The recipe for preparing a home-made supercapacitor is shown here. Newer video is here    • Supercapacitor - how to make, for a g...   .
Improved versions (shown in the last part of the video) have 800 F of capacitance per single Tic-Tac case, 1.2 V voltage and 6 A of short-circuit current.
You need only some chemicals from the kitchen, such as water cleaning filter's active carbon, sewer cleaning liquid (NaOH, but KOH is better), iron mesh, epoxy glue, shade cloth or paper for membrane and an empty Tic-Tac case. It is important to add only small amount of epoxy glue and it works when the size of carbon particles is between 0.2 and 2 mm.
Notice that there is a mistake in the video, correct formula is C=time/0.69/R.
If you don't want to demolish your kitchen table then the carbon electrodes can be obtained from http://www.superaccu.com .
The original version of this video won a Novaator science video contest in Estonia (don't confuse with Elbonia).
Designed by Taavi Oja and Tavo Romann (PhD).

Check also other DIY batteries and electrochemistry experiments :

Aluminum-air battery    • Homemade aluminum-air battery I - hig...  

Microbial fuel cell    • Microbial fuel cell - DIY Elbonian style  

Making sodium metal    • Making sodium via electrolysis  

DIY supercapacitor
Koduse superkondensaatori valmistamine.
supercapacitor casera
supercapacitor caseiro
самодельные суперконденсаторов
supercondensateur fait maison
hausgemachten Superkondensator
domowe kondensator
supercapacitor feito em casa
自家製のスーパーキャパシタ
ghar ka bana supairchapachitor