Site-dependent electrochemical performance of Na and K co-doped LiFePO4/C cathode material for lithium-ion batteries

In this study, Na and K co-doped LiFePO₄/C samples with controlled Na and K sites, i.e., the Li_1−x−yNa_xK_yFePO₄/C and LiFe_1−x−yNa_xK_yPO₄/C (x = 0.02, y = 0.01) have been first synthesized via a common solid-state synthesis and the effects of the alien metal occupied site on the structure, morphology and electrochemical performance of LiFePO₄/C are studied.