A novel approach to composite electrode 0.3Li2MnO3–0.7LiMn1/3Ni1/3Co1/3O2 in lithium-ion batteries with an anomalous capacity and cycling stability at 45.4 °C

Composite 0.3Li2MnO3–0.7LiMn1/3Ni1/3Co1/3O2 was prepared by a novel approach based on a two-step molten salt process. At 0.5C, the composite electrode delivered a high initial capacity of 191.5 mAh g−1 at room temperature, which improved up to 233 mAh g−1 as temperature increased to 45.4 °C. Accordingly, the fading rate decreased from 1.44 to 0.43% per cycle. The abnormal capacity and cycling stability at elevated temperature make the composite an attractive cathode for high-temperature lithium-ion batteries.