
Excellent for learning how or works but I think it takes longer to build this than the battery will last.
How long until your battery discharged? Can it be recharged? How much total electricity can be taken from the battery?
Obviously, I'm interested. Any thoughts on the possibility for commercially available aluminum air batteries?
Thanks!
Good questions. The battery is a primary cell so it cannot be recharged, and it dries out long before it's finished discharging. (usually about 1 day). I haven't measured the total available power output of it yet. Maybe in the future it would be commercially viable, but definitely not right now. Cheers!
nice vid.
Subbed:)
Thank you very much. I'm glad you enjoyed my work!
Think that Video is going to blow up
It would be awesome if it did :)
Great video. How long does the charge last with continuous use?
Well the battery lasts for the 1 day before it dries out. Beyond that I'm not sure. Glad you enjoyed my video. Cheers!
@@MechanicGoneRogue can the battery be rehydrated?
@@julioacosta-silverio2010 yup although sometimes it gets a little messy. I use a syringe to get the saltwater into each layer with out taking everything apart.
what sort of battery life are you getting? like how long will the flashlight run on this battery?
Hey there @Mike Klegin. I haven't done an endurance test of the battery yet, although if all goes well I have plans to do some testing in the future. I know that the battery will light the flashlight for about 1 day before the electrolyte dries up. If I keep on adding electrolyte I had one model a while back last for a couple weeks. Hope that answers your question. Cheers!
Yes Bro...
God Bless.....
Thanks. I'm glad you liked my video :)
How long will it last under load?
It would be nice to see you charge a phone for a few moments with it. When the screen lights up people would be more impressed than a light but great job you're a bright fellow...
Good idea! I should give that a shot. Glad you enjoyed the video mate. Cheers!
5v @ ± 2.5 mA, I wonder if it would charge a cell phone in a pinch, and if so... how long it would take and how many times. COOL project!
Glad you like it. A number of people of mentioned charging a cell phone. That never really crossed my mind, but I might have to try it out.
Part of the issue with current delivery is the fact that aluminium oxide is in effect sapphire. This means your aluminium has an aerospace semiconductor grade insulator on it vastly reducing effective surface area. I have not got a clue how to get round that though without using some highly toxic chemicals, some of which I personally would not want to be in the same town as EG Chlorine Triflouride which wants to poison you, dissolve you, and set you on fire all at the same time.
Superbe 👍
Glad you liked it. Cheers!
when you measure current ampere, it means that you do short circuit.. the current will drop shortly.. that's why led light are not bright..
sir,what is the chemical reaction you used..?after adding salt
That's it just salt & water.
it's advertised as an aluminum air battery.
I learned a lot. I learned that these things are stupid easy to make, stupid easy to mass produce, have almost no carbon footprint, and there is no reason we all aren't driving electric vehicles powered by these. I learned how corrupt the fossil fuel industry is as well since they are the only people possible that could stop this from being expanded on into the auto industry.
I have read many articles about "new technology" that would revolutionize the auto industry and move us away from fossil fuels where the patents on these technologies were bought by fossil fuel people and then never used. I wasn't so sure that was true until now.
Would like to take a shot at it, is there any safety precautions you can share?
Honestly from my experience I found that just using common sense got me a long ways. I mainly added the disclaimer for liability reasons. Happy building mate!
I'd like to see how long it would last connected with that load. Good job though :)
Glad you liked it. I've actually got a lot of people asking about that so hopefully I can cover that in a future video. Cheers!
Very nice demo.
Does the battery consume all of the metallic AL? If not you may want to mix some household bleach into the electrolytes, its pretty darn good at accelerating oxidation in AL but getting the ratio right so you don't burn up the battery too fast might be a trick.
Also. I could only just hear you over the music at times, demos like this need to be mixed voice forward
I'm glad you like it. No there is usually some extra aluminum sticking around. It may just be because the water evaporates before it can be consumed. Good idea on the bleach. I'll have to give it a shot in future experiments. Also thanks for mentioning the music. Definitely going to be turning it down next time. Cheers!!!
@@MechanicGoneRogue This (slow reaction) is also the reason why your short circuit current is too low. Aluminium oxide film acts as an insulator greatly increasing the battery's internal resistance. Bleach or Sodium Hydroxide added to the electrolyte would dissolve the oxide film and will do wonders for the battery's power delivery. Oh, and lose that music.
I'm curious about the electrolyte. Why do you dissolve the salt until you can't dissolve any more instead of just using a normal amount of salt? Does this help with the current or something?
Good question. To be honest when I made the video I thought that increasing the salt content would increase the conductivity of the water, thus allowing for more current. However if I let the saltwater sit at room temperature for an extended period of time the extra salt precipitated out of the solution, so I'm not sure if it makes much of a difference.
What is the base copper foil thickness and characteristics, are only ED copper foils used, can RA copper foils be also used, just curious whether RA copper foils are also used in making the anode current collectors : Thanks
I didn't use any copper foils for the anode. Just simple off the shelf aluminum foil. My guess is that copper foil would work because it also would oxidize however I've never tried it so I do not know for certain.
@@MechanicGoneRogue I think he was referring to the thickness of the Copper mesh not the aluminum foil.
"...and of course this would not be a proper project without duct tape..."
😂 😂 😂 👍
The hallmark of all good projects lol.
Yea but air will potentially "deplete" your battery because it will dry the electrolyte. Still, nice made and btw have you measured the overall cap?
Good tutorial spoilt by loud music. Couldn't hear what you were saying.
Thank you. I'm glad you liked the video. I appreciate your feedback on the music. I'll definitely change it for next time. Cheers!
Israeli company Phinergy and some Indian car manufacturers are getting together to produce batteries for vehicles. They use a filter system using silver apparently that removes co2from the air intake and improves performance with more oxygen. The electrolyte eventually will eat away all the cathode, and the batteries are not rechargeable, but recycling the aluminium hydroxide produced into aluminium is much easier than the lithium counterpart. The shelf life with the electrolyte in it s a problem, so it gets activated with water being pumped into the cells at the start of useage. Very high power to weight ratio. Something in the order of 50kg could give something like 500km or in that ballpark, by my reckoning. It is great for use for long distance travel, whilst a small range rechargeable pack would be great for daily commutes.
Pretty impressive!
Thanks!
In place of copper mesh can i use copper wire...?? Plz answer fast
you deserve a subscription.....
Thanks alot mate!!! I appreciate your support.
Are they rechargeable?
Let's get this video to 50 thousand views! YAAA!
I like your enthusiasm. By all means, be my guest.
Pppffft almost 90 thousand views pooooog
@@MechanicGoneRogue 100,000 YESSS
Yah it's really getting some traction!!!
How long it last? How is whit charging it? What is the cost of making them when compared with buying comercial ? Would be good to make them big for 12 volt sistem off grid place?
@Panter Divlji thanks for the questions. The battery lasts for about a day, and I haven't tried recharging it. I cant remember the cost of all the items, it was somewhere around 50$ CAD. This is only a proof of concept version. So definitely better to go with commercialized versions of this if you want some serious power. Cheers!
@@MechanicGoneRogue thank you for response
What was the load current at 5V?
It looked like it it had a peek current of about 10 milliamps when he initially connected the amp meter, and rapidly dropped to about 3 and a half milliamps where it remained.
Its not 100% correct to get the short circuit current. But I like that he gave us this reading. Obviously the internal resistance will limit this. We won't know capacity. But 50mW isn't great, but it is home made. I'd like to see how long it runs on a light load and what the current and voltage are over time. Guess we'll have to build it ourselves.
What did you use to make your carbon paste?
Just some off the shelf acrylic paint and dry graphite lubricant.