Figure 5b has a description that reads "Cyclic voltammograms for symmetric supercapacitors using 1 M H2SO4 aqueous electrolyte and poly(vinyl alcohol)/H2SO4 gel electrolyte". Looks like you can either submerge the bricks in a solution or have a gel layer between them to produce the actual capacitor structure.

So it takes two bricks to make one capacitor with the gel between them?

They must be in sulfuric acid? So we’re not building houses out of this any time soon.

I don't think this would be for building homes, it would just be a potentially cheap way to build large capacitor banks for homes.

It would probably help with rodent and insect problems though...