What I tried tonight

A project log for Monolithic Cotton Supercapacitors

HAL 9000: I am putting myself to the fullest possible use, which is all I think that any conscious entity can ever hope to do.

MECHANICUSMECHANICUS 03/22/2016 at 12:000 Comments

Graphene, SiO2(DE crystalline), CuCl2, Carbon Black Cathode/ N-AC anode/ K2SO4 aqueous electrolyte

-Result horrible performance .6 volts and rapid leakage

CuCl2 Graphene Cathode/ N-AC anode/ DMSO KOH PVA electrolyte

-Poor Performance not better than aqueous electrolyte

CuCl2 Cathode/ N-AC anode/ .5 Molar K2SO4 aqueous electrolyte

-Ok results .6 volts around 200 farads per gram

Symmetric EDLC capacitor with N-AC for both electrodes/ K2SO4 aqueous electrolyte

-Superb results very fast cycling and charging typical 50 farads per gram EDLC performance 1.9 volts potential rivaling exotic organic electrolytes.

-Needs Carbon Black for increased conductivity of electrodes, as discharge was a little slow

N-AC in polyurethane painted very well

Tried 6 N-AC electrodes in parallel and had 150mA leakage current best guess is unbalanced electrodes, but painting by hand this is to be expected.

Moving forward Li2SO4 comes on thursday and is much more soluble in water, will retry EDLC with 2 molar solution instead of .5 molar K2SO4

Improvements to be made to CuCl2 ultracapacitor are adsorbing the transition metal chloride into activated carbon to increase conductivity of the colloid. Most likely requires KOH or LiOH to function properly, results were poor with K2SO4.

I started ball milling some DE amorphous with MnO2 as the SiO2 should increase the psuedocapacitive effect on the cathode.

Need to retest CuCl2 SiO2 with KOH electrolyte.

Need to nitrogen plasma functionalize MWCNT and try with K2SO4.

Need to oxidize AC with H2O2 35% and test vs Microwave nitrogen plasma functionalized, as well as ammonia functionalized ox-AC.

Need to test potassium iodide as redox mediator in transition metal oxide, ie MnO2 SiO2 cathode. .1 molar concentration in K2SO4.