Pretty sure that's from a Chevy Volt, nothing to do with LiFePO4
If so, LMO aka LiMn2O4 aka Lithium Manganese aka Li-manganese aka IMR.
Back shed is indeed the place to play with all those EV LI chemistries, very risky.
People don't usually use the term "lithium ion" for LFP, even though it is part of the overall family
. Same with LTO.