Potassium Hydroxide in Aluminium Air Batteries
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- เผยแพร่เมื่อ 3 มิ.ย. 2024
- Hi there. Today I'm looking at potassium hydroxide (KOH) and its effect on aluminum air batteries. I'll also be exploring a different method of controlling anode corrosion as well as the hydrogen produced by the KOH. Hope you all enjoy!
Want to learn more about aluminum air batteries? Check out my course - www.udemy.com/course/aluminum...
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See my previous videos experimenting with aluminum air batteries here - • Aluminum Air Batteries
Featured Materials and Tools:
- Ethylene Glycol
- Potassium Hydroxide
- Automotive Coolant (ethylene glycol based) - amzn.to/3haSgwg
- 1mm thick Graphite sheet - amzn.to/3701ZRv
- Aluminum Foil - amzn.to/3jgJoTM
Filming equipment:
- Samsung Galaxy S20 FE - amzn.to/3EuWR36
- Tripod - amzn.to/3xNw4N6
Video editing software:
- Wondershare Filmora 11 - filmora.wondershare.com/invit...
Intro - 0:00
The Problem - 1:05
Hydrogen Begon - 2:16
Testing the Solutions - 5:33
Full Size Test - 7:17
Outro - 10:27
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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. - วิทยาศาสตร์และเทคโนโลยี
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Can you try glycerol water des(without choline chloride), I think using it may increase the solubility. Also maintaining ph at most 9 can potentially prevent corrosion of the anode.
I was a Chemical Inspector/Surveyer in Houston for years, and had free access to these (And way way more) chemicals everyday in unlimited quantities. Now I'm switching career fields and taking a Hybrid Electric Technician course and I'm interested in making my own Aluminum Ion Battery much as you are. I'm thinking dang, now I got to find those chemicals and I bet they arnt as easy as just going to Walmart lol.
Now that's what you call ironic. Honestly the hardest chemical for me to find so far has been choline chloride. Thats why I make my own. Most of the other chemicals I got from Amazon. Best of luck with your battery making.
Good video 👍
Thank you 😊
Is it rechargeable?
Hello, fellow diy battery tinkerer here. I love your work and applaud your experimentation and thank you for sharing it with us!
When you contact aluminum and graphite in a flooded configuration like you had, you don't have an aluminum-air cell, instead, you have a galvanic cell, i.e. you will be producing hydrogen gas on the cathode (graphite) as it discharges, this might be what you observed?
Hey there. Thanks for your comment. I'm glad you enjoyed my video. I agree with you about hydrogen production causing the bubbling, but aren't galvanic cells comprised of two metals?
@@MechanicGoneRogue well graphite is a metal of sorts 😋
Oh OK. Well I guess I never really looked at it that way. Thanks for sharing :)
dude, the energy from the aluminum dissolving when not going gaseous means it bonded in the liquid and made it more potent...
To make the prescence of Hydrogen completely 0, I think adding KOH directly to the Deep Eutectic Solvent is a good idea. This will surely suppress Hydrogen evolution. Also, we can soak graphite in a solution of platinum or manganese dioxide nanoparticles, to increase ampearage.
Thanks for your comment @ Aadhith Varathan. Interesting suggestion using manganese dioxide on the graphite to bump the amperage. I've never worked with it before. Do you know of any sources that talk about that process? I'd be interested in reading into it further.
@@MechanicGoneRogue You can look at Robert Murray Smith's videos. He will explain how for Oxygen Evolution Reactions, Platinum is the best but is too expensive but MnO2 nanoparticles is the next best bet. He would also explain how to coat carbon felt with such catalysing particles.
He also clearly says, that just MnO2 is not enough. It has to be nanoparticles. To make them, we need to create a 0.01M solution of Potassium Permanganate, immerse carbon felt into the solution and keep this setup at 70 degrees celcius for 4 hours. The colour of the solution changes, indicating that the process works.
@@aadhithvarathan5432 oooh OK I'll check it out. I'm familiar with Robert Murray Smith's channel. I probably just missed that particular video. He has alot of them lol. Thanks again.
@@MechanicGoneRogue You're welcome.
Perhaps you are, but I'd keep to the battery's name sake by using pure aluminum. As store bought aluminum foil, much like soda cans are garbage loaded down with aloying metals such as zinc and so on. Any how thanks for reading good luck
Maybe so. There is actually a lot of research into aluminum alloys for the purpose of reducing corrosion on the anode. So aluminum foil may be better than we realize. Thanks for the comment. Cheers !
👍
🙂
oops! missed this video for a week. I note that you may need to normalize your audio levels a bit and maybe raise the gain on the facecam clips. The volume abruptly changed between some segments, and overall its much quieter than most other videos on youtube.
As for why the cloudiness appeared: note that hydroxides are hydrogen acceptors, while water is half-donor-half-acceptor. You probably didn't have enough glycol to donate hydrogen bonds for all the extra acceptors you added when you mixed the two solutions.
Regarding the bubbling: if it has water, it will bubble when charged above 1.23 V as the water is electrolysed.
Regarding current flow: more viscous solutions have a lower current as the ions find it harder to push through the solution, though current can also be affected by how many mobile ions there are per unit volume of electrolyte
Love the comment @pixelrainbow. Do you think the audio detracts from the video too much? I tried using some different audio features in my editing software, but it didn't seem to work out this round. For the cloudiness based of what your saying. Maybe if I upped the percentage of glycol that would fix it? And then for the current flow what if I included something that would give it extra ions? I didn't include it in the video but I noted in my experiments a small amount of sodium acetate seemed to improve current flow, but it wasn't by much so I didn't pursue it further at the time.
@@MechanicGoneRogue extra glycol might help, but I'm not sure, since hydroxides are almost never used as a component in DES, and water also tends to interfere with DES stability.
@@PixlRainbow well maybe in can mix the hydroxide in alcohol. I've found it is soluble in smaller quantities with ethanol.
try KOH + UREA = Don't know the exact ratio, i just used Urea then added some KOH and stirr it using rod .. Liquid Formed , Extracted it .. AND did the same thing again and again .. Huge Amp .. Do reserach on this as well.
Very curious. You commented on one of my other videos right? I was thinking about what you said since then. Do you mix anything else in or is it just KOH and urea forming the liquid? I'm wondering if your making a deep eutectic solvent. Which is pretty cool. Also do you know what the liquids ph is? And does the aluminum bubble alot when the liquid is touching it? I have both these chemicals so I'm probably going to try it. Just wondering what your experience has been so far. Thanks for the comment 😊
@@MechanicGoneRogue : Nothing , Just Pure Urea granules , and pure KOH flakes. if you need i can make video as well.
1. Put some urea in a beaker (5 grams), add few flakes of KOH in the beaker, mix it leave it for few seconds (10 to 20 seconds) , smash flakes on urea, it will turn into liquid,
2. Extract it just by tilting beaker .because of liquid, urea granule stick to beaker's wall and rest of liquid will go downside , simply extract it :D .. This liquid have super electric charges but dont know what exactly it is :( ..
one most important thing to consider, KOH flakes will be higher than UREA. If you use Stirring machine.. Less Urea + More KOH .. If you use same amount like 5g of Urea + 5Gram of KOH , it will turn into liquid but Urea will be there.. To dissolve urea you need to add KOH ..
We can play with the ratios and check their performance in battery environment.
I wanted to test in some battery environment , if possible for you please make a video on it ..
1. Graphite anode cathode with additives + given electrolyte . (UREA KOH) different ratio performance.
2. Graphite foil treated with KMNO4 ( Few hours at 60 to 80c .
OK thanks for all the info and the suggestion. This seems to have some merit. I'll be sure to give it a try when I can. Cheers!
@@MechanicGoneRogue i again created this solution. Make sure to use hand gloves , its highly alkaline in nature. One of the biggest advantage is higher concentration of koh. Here 20 c temp. Transparent liquid is very hard to make but translucent is easy. Its gel like structure now. Note : just focus on flakes or granuelle in mixture. Avoid powder. Granuelle means solution have more urea. Flakes means solution have more Koh . If Koh flakes in solution , add urea. And if urea granuelle is there then add urea (small quantity) , you can heat uoto 60 c. I tested on this for short period a
. Rest on test.. please tag me as we if you work on this.
Add Zinc oxide to the KOH.
Any particular reason why? Is it supposed to boost the reaction?
@@MechanicGoneRogue it would inhibit AL corrosion by electroplating Zn. Koh + Zn oxide + water or gel based on PVA +Borat . Use some carbon felt to increase surface area + active carbon powder + graphite. Graphite foil as current collector and AL would give a great battery.
You could create a ceramic from toothpaste + Koh + Zn oxide+ water.
Put it on paper separator and on the other side I would have an acid based gel. Use active carbon felt at the positive and graphite foil as positive current collector and on the alkaline side AL current collector.
Let me know what you think.
Oh, you want to do at least 20 charging cycles.
@@joaocarimo seems like you've done some research into this subject. Can't say that I've explored most of the chemicals you've mentioned, but I have been working on making a basic gel electrolyte with PVA. The results haven't been that good so I've been considering to mix up my approach and try plaster of paris instead. I definitely like your suggestions though and I'll probably try them in the future.
@@MechanicGoneRogue give it a try, because it is simple and very cheap. The results are amazing
@@MechanicGoneRogue I couldn't find quality grapheme. Otherwise I would have made current collectors from styrofoam+acetone+Graphene+active carbon+ graphite. I would press it in a press and let it dry to use it as current collector.