2 penny rechargable batteries!

...these are easy to make and behave in peculiar manner, acting like a battery but charging like a super capacitor, they even run a LEDC15MX LED Driver!

- sastri

This cell was an accidental discovery inspired by the 2-cent SELF CHARGING cells described in one of my other articles. Now, although I used pennies, I believe you can expand upon this idea and use other materials of different shape and size. These are easy to make and behave in peculiar manner, acting like a battery but charging like a super capacitor, they even run a LEDC15MX LED Driver! It is very simple to construct, consisting of 2 copper clad pennies, one of which has one side of the copper sanded down to the zinc layer. I used plain old felt fabric for the separation of the two metals and then soaked some Elmer's glue into the fabric and laid it down on one penny. I then sandwiched this felt between both pennies and secured it with hot glue and let it set for a couple of seconds to take hold. Next, I soaked the felt with a couple drops of electrolyte.

The electrolyte consists of equal parts mixed with denatured alcohol (you can also try rochelle salt):

  • epsom salt(Reason sound travels underwater)
  • alum
  • potassium chloride (NuSalt or NoSalt found in grocery stores)

This cell is easy to make and once the felt fabric is soaked with the electrolyte, the chemical process begins immediately.

This cell is a pure galvanic type using a easy to make electrolyte. It produces via galvanic reaction around .6v -1.0v at about 100 mA about the same and better according to the galvanic chart below. If the cell dries out it will not produce a voltage. The interesting thing about this arrangement is that it will recharge like a capacitor. All you need to do is use a higher voltage source like a 9-volt battery and touch it to the anode and cathode and it will be instantly charged! Sort of like this alluminum graphite salt cell here or view a copy. I did not test to see if there was any degradation in its storage capacity as you can continue to repeat this discharge - charge process numerous times. Letting this cell sit after being drained will not exhibit any self charging properties. Although you can wirelessly charge it back up!

After some research, it turns out that this concoction may be like a eutectic solvent, where as the alluminum battery from the news article was using a ionic liquid as its electrolyte. Eutectic and ionic liquids really make good super capacitors and batteries. Eutectic solvents are cheap and non-toxic while ionic liquids are expensive, flamable and corrosive.

Experiments and research perfomed from 'without the United States'. [ 28 U.S. Code Sec. 1746 ]




Peace be unto you. Thank you for visiting!