SrCO3Assisted Synthesis of Disk-Like Micron-Sized Monocrystalline LiNi0.5Co0.2Mn0.3O2with Preferred (104) Plane and Its Enhanced Cycle Performance

Disk-like micron-sized monocrystalline LiNi(0.5)Co(0.2)Mn(0.3)O(2)is synthesized by the co-precipitation method accompanied with calcination assisted by strontian carbonate without washing process or other complicated treatment. Powder X-ray diffraction, scanning electron microscopy, and transmission electron microscopy are used to characterize the obtained samples. Characterizations reveal that the addition of SrCO(3)help to form monocrystalline LiNi(0.5)Co(0.2)Mn(0.3)O(2)with preferred (104) plane, and the particle is disk-like and in micrometer size. Electrochemical test results indicate that the LiNi(0.5)Co(0.2)Mn(0.3)O(2)exhibits significantly improved capacity retentions of 95.6% and 89.3% after 100 cycles at 1C, for the voltage ranges of 2.8-4.3 V and 2.8-4.5 V, respectively. The excellent cycle performance of the LiNi(0.5)Co(0.2)Mn(0.3)O(2)is ascribed to the unique monocrystalline morphology, high stability of (104) plane and reduced irreversible phase transition.