Synthesis and electrochemical properties of 5 V spinel LiNi 0.5Mn 1.5O 4 cathode materials prepared by ultrasonic spray pyrolysis method

Abstract

The spinel LiNi 0.5Mn 1.5O 4 powders with high crystallinity and well-developed octahedral morphology were synthesized by a ultrasonic spray pyrolysis method using citric acid as a polymeric agents. The LiNi 0.5Mn 1.5O 4 powders were characterized by X-ray diffraction, scanning electron microscopy, and electrochemical testing. The LiNi 0.5Mn 1.5O 4 material delivers a discharge capacity of more than 138 mAh g −1 with excellent capacity retention of more than 97% after 50 cycles even at 55 °C.