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Author Topic: Graphite-Paper - Aluminium-Foil galvanic cell with 1.7 to 1.92 Volts  (Read 81782 times)

Offline donkrueger

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Re: Graphite-Paper - Aluminium-Foil galvanic cell with 1.7 to 1.92 Volts
« Reply #60 on: April 14, 2011, 10:25:54 PM »
 Stefan your work sounds cool. I an't see the videos because of the YT flap, but I found another link on YT for Stanford University that has some cool work similar to yours. Here's the link if you want to take a look. ou can paste it into the search bar on YT.
Don  :D     http://www.youtube.com/watch?v=QPTcQJPbGHw

Free Energy | searching for free energy and discussing free energy


Offline hartiberlin

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Re: Graphite-Paper - Aluminium-Foil galvanic cell with 1.7 to 1.92 Volts
« Reply #61 on: February 25, 2012, 11:12:41 PM »
Stefan your work sounds cool. I an't see the videos because of the YT flap, but I found another link on YT for Stanford University that has some cool work similar to yours. Here's the link if you want to take a look. ou can paste it into the search bar on YT.
Don  :D     http://www.youtube.com/watch?v=QPTcQJPbGHw

Yes, not bad, but my lampblack-Acryl-Binder-Alufoil battery with a water-K2CO3 electrolyte has the advantage, that it does not need
any dangerous lithium and only the alufoil is consumed and the lampblack ( graphite-paper ) electrode is not consumed and can be reused
several times and is really cheap to be selfmade !
I don´t need nanocarbon... I can even do my own very conductive graphite from normal coal briquetts by using
red glowing coal briquetts and putting them out in a metallic box, so the inner not yet burned coal has been converted to
highly conductive graphite powder. ( The black powder below the ash layer...!)

It is very simple.

Regards, Stefan.


Offline hartiberlin

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Re: Graphite-Paper - Aluminium-Foil galvanic cell with 1.7 to 1.92 Volts
« Reply #62 on: February 25, 2012, 11:22:24 PM »
Okay guys, I am back with some experiments.

I just did the day before yeasterday a few introduction experiments and now today the rest of the series,
cause I wanted to see, how good also magnesium alloy rods like AZ1X and AZ61A and finally again a Durafix Zamak Alloy rod
would work with the
K2CO3 - water electrolyte.

These alloy rods were a failure as you can see in the videos. Murphy´s law allways hits first ! ;)

But then I finally repeated the alufoil- K2CO3-water lampblack-Acrylbinder-paper cell and it was a huge success

with only about 2 cm^2 area I got 1.6 Volts open circuit voltage and over 20 mA short circuit current  !

Well have a look for yourself here at my newest videos ! These are 32 parts all in all... so you need a bit time to watch it all and they are still uploading,
cause they are in huge HD resolution.

Enjoy !

http://www.youtube.com/user/overunitydotcom/videos



Regards, Stefan.
« Last Edit: March 07, 2012, 01:51:43 AM by hartiberlin »

Offline b_rads

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Re: Graphite-Paper - Aluminium-Foil galvanic cell with 1.7 to 1.92 Volts
« Reply #63 on: February 28, 2012, 05:24:15 PM »
Stefan,
Wow, alot of catching up to do.  You have been a very busy fellow.  Your work is very impressive and cannot wait to give it a go.  Curious, have you tried zinc yet?  Thank you for all the nice things you have said on my videos.  Time to start reviewing what you have done - going to be busy it appears.
 :)
Brad


Offline hartiberlin

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Re: Graphite-Paper - Aluminium-Foil galvanic cell with 1.7 to 1.92 Volts
« Reply #64 on: March 07, 2012, 01:50:10 AM »
Hi Brad,

No I haven´t tried Zinc yet. to hard to get for the normal user...

I still need to get me some Zinc metal to test it out with it instead of Alufoil.


The next thing I will do soon is videotaping the making of a big graphite paper electrode and run
an incandescent bulb with it with Aluminium foil and K2CO3 electrolyte.

I still need to get me some Zinc metal.

But then I wll further try better to use some oxides like
TiO2 and ZnO to make only some graphite cells that would hopefully put out also
power without anything corroding at all.
Maybe we can get a cell to work without any pute metal at all which will
just convert the background radiation or just the
infrared radiation to electrical power.

Surely it must be possible with the right material to tap into this background radiation
and make cells that do not corrode and will convert this radiation on 24/7 daily basis.

Probably these cells will not be so powerfull, but if they are cheap to make it is only a question to scale
the used surface area up and thus get more power. If they will only use lampblack, paper and a bit Acryl Binder
and cheap TiO2 and ZnO, these will be dirt cheap to make and they will be easy to be selfmade without high
cost equipment. Then stacked these will probably totally replace any solar cell installations, cause they will work 24/7/365.

Regards, Stefan.

Free Energy | searching for free energy and discussing free energy

Re: Graphite-Paper - Aluminium-Foil galvanic cell with 1.7 to 1.92 Volts
« Reply #64 on: March 07, 2012, 01:50:10 AM »
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Offline broli

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Re: Graphite-Paper - Aluminium-Foil galvanic cell with 1.7 to 1.92 Volts
« Reply #65 on: March 10, 2012, 10:16:51 AM »
In my graphene research I found this process to make small graphene sheets out of graphite using a simple electrochemical process. Here's a video of it:

http://idv.sinica.edu.tw/lanceli/electrochemical%20exfoliation%20%28H2SO4%29.mov

Perhaps using this nano material can enhance the voltage/current of your battery.


Free Energy | searching for free energy and discussing free energy

Re: Graphite-Paper - Aluminium-Foil galvanic cell with 1.7 to 1.92 Volts
« Reply #66 on: March 10, 2012, 01:50:07 PM »
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Offline PhiChaser

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Re: Graphite-Paper - Aluminium-Foil galvanic cell with 1.7 to 1.92 Volts
« Reply #67 on: March 10, 2012, 06:53:52 PM »
@ Stefan:
You can find zinc strips for killing moss in the garden department at your local hardware store. They also make a zinc (may be zinc oxide?) paint which may work well if sprayed onto paper? You could use the other side for something else??

Happy experimenting,
PC

Offline hartiberlin

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Re: Graphite-Paper - Aluminium-Foil galvanic cell with 1.7 to 1.92 Volts
« Reply #68 on: March 11, 2012, 04:52:38 PM »
In my graphene research I found this process to make small graphene sheets out of graphite using a simple electrochemical process. Here's a video of it:

http://idv.sinica.edu.tw/lanceli/electrochemical%20exfoliation%20%28H2SO4%29.mov

Perhaps using this nano material can enhance the voltage/current of your battery.

Many thanks for this video.

Are you sure that this decomposed Graphite sheet was then graphene ?

How strong was the H2SO4 acid solution ? What percentage ?

What was used as the other electrode ?

How much graphene to graphite ratio did you get out of the powder when filtrated out ?
How much more conductive is graphene then ?

Many thanks.

Regards, Stefan.

Offline hartiberlin

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Solar cell from graphite and iron pyrite ?
« Reply #69 on: March 11, 2012, 05:00:22 PM »
Many thanks also for the united nuclear link.


Well, does anybody have an idea, how to get a very thin coppersulfide or iron pyrtite ( iron-sulfide) layer
onto the graphite paper electrode ?

If there would be any easy method via electroplating or via a solution to
get a thin layer of these materials onto the graphite paper layer we might just get an easy solar cell.

As coppersulfide and iron-sulfide are semiconductors we might get a good bandgap and thus a PN layer
for converting sunlight directly to electricity.
As iron poyrite is also conductive we would NOT need an additional layer to collect the current!
So just oine electrode would be graphite paper and the other electrode would be iron pyrite  ( iron-sulfide).

The question now is, how to bring a nanometer thick layer of this iron pyrite onto the graphite paper cheaply...

Any ideas ?

Regards, Stefan.

Free Energy | searching for free energy and discussing free energy

Solar cell from graphite and iron pyrite ?
« Reply #69 on: March 11, 2012, 05:00:22 PM »
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Offline broli

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Re: Graphite-Paper - Aluminium-Foil galvanic cell with 1.7 to 1.92 Volts
« Reply #70 on: March 11, 2012, 06:28:33 PM »
Many thanks for this video.

Are you sure that this decomposed Graphite sheet was then graphene ?

How strong was the H2SO4 acid solution ? What percentage ?

What was used as the other electrode ?

How much graphene to graphite ratio did you get out of the powder when filtrated out ?
How much more conductive is graphene then ?

Many thanks.

Regards, Stefan.

This is not my work but that of a chinese research group doing nano technolgy research. You can find the experiment fully described in their paper here:

http://idv.sinica.edu.tw/lanceli/Paper%20PDF/High-Quality%20Thin%20Graphene%20Films%20from%20Fast%20Electrochemical%20Exfoliation.pdf

But I'll try to answer your questions as well.

Are you sure that this decomposed Graphite sheet was then graphene ?
Yes I'm sure, that's what the research was aimed for.

How strong was the H2SO4 acid solution ? What percentage ?
This is what the paper says: 4.8g of 98% H2SO4 diluted in 100mL of deionized (DI) water

What was used as the other electrode ?
"A Pt wire was chosen as a grounded electrode."

How much graphene to graphite ratio did you get out of the powder when filtrated out ?
I believe most of the electrode that exfoliated are thin graphene sheets.

How much more conductive is graphene then ?
No idea in this case.


Offline PhiChaser

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Re: Graphite-Paper - Aluminium-Foil galvanic cell with 1.7 to 1.92 Volts
« Reply #71 on: March 11, 2012, 10:49:27 PM »
@ Stefan: The pultruded carbon tube I have been using for one of the electrodes (the other is aluminum) in my battery experiments has a very low resistance; Between 5-10 ohms per foot (or thereabouts) according to my digital meter. I will have to test with analog meter for better measurements, sorry... It is NOT something you would want to grind up though!! Pretty sure they use a high purity carbon powder and expoxy resins to make the stuff..
Now that I look at my dwindling supply, I think I need to order some more. The last batch I got was from dragonplate.com which has been good to me in the past.

Happy experimenting,
PC


Offline Cherryman

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Re: Graphite-Paper - Aluminium-Foil galvanic cell with 1.7 to 1.92 Volts
« Reply #72 on: March 12, 2012, 10:24:34 AM »

Offline Curious_Celt

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Re: Graphite-Paper - Aluminium-Foil galvanic cell with 1.7 to 1.92 Volts
« Reply #73 on: June 09, 2013, 03:40:41 AM »
Hi, I'm new to this forum, and have mostly just been reading, and from what I've read so far I am way behind the rest of you guys. But I gotta start somewhere...

As it happens, I made one of these graphite/paper/aluminium foil cells a few nights ago, just to see if I could, and because my brother lives off-grid and wanted me to show him how to make a water/alkali battery, as a back-up to the humungus pile of lead-acid forklift batteries that he currently uses for power.

I have been medically retired for the last 25 years with multiple sclerosis, and my hands don't work so good. However, I succeeded after about three hours, and with a half tea-spoon of caustic soda in a 3/4 pint of water my cell was almost immediately wacking out 1.8VDC at 5.5mA. The cell produced enough energy to light an LED from a defunct solar garden light for about five minutes, which I have to admit, really impressed me, as those LEDs don't even switch on much below 2V.

As a way to while away the time, brilliant. But then later I worked out the cost of making my cell. Came out at £18.59 (including a modest £5/hour labour cost). It would be cheaper for me to go to Morrisons and buy a pack of their AA cells, because I would get six for a quid!

But, at least I now know how to make one if the world ended tomorrow.

On a practical note - has anybody tried using carbon/graphite rods larger than ordinary pencil leads, such as leads from carpenters pencils or carbon arc welding rods, or maybe the recycled carbon rods from dud D cells. The one thing I found with making these really small cells was that the pencil leads are really fragile, and for clumsy sods like me, something thicker would serve two purposes. 1 - the carbon/graphite would not break so easily (which is why it took me three hours), and 2 - the surface area of the carbon/graphite would be greatly increased, thereby giving an increase in current.

I did some measurements and found that for the three pencil leads I used, the total surface area was 33 sq. cm, giving a total electrode area of approximately 66 sq cm. Power density worked at about 0.3 watts per sq cm, which I though was quite good for a rough-made cell. And of course these cells have an advantage over commercial cells. They are recyclable. Just replace the aluminium when it is too corroded, and refresh the electrolyte. Hope I haven't bored too many of you with this...


Offline neazoi

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Re: Graphite-Paper - Aluminium-Foil galvanic cell with 1.7 to 1.92 Volts
« Reply #74 on: September 12, 2013, 11:04:56 AM »
Yesterday I tried a battery made out graphite and aluminum with NaOH electrolyte.
I had not seen this thread until today. My experiment was based on the galvanic tables I have seen on the net. I had also the same thoughts as some of the people in this thread, as far as concern the good and bad electrodes, as well as the easiness of finding them.

My goal:
"Making a battery instead of buying one has only sense if it can be made quick, cheap and easily, and this includes the reusability and the cost of parts"

I will post a picture as long as I get back home, but the preliminary results are these:

I used a graphite square rod, taken out of these artists sketch sets, instead of scrapping the fradgile graphite out of a pencil. These sets cost about 2Euros and they contain about 16 rods, of different hardness. The one I have tried marked with an "H". There are others marked with HH, BH etc, which I will try. These represent the hardness of the rod, because sketch artists want rods with different hardnesses. I have not yet measures the resistance of the rod, I will do so.

For the other electrode I used a sheet of aluminum (I thought also that magnesium would be best, but only aluminum is widely available to the consumer). Since aluminum will eventually get consumed, I would like to try cheap aluminum foil as well.

Ok the results. I have tried the battery with a joule thief I have made here http://qrp.gr/energy-harvesting
The LED shines brightly, more brigtly than my previous aluminum/copper/vinegar-salt battery, and it also lasted all night. This morning I slightly tapped my hand on the graphite electrode and then the led continued to lights brightly again. I had not time to watch it more, so I will make some tests today too.

Free Energy | searching for free energy and discussing free energy

Re: Graphite-Paper - Aluminium-Foil galvanic cell with 1.7 to 1.92 Volts
« Reply #74 on: September 12, 2013, 11:04:56 AM »

 

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