Preparation and properties of LiNi0.5Mn0.5O2 thin films by spin-coating for lithium micro-batteries

LiNi0.5Mn0.5O2 thin films were successfully prepared by a sol–gel spin-coating method. SEM results revealed that the annealed films have a relatively smooth and dense surfaces, along with small grains with homogeneous distribution. The crystallinity and the grain size of thin films increase as the annealing temperature enhanced. The initial discharge capacity enhances from 13 to 46 μAh/cm2μm when the drying temperature increases from 700 to 800 °C.