Cobalt, another key material for batteries, is also sharply higher though it has retreated from a high earlier this year. The same is true for metals used elsewhere in the car, such as steel, aluminum and copper, which have also seen in prices traded in public markets rising. There were further increases in late April and another in early May. Prices for lithium, a key material used in EV batteries, have more than doubled in trading markets. Tesla plans to increase production by more than 50% this year, and thus is increasing its demand for batteries by the same amount.
Cobalt is an expensive component.
( z0 component :domain ( z1 uranium ) :mod ( z2 expensive ) )
(z0 / component
    :domain (z1 / uranium)
    :mod (z2 / expensive))
Cobalt is an expensive component .
z0 :mod z2
z0 :domain z1