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Author Topic: selfmade homemade DIY supercap ultracap bcap boostcap  (Read 23115 times)

Offline hartiberlin

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selfmade homemade DIY supercap ultracap bcap boostcap
« on: November 26, 2009, 05:51:54 AM »
Well,
you can build yourself pretty cheaply supercaps yourself.

Just use aluminium foil as one layer and put a little wet only papertowel with saltwater
over it and then use graphite powder on the wet paper towel and then pack as the top layer
a plastic wrap sheet plastic foil (the type from the supermarket).
Then roll these stacked layers up and use a graphite pencil mine from a pencil to make contact to
the graphite powder layer.
The other electrode is the alufoil.

Use a power supply not more than 2.5 Volts to charge up this selfmade supercap.
The graphite pencil electrode is the positive pole
and the alufoil the negative pole.

So you need to hook up the positive output from the power supply to the
graphite electrode and the negative pole from the power supply to the alufoil.

Depending on how large you make the surface area of these sandwiched layers you
will get a few Farads worth of great capacity.

You could also just use only 2 graphite layers, but then the voltage and capacity is lower.

Then don´t charge it up over 2.7  Volts as then electrolysis will happen which will destroy
the alufoil and could produce hydroxy gases.

Then you can measure with a load resistor the capacity of this selfmade supercap
by watching, when it will have discharged to the timeconstant RC voltage level = 0,368 % of the full voltage
tau=RC  => C= tau/R

So for example if you charged up this selfmade supercap to 2.5 Volts and hook
up a 100 Ohm load resistor, watch ( count the seconds) , when the voltage will have decreased to
2.5 Volts *  0,368 = 0.92 Volts and use this time in seconds to calculate the capacity C.

In this example, if the time it took to discharge from 2.5 Volts to 0.92 Volts was 200 seconds,
the  capacity would be:
C= 200 seconds / 100 Ohm= 2 Farad.



Also red and yellow LEDs could be directly powered by such a DIY supercap.

Have fun and post a few pictures of your selfmade supercap.

P.S. Charcoal is not very conductive, but you could also try it with it.
But better use the method posted over here to make your own real
highly conductive graphite powder from a real coal briquet.

See here:
http://www.overunity.com/index.php?topic=790


Free Energy | searching for free energy and discussing free energy

selfmade homemade DIY supercap ultracap bcap boostcap
« on: November 26, 2009, 05:51:54 AM »
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Offline RAF

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Re: selfmade homemade DIY supercap ultracap bcap boostcap
« Reply #1 on: November 26, 2009, 07:16:07 AM »
Again I’m not sure if this is rude or not,

as I understand, The super caps use activated carbon.
I thought of trying this as well ,,,,, “out side the house”
activated carbon has more surface area than carbon and
can be bought at most hardware stores in the form of
drinking water filters. It will need a good crushing,
maybe some screening to get a consistent grit size.
Oh Ya you can get this at the fish store too.

Just a thought

Al

Free Energy | searching for free energy and discussing free energy

Re: selfmade homemade DIY supercap ultracap bcap boostcap
« Reply #1 on: November 26, 2009, 07:16:07 AM »
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Offline onthecuttingedge2005

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Shewbread High density Carbon Capacitor
« Reply #2 on: November 26, 2009, 07:59:02 PM »
I am conducting an experiment right now in making high density carbon capacitors using burnt bread, the bread remains porous as it is being toasted into a peace of black carbon with ultra high surface area.

I will test the conductivity first, if it pans out I will see about fixing some aluminum foil contacts for terminals.

if the experiment is successful then I will proceed to assemble a Shewbread capacitor pile and test capacitance.

Jerry 8)

Free Energy | searching for free energy and discussing free energy

Shewbread High density Carbon Capacitor
« Reply #2 on: November 26, 2009, 07:59:02 PM »
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Offline onthecuttingedge2005

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Re: selfmade homemade DIY supercap ultracap bcap boostcap
« Reply #3 on: November 26, 2009, 08:21:36 PM »
after a kitchen full of smoke from toasting the shewbread to a pitch black peace of carbon the conductivity test is successful.

the peace of burnt toast measures 1/4 inch in thickness and measures 23M ohms in resistance from backside to front side. this is a good sign.

it will help if a flat weight is placed on the shewbread while toasting to prevent deformity of the bread so that the bread remains flat.

after the thanksgiving festival I will assemble the Ultra cap pile to test for capacitance.

happy thanksgiving to all.
Jerry ;)

Offline onthecuttingedge2005

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Re: selfmade homemade DIY supercap ultracap bcap boostcap
« Reply #4 on: November 27, 2009, 01:36:52 AM »
the plan

Offline onthecuttingedge2005

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Re: selfmade homemade DIY supercap ultracap bcap boostcap
« Reply #5 on: November 27, 2009, 04:32:51 AM »
here is what I am settling on for the first prototype of the Shewbread Capacitor.

any idea's to add?

Free Energy | searching for free energy and discussing free energy

Re: selfmade homemade DIY supercap ultracap bcap boostcap
« Reply #5 on: November 27, 2009, 04:32:51 AM »
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Offline onthecuttingedge2005

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Re: selfmade homemade DIY supercap ultracap bcap boostcap
« Reply #6 on: November 27, 2009, 05:42:31 AM »
just a reminder.

for the shewbread capacitor.

1. remove the bread crust off of the bread with a razor blade.

2. use a mold or a flat plate(not to heavy) and place it on top of the bread to keep the shrinking of the bread from deforming the bread while it is being converted to carbon. if the plate is to heavy you might lose some of your porousness in the carbon once toasted to a charcoal consistency.

3. use proper ventilation when over toasting your bread. lots of smoke!

4. when selecting your bread of choice, look for the amount of pores per square centimeter, the greater the pores the better the surface area.

5. ask yourself, why did he call it a shewbread capacitor? look up shewbread on wiki and you'll find out why I called it a shewbread capacitor.

6. try to get the burnt toast as close to 99% converted to porous carbon and to make an analogy of this, it is a burnt offering before the Lord. lol

7. just to make this more weird, I am a son of David and a Carpenter. for those are names not professions. I have been drinking a little but I have not told any untruth.

I always get spiritual when I am drinking, I guess it is the spirits in the drink! I do apologize for all those atheists. I do try to keep this on a professional level when I am sober though. but hey. it is Thanks Giving and so. I am giving.

8. remember, if you become rich off of my idealism then please contribute to my spaceship, I would greatly appreciate it. I have a spaceship to build.

Jerry 8)
« Last Edit: November 27, 2009, 07:08:33 AM by onthecuttingedge2005 »

Offline hartiberlin

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Re: selfmade homemade DIY supercap ultracap bcap boostcap
« Reply #7 on: November 27, 2009, 01:42:32 PM »
after a kitchen full of smoke from toasting the shewbread to a pitch black peace of carbon the conductivity test is successful.

the peace of burnt toast measures 1/4 inch in thickness and measures 23M ohms in resistance from backside to front side. this is a good sign.

it will help if a flat weight is placed on the shewbread while toasting to prevent deformity of the bread so that the bread remains flat.

after the thanksgiving festival I will assemble the Ultra cap pile to test for capacitance.

happy thanksgiving to all.
Jerry ;)

Hi Jerry,
interesting idea with the burnt toast, but:
1. You should definately do that outside as inhaling the smoke is dangerous
2. 23 MOhms is much too unconductive !

Just use the method to fire up a few coal briquets and let them
glow hot red for a while and when they have a white ash surface
and will still glow inside, then the carbon from the coal has transformed
to a very good conductive graphite...

They then look as if they have almost completely burnt up,
but when you put them into a metal box, so it kills the oxygen air supply,
the burning will stop and inside the white ash they will still
have black powder, which is the graphite.

( Be careful, the metal box will get very hot
as they have stored a lot of heat energy, when they
still glow read hot !)

This graphite then will have about 10 to 100 ohms per cm distance,
which is very nicely conductive.
This good conductivity is needed for a good supercap.

Regards, Stefan.

Offline teslaalset

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Re: selfmade homemade DIY supercap ultracap bcap boostcap
« Reply #8 on: November 27, 2009, 02:05:03 PM »
Graphite powder can be easily bought online. It's about 10 euro/kg, e.g:
http://www.kremer-pigmente.de/shopint/index.php?cat=0102&lang=ENG&product=47710

Offline PaulLowrance

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Re: selfmade homemade DIY supercap ultracap bcap boostcap
« Reply #9 on: November 27, 2009, 03:35:05 PM »
What a great thread! Here's a good forum on ultracaps that includes numerous threads on how to make homemade ultracaps,

http://www.ultracapacitors.org/

Here's one thread, titled, "Home made supercaps"
http://www.ultracapacitors.org/index.php?option=com_fireboard&Itemid=99&catid=8&func=view&id=339

If someone has a program to backup this thread, then that would be great in case something happens to it. This guy go into detail how to make a DIY supercap. Some of these DIY supercaps are at least 150F.

Regards,
Paul

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Re: selfmade homemade DIY supercap ultracap bcap boostcap
« Reply #9 on: November 27, 2009, 03:35:05 PM »
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Offline Paul-R

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Re: selfmade homemade DIY supercap ultracap bcap boostcap
« Reply #10 on: November 27, 2009, 06:24:36 PM »
What capacity and voltage rating are you guys expecting?

Offline MileHigh

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Re: selfmade homemade DIY supercap ultracap bcap boostcap
« Reply #11 on: November 28, 2009, 12:28:13 AM »
Quote
What capacity and voltage rating are you guys expecting?

Great question!  I have a feeling it is going to be in microfarad territory, not supercap territory.

Experiment and learn as they say.  You will probably need scopes to measure your capacitance's.

MH

Offline hartiberlin

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Re: selfmade homemade DIY supercap ultracap bcap boostcap
« Reply #12 on: November 28, 2009, 03:45:14 AM »
It depends only on the surface contact area between the alufoil and graphite.

If you are using 1 x 1 meter of alufoil and 1 x 1 meter of graphite paper,
you should expect a capacity in the range of 100 Farad or more.

Have a look at this good PDF file:

http://www.ansoft.com/firstpass/pdf/CarbonCarbon_Ultracapacitor_Equivalent_Circuit_Model.pdf


Regards, Stefan.

Free Energy | searching for free energy and discussing free energy

Re: selfmade homemade DIY supercap ultracap bcap boostcap
« Reply #12 on: November 28, 2009, 03:45:14 AM »
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Offline Robert

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Re: selfmade homemade DIY supercap ultracap bcap boostcap
« Reply #13 on: April 06, 2012, 05:41:37 PM »
AA batteries have carbon cores that can be reused....

Old batteries is an endless supply of carbon powder.

Offline V_Schaub

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Re: selfmade homemade DIY supercap ultracap bcap boostcap
« Reply #14 on: March 20, 2013, 04:09:24 PM »
Hi.
I have few questions regarding the main design in this topic.
In my test project i want to create 400V capacitor bank to charge one 2kw device for one hour.

1.) How much supercapacitors should I build to make this work and how much Farrads should one SC need to have ?

2.) If i use aluminum/salt/graphite (active carbon or maybe graphene ) design, would it be possible to create 400V / 200F capacitor ? The size does not matter, it can be big cca 1 meter and over 50cm thick

3.) When you put saltwater between graphite and aluminum you have created battery. My question would be:
What will happend when aluminum will be coated with aluminum oxide. Basically when aluminum starts to oxidize ? Will the supercapacitor still work / will it loose its capacity or something else ?

4.) What would happend if i would use carbon or graphite as second plate ( instead of aluminum ) ?

Thank you in advance for your ideas/comments !

 

Free Energy | searching for free energy and discussing free energy

Re: selfmade homemade DIY supercap ultracap bcap boostcap
« Reply #14 on: March 20, 2013, 04:09:24 PM »

 

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