The study of electrochemical Li-ion (de)insertion in the lithium tantalum phosphate bronze LiTa ₂ PO ₈ structure

Compositions with x = 0.5 and x = 1 lie in a convex hull, which indicates the possibility of Li + insertion into LiTa 2 PO 8 . The discharge/charge capacities were equal to 67 mAh g −1 (1.3 Li per f.u.) and 45 mAh g −1 (0.9 Li per f.u.).