RE:I belive Nano has been working with one 2-3 years Yes, that could be true in terms of time!
“The interest in the LNMO material is largely due to the high cell voltage (4.7V) and the high rates of charging available with this material.”
https://www.bestmag.co.uk/nano-one-patent-could-lead-cobalt-free-lithium-ion-battery/