Is this the "battery" breakthrough?

This has already been looked over by capacitor experts, and it looks like hogwash-- yes you can make capacitors with ultra-capacity using barium titanate, but as soon as you apply significant voltage, the capacitance of this material goes waaaaaaaaay down. In other words, it may measure 1000 Farads per cm^3 on the capacitance meter, which applies 10mv AC, but as soon as you try applying DC, the capacitance goes down by a factor of 10 or more.

Now *maybe* they've found some way to dope the material with transfrangified Blue Kryptonite to nullify this major contrusion, but that's not mentioned in TFA.