Synthesis of nano-sized LiNi0.8Co0.2O2via a reverse-microemulsion route

Abstract

Nano-sized LiNi_0.8Co_0.2O₂ powders utilized in lithium-ion secondary batteries have successfully been synthesized using a newly developed reverse-microemulsion process. This route not only reduces the essential calcination time to 2 h, but also effectively decreases the average particle size of LiNi_0.8Co_0.2O₂ powders to the order of nanometers. In addition, the extent of capacity degradation of LiNi_0.8Co_0.2O₂ at room temperature is markedly reduced.