QuantumScape could address several things hindering EV sales growth.There's no lack of interest from investors regarding QuantumScape (QS -3.58%) stock. The electric vehicle (EV) battery start-up is trying to solve some of the biggest headwinds to EV sales growth. Range anxiety, charging times, and battery safety are keeping some potential EV buyers on the sidelines.If QuantumScape's solid-state battery technology solves those issues, the potential market is enormous. That's why it seems QuantumScape stock ...