Nanosized LiCrO 2·Li 2MnO 3 composite powders are prepared by a new concept spray pyrolysis. The precursor and post-treated powders have a Li 2CrO 4 impurity introduced by the partial oxidation of LiCrO 2. The powders have a pure layered structure corresponding to the LiCrO 2·Li 2MnO 3 composite after Li 2CrO 4 is removed by washing with distilled water. The real composition of the washed cathode powders is Li 1.18Cr 0.404Mn 0.477O 2. The aggregated post-treated powders are converted into nanosized powders after washing with distilled water; milling is not required for this conversion. The mean size of the nanosized LiCrO 2·Li 2MnO 3 powders is 48 nm. The LiCrO 2·Li 2MnO 3 cathode sample post-treated at 750 °C has initial charge and discharge capacities of 272 and 233 mAh g -1 at a constant current density of 18 mA g -1, respectively. The discharge capacity of the cathode sample post-treated at 750 °C decreases from 233 to 222 mAh g -1 by the 44th cycle, in which the capacity retention is 95%.
Bibliographical noteFunding Information:
This research 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 ). This study was also supported by Seoul R&BD Program ( WR090671 ).
- Cathode material
- Lithium battery
- Lithium rich
- Spray pyrolysis
ASJC Scopus subject areas
- General Chemical Engineering