Elon Musk has recently stated that they are going to make a big shift to LFP batteries[1]. On the Tesla's quarterly earnings call last week, he stated that iron based batteries will likely eventually be used for almost all battery applications due to the low cost. Iron is cheap and sourced all over the globe. He said airplanes and ships will probably have to still use Nickel and/or Cobalt (but corrected himself later saying only airplanes will probably need them).

[1]https://www.torquenews.com/1/lfp-batteries-pros-and-cons-elo...