Synthesis and Electrochemical Properties of a High Capacity Li-rich Cathode Material in molten KCl-Na2CO3 flux

The growing concern for high energy density lithium-ion batteries requires high capacity cathode materials. Li-rich materials are among the most promising candidates attributing to its high capacity, high safety, and low cost. However, the capacity faded seriously with long cycling which hinders its further application. Here, we report a high capacity Li-rich material with superior rate capacity and well cycling stability. The prepared Li-rich cathode exhibited a high discharge capacity of 270 mA h g−1 with initial coulombic efficiency of 84%, at the current density of 25 mA g−1. In addition, high discharge capacity of 200 mA h g−1 was obtained at the current density of 250 mA g−1 and good cycling stability was delivered with 92% capacity retention after 100 cycles at current density of 125 mA g−1.