Why do you use two sheets of nonwoven fabric that go between electrodes at 8:28? Can I just use 1? Is there a reason behind this? Also the middle electrode I presume the middle electrode would not contain any insulating glue, but the outer electrodes do have insulating glue that covers exposed metal, right?
Between the electrodes I use 2 sheets of non-woven fabric for the reason that with a single sheet I had noticed that in case of pressure there was a short circuit between the activated carbon particles of the 2 electrodes. The central electrode does not contain protective glue for the metal. While in the 2 external electrodes the metal is protected from direct contact with the electrolyte
I suspect one might make a more active surface area by adding some the salt to the carbon slurry instead. When the water dries the salts crystalizes. The theory is that later when water is added, the crystals disolve and leave behind voids for ions to hide their charges in when the plates are charged.
@@claudiohomelab8181 science is testing hypothesis. Many hypothesis don't work, but we always learn something. And work or not, interested people will watch to learn.
I am a little curious why you didn't soak your layers of non-woven cloth in the electrolyte and then use your press to compress them down to a desired amount of saturation. I feel it would probably result in a more even spread of the liquid. Either way, this seems like a decent result from a home lab an a terrific way to turn a marginal supply of power into something useful.
I have to admit that soaking the non-woven fabric directly into the electrolyte is a better solution, in fact in the preparation of another supercapacitor I adopted this technique
You're getting half a volt for 44 minutes, at what ampage? Because for something that large of pouch cell, not very efficient. The standard should be closer to 6×6 in pouch could charge a phone halfway.. isn't it?
Can be purchased at a laboratory chemical store, sodium perchlorate is expensive: 250g about 100€, and being classified in some countries as a precursor to explosives, may be subject to restriction in sale
@@claudiohomelab8181 I see the alternative is sodium nitrate, is this as good as sodium perchlorate? It appears to be cheaper too. If used the video mentions to use 91 grams in 100mL of water, is this the correct amount for the ideal electrolyte or is there a different ratio to be used? Thanks for your response.
Sodium nitrate is the second best alternative after perchlorate and is less expensive and easier to find. The voltage that can be reached is slightly lower. The solubility of sodium nitrate is 91 grams in 100 ml at a temperature of 25 ºC
@claudiohomelab8181 And is that how much I use per 100mL of water? Or do I use what I calculated for 5mol/L to be 42.5 g per 100mL for sodium nitrate? And the water used can be distilled or deionized water? I do appreciate your responses to the many questions I have asked by though way, so thank you.
Glad that you know the best water based electrolyte for super capacitor is sodium perchlorate, but may aluminium perchlorate give higher capacity
Thank you for the clarification
شكرا ياسيدي لايوجد قطب سالب قطب الموجب؟؟ ❤
يمكن أن يكون القطب موجبا أو سالبا ، ويتم إنشاء القطبية من الشحنة الأولى ومن ثم ينصح بالحفاظ عليها.
Why do you use two sheets of nonwoven fabric that go between electrodes at 8:28? Can I just use 1? Is there a reason behind this? Also the middle electrode I presume the middle electrode would not contain any insulating glue, but the outer electrodes do have insulating glue that covers exposed metal, right?
Between the electrodes I use 2 sheets of non-woven fabric for the reason that with a single sheet I had noticed that in case of pressure there was a short
circuit between the activated carbon particles of the 2 electrodes.
The central electrode does not contain protective glue for the metal. While in the 2 external electrodes the metal is protected from direct contact with the electrolyte
I suspect one might make a more active surface area by adding some the salt to the carbon slurry instead. When the water dries the salts crystalizes.
The theory is that later when water is added, the crystals disolve and leave behind voids for ions to hide their charges in when the plates are charged.
It could be an idea to experiment with
@@claudiohomelab8181 science is testing hypothesis. Many hypothesis don't work, but we always learn something. And work or not, interested people will watch to learn.
I am a little curious why you didn't soak your layers of non-woven cloth in the electrolyte and then use your press to compress them down to a desired amount of saturation. I feel it would probably result in a more even spread of the liquid. Either way, this seems like a decent result from a home lab an a terrific way to turn a marginal supply of power into something useful.
I have to admit that soaking the non-woven fabric directly into the electrolyte is a better solution, in fact in the preparation of another
supercapacitor I adopted this technique
@@claudiohomelab8181 I look forward to more of your videos in the future!
@@bearnaff9387 OK
I follow your channel with pleasure. Could you please add subtitles?
Thank you for your appreciation. I know that for a few hours after publication the subtitles were not visible, but now they should be seen
You're getting half a volt for 44 minutes, at what ampage? Because for something that large of pouch cell, not very efficient. The standard should be closer to 6×6 in pouch could charge a phone halfway.. isn't it?
Great
Where do you buy sodium perchlorate? Is it supposed to be expensive?
Can be purchased at a laboratory chemical store, sodium perchlorate is expensive: 250g about 100€, and being classified in some countries
as a precursor to explosives, may be subject to restriction in sale
@@claudiohomelab8181 I see the alternative is sodium nitrate, is this as good as sodium perchlorate? It appears to be cheaper too. If used the video mentions to use 91 grams in 100mL of water, is this the correct amount for the ideal electrolyte or is there a different ratio to be used? Thanks for your response.
Sodium nitrate is the second best alternative after perchlorate and is less expensive and easier to find. The voltage that can be reached is slightly lower.
The solubility of sodium nitrate is 91 grams in 100 ml at a temperature of 25 ºC
@claudiohomelab8181 And is that how much I use per 100mL of water? Or do I use what I calculated for 5mol/L to be 42.5 g per 100mL for sodium nitrate? And the water used can be distilled or deionized water? I do appreciate your responses to the many questions I have asked by though way, so thank you.
@@Ryan-gf6bs To use sodium nitrate you need to dissolve 91g of NaNO3 in 100ml of water, the water can be either distilled or deionized
A soft bristle brush would have made saturating the cotton easier