A F-deficient and high-Mn ternary perovskite fluoride anode with a dominant conversion mechanism for advanced Li-ion batteries.

A F-deficient and high-Mn ternary perovskite fluoride anode (K1.00Ni0.06Co0.14Mn0.80F2.92, KNCMF-3#) has been explored for advanced Li-ion batteries (LIBs), showing a dominant conversion mechanism. Notably, the KNCMF-3#//LiFePO4 (LFP) LIBs furnish an ultra-high performance of 270.5-35.9 W h kg-1/0.63-11.6 kW kg-1/71% retention/5000 cycles/5 A g-1.