How ultracapacitors work (and why they fall short)

Hang around the energy storage crowd long enough, and you’ll hear chatter about ultracapacitors. Tesla Motors CEO Elon Musk has said he believes capacitors will even “supercede” batteries. What is it that makes ultracapacitors such a promising technology? And where do they fall short?

Tesla CEO: I’d Bet On Capacitors Over Batteries

At the Cleantech Forum in San Francisco on Wednesday, Tesla’s CEO Elon Musk says he bets that it could be capacitors — rather than batteries — that will deliver an important breakthrough for electric transportation, an interesting comment from a CEO whose products are based on lithium-ion batteries