Nanometer-sized 0.6Li 2MnO 3·0.4LiNi 0.5Mn 0.5O 2 composite cathode powders are prepared directly by high-temperature flame spray pyrolysis. The precursor powders and the powders post-treated at 800 °C exhibit mixed-layered crystal structures comprising layered Li 2MnO 3 and layered LiNi 0.5Mn 0.5O 2 phases. The discharge capacity of the precursor powders decreased from 193 mAh g -1 to 96 mAh g -1 by the 9th cycle, corresponding to a capacity retention of 49.7%. Post-treatment at 800 °C increases the capacity retention of the post-treated composite powders to 94.6% after 50 cycles, corresponding to a decrease in the discharge capacity from 225 to 213 mAh g -1. The post-treated composite powders that contain a high amount of the Li 2MnO 3 phase have a high initial discharge capacity and good cyclability.
Bibliographical noteFunding Information:
This study was supported by the Converging Research Center Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2011-50210 ).
- Cathode material
- Spray pyrolysis
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Process Chemistry and Technology
- Surfaces, Coatings and Films
- Materials Chemistry