High-Capacity, High-Cycling Cathode Material Synthesized by Low-Temperature Solid-State Coordination Method for Lithium Rechargeable Batteries

Cathode materials of the family were successfully synthesized by a low-heating-temperature solid-state coordination method using lithium acetate, manganese acetate, lithium fluoride, citric acid, and polyethylene glycol (PEG) 400 as raw materials. X-ray diffractometry (XRD) proved that the powders were well-crystallized pure phase. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that the powders consisted of small and uniformly sized particles, with the diameter of the particles about . Galvanostatic cycling results suggested that the gave an initial capacity of and had a retained capacity of at the within the potential range from and of 129 and between 3.0 and , respectively, which indicated that the sample possesses excellent electrochemical properties. The introduction of Li and F in apparently increases the capacity and significantly decreases the rate of capacity degradation during charge-discharge cycling.