Modified Sol-Gel Synthesis to Prepare Nanocrystalline LiCo1/3Ni1/3Mn1/3O2 Cathode Suitable for Rechargeable Lithium Batteries

作者：Gangulibabu N; Bhuvaneswari D; Kalaiselvi N^*

来源：Nanoscience and Nanotechnology Letters, 2011, 3(5): 717-722.

DOI：10.1166/nnl.2011.1220

• Modified Sol-Gel Method
• LiCo1/3Ni1/3Mn1/3O2
• Lithium Batteries
• Cycling Reversibility
• Specific Capacity

Phase pure and nanocrystalline LiCo1/3Ni1/3Mn1/3O2 is synthesized at 850 degrees C using modified sol-gel method and the required phase purity is obtained by using a lithium and transition metal ratio of 1.1:1. A combination of citric acid as complexing agent and ammonium per sulphate as gelling catalyst results in the rapid formation of transparent gel, which upon furnace calcination yields phase pure and nanocrystalline LiCo1/3Ni1/3Mn1/3O2 powder. Powder X-ray diffraction pattern confirms the formation of phase pure LiCo1/3Ni1/3Mn1/3O2 compound and TEM images confirm the nanocrystalline nature of the title compound consisting of 50nm particle size. Cyclic voltametry and impedance spectral studies demonstrate the excellent reversibility and structural stability of LiCo1/3Ni1/3Mn1/3O2 cathode. Upon cycling, LiCo1/3Ni1/3Mn1/3O2 cathode delivered a capacity as high as 162 mAh/g with a capacity retention of 99% up to 30 cycles.

• 出版日期2011-10