Enhancing the electrochemical performance of LiNi_0.5Mn_1.5O₄ cathode material by Li⁺/F⁻ co-doping

Abstract A solid-state ball-milling method was used to prepare the Li + /F − co-doped LiNi 0.5 Mn 1.5 O 4 materials. XRD characterizations reveal that co-doping decreases x Ni 1-x impurities contents and enhances structural stability. It can be seen from SEM analysis crystal morphology of material changes into a phase octahedron because co-doping. The electrochemical performance tests results show 1.03 3.97 F 0.03 possesses higher rate capability. Specifically, discharge capacity at 2, 3, 5, 7 C-rate 127.3, 120.4, 103.3 79.0 mAh·g −1 , respectively, while Pure LNMO yields only 117.7, 109.8, 88.3 54.2 .