Comment Re:Cue the denialists... (Score 1) 213
Fossil fuels are finite too. (Also "rare Earths" aren't particularly rare despite their name). There are battery technologies that don't use cobalt. There are technologies under development that use sodium which is enormously abundant.
There are other types of battery technology being developed for stationary storage - for mass power storage, you don't have quite the constraints you have for mobile power like an electric car so you can use materials that would not be optimal for use in a car or a mobile phone. Unconstrained by weight, you can use flow batteries (some of which have been developed with tremendous energy densities and very high numbers of charge cycles compared to conventional lithium ion type batteries).
Batteries are a *huge* part of our future of electrical generation. It might take a while before the grid is transformed, but it took a long time for the grid to develop in the first place anyway (how many years of engineering development did it take to arrive at the modern highly efficient combined cycle gas turbine power plant, something that would have been scoffed at in the 1970s?)