Comment Re:Sumitomo, really? (Score 2) 18
They deployed some in Japan, but it turned out that even the low temperature ones were not significantly cheaper or better than the rapidly improving Chinese lithium ion ones.
Toyota may be in the same position. They have been promising this for a long time, but if you look at their claims from a few years ago they aren't really any better than what CATL and BYD are shipping today. Theoretically longer lifespan perhaps, but batteries already outlast the rest of the car. BYD is selling cars that charge at 1000kW, so speed isn't really an issue. Modern chemistries are very hard to ignite. Chances are their tech will be expensive when it arrives, so not very competitive.