Abstract: Under ultrasonic andusingthe additive LomarDas dispersant, the printing“ink”can be prepared with LiMn2O4, which was synthesized through a sol-gel method. Through an ink-jet printing process, thin film LiMn2O4 electrode with thickness of about 1.8 μm was fabricated successfully. XRD, TG-DTA, SEM, electrochemical impedance spectrum, CV, and charge/discharge tests were used to characterize the LiMn2O4 nano particles and LiMn2O4 thin film electrode. It was found that LiMn2O4 filmelectrode could be charge-discharged at relative high current rate and kept stable. At the current density of 100 μA·cm-2 (2C), the thin film LiMn2O4 electrode had an initial capacity of 109 mAh·g-1, after 54 cycles the discharge capacity remained 97.4%, as a value of 105 mAh·g-1. This good electrochemical behavior of LiMn2O4 thin filmelectrode was mainly due to the thin thickness of electrode and well-crystallized LiMn2O4 nano particles.

Key words: LiMn2O4 nano-particle, Ink-jet printing technique, Thin filmelectrode, Lithiumion battery