Hybridcarblog has doubts about the power of lithium:
Certainly, when it comes to plug-in vehicles, I’m confident that lithium offers more potential than NiMH. But how much more? Enough to top the 3 percent share of hybrid cars?
Lithium has long been expected to take hybrids to the next level. With the ability to offer more energy-dense batteries, this makes perfect sense. That gives automakers the choice of just creating a lighter battery of the same power, or a much more powerful battery of the same weight. The problem? Well, cost, of course.
The key to this all, just like most everything in the automotive world, is mass production. In the world of hybrids, that’s Toyota. For lithium to really be the next step in hybrids, Toyota has to jump in with both feet. There’s just no other way around it.