China’s electrified-vehicle market took root in 2010 after Beijing rolled out a generous subsidy program. Sales of EVs and plug-in hybrids have expanded at a breathtaking pace ever since. Yet, except for BYD, profits are nowhere in sight for many domestic companies venturing into the EV sector, be they traditional automakers or major EV startups.

Where are current systems coming up short? To answer this question, we first need to take a closer look at the different technologies that are being used.

This year's PACE Awards are a reminder of the industry's penchant for pushing the envelope and turning smart ideas into innovative technology.

Vague language in an otherwise aspirational proposal by GM and the Environmental Defense Fund to cut greenhouse gas emissions hints at inflating credits for electric vehicles.