Abstract: | The spinel Li‐Mn‐O‐F compound cathode materials were synthesized by solid‐state reaction from calculated amounts LiOH‐H2O, MnO2(EMD) and LiF. The results of the electrochemical test demonstrated that these materials exhibited excellent electrochemical properties. It's initial capacity is ‐ 115 mAh.g1 and reversible efficiency is about 100%. After 60 cycles, its capacity is still around 110 mAh.g1 with nearly 100% reversible efficiency. The spinel Li‐Mn‐O‐F compound possibly has two structure models: interstitial model Li]‐Mn3+xMn4+2‐x]O4Fδ, in which the fluorine is located on the interstice of crystal lattice, and substituted model Li]‐Mn3+xMn4+2‐x]O4‐δFδ, which the fluorine atom substituted the oxygen atom. The electrochemical result supports the interstitial model Li]Mn3+xMn4+2‐x]O4Fδ. |