RE:RE:Energy capacity and battery density --- what it really means
The words used by Peter in the Interview was 10 times the battery capacity Defined below:
So it would mean a typical battery in Tesla model 3 of 75Kwh using silicon nano structure anode could store 750 Kwh. Which makes sense since there are more electrons that can be exchanged between the lithium in the cathode and the silicon in the anode as there can be between a graphite anode and lithium cathode. It is thus a measure of storage. The speed of charging and discharging a battery is something different altogether. As it pertains to how fast the transfer of electrons can be made between the anode and cathode. And would be determined by the design of lattice supporting the silicon. I am not a scientist in battery technology but it would be nice to have a definite opinion here.
Battery Capacity
"Battery capacity" is a measure (typically in Amp-hr) of the charge stored by the battery, and is determined by the mass of active material contained in the battery. The battery capacity represents the maximum amount of energy that can be extracted from the battery under certain specified conditions. However, the actual energy storage capabilities of the battery can vary significantly from the "nominal" rated capacity, as the battery capacity depends strongly on the age and past history of the battery, the charging or discharging regimes of the battery and the temperature.