Anyone who ever watched the original Star Trek series knows that the early starship warp drive reactors were powered by lithium crystals. The series was set in the 23rd century, so we still have to wait about 200 years until lithium crystals become common as a power source on starships. This is not to say the crystals will not be used earlier in other systems.
I believe Scotty said they wer “Di-Lithium Crystals” Captain. And sheez, they were always on verge of blowing up or something.