A study of Elon Musk’s hyperloop super fast mass transit concept finds that it appears to be feasible: Hyperloop sounds crazy … but simulation says it just might work – NBC News.com
A reader points to this article about a project that could triple the energy density of Li-ion batteries with their new composite cathode: Solid State Batteries could double the range of electric cars – NextBigFuture.com.
Seems like there have been announcements every few months for years from companies announcing big increases in Li-ion batteries with improved anodes/cathodes. Hope some of them finally get to market soon.
Meanwhile, Tesla Motors Inc patents a system that combines ” a standard lithium ion battery along with a metal-air battery pack”: Tesla patent describes hybrid battery pack system for EVs – Phys.org