Is there any substance to the recent claim by EEStor that they have made a major breakthrough in ultra-capacitors that makes them far superior to any of the most advanced batteries?
NO. The patents they keep talking about (7,033,406, and 7,466,536) are mostly hypothetical. What they describe there, with numerous irrelevant calculations, is not an ultra-capacitor. It’s a conventional multi-layer ceramic (MLC) barium titanate capacitor with a different method of making the ceramic dielectric. The best MLC capacitors have had energy density of 0.007 Whr/kg; the best electrolytic capacitors are about 0.3 Whr/kg; ultra-capacitors can exceed 10 Whr/kg; carbon-lead-acid batteries are 70 Whr/kg; and lithium-ion batteries can be 150 Whr/kg. Have they improved on the multi-layer, high-voltage, Y5V-type ceramic capacitor? Perhaps. Barium titanate has been used for many decades, but their multi-layer coating and polarization process of the fine powder prior to sintering will improve voltage handling by more than it reduces dielectric constant. We’ve gone through some detailed analysis (which will be available later) that suggests it’s likely they’ll be able to achieve about 0
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