[DManA]

Exhibit Remarkable Power Density . . . could be charged and discharged at a rate 40 to 60 times faster than conventional battery anodes, while maintaining a comparable energy density.

Contradiction?

[decimon]

Exhibit Remarkable Power Density . . . could be charged and discharged at a rate 40 to 60 times faster than conventional battery anodes, while maintaining a comparable energy density.

Contradiction?

I don't see a contradiction. Charge rate is one thing and charge capacity another.

[PapaBear3625]

Exhibit Remarkable Power Density . . . could be charged and discharged at a rate 40 to 60 times faster than conventional battery anodes, while maintaining a comparable energy density. Contradiction?

Energy density = energy per unit weight, effectively how many miles you can drive, or how long your laptop will run, for a given battery weight.

Power density = how fast you can charge it or discharge it. For cars, this will determine peak acceleration.

[r9etb]

Exhibit Remarkable Power Density . . . could be charged and discharged at a rate 40 to 60 times faster than conventional battery anodes, while maintaining a comparable energy density. Contradiction?

I'm not a battery guy, so maybe I'm off base here.... but I think the deal is that batteries with high charge or discharge rates tend to have poor energy density (charge capacity per unit mass or volume), because in order to achieve the high rates you need a lot of exposed electrode area, which means a very high area/volume ratio -- and big batteries.

High energy density means less exposed electrode area, and thus longer charge or discharge times.

The achievement here seems to be that they've increased the exposed area without having to increase the volume.