Batteries or capacitors for electromagnetic carrier catapults

Would the proposed electromagnetic catapult system use batteries or capacitors?

The choice remains open; batteries might supplement generator output, but their performance is questioned and capacitors are another option.

Batteries and capacitors are both considered for the energy storage needed by electromagnetic catapults. Battery use prompts a challenge about the required chemistry and performance. One possibility is to supplement the main turbo-generators when their output falls short. The choice remains unresolved, with capacitors still an alternative.