A Spray-drying Method to Synthesis LiMn_(1.5)Ni_(0.5)O_4 and Its Electrochemical Characteristics as a Cathode Material

摘要

Spinel LiMn_(1.5)Ni_(0.5)O_4 materials were prepared via a spray-drying method. The materials were sub-micro size particles, and the particles had a well-defined cubic spinel structure. For Ii-ion batteries, the electrochemical property of LiMn_(1.5)Ni_(0.5)O_4 were characterized by cycling the cells between 3.20 V and 4.95 V at a specific current density. The spinel LiMn_(1.5)Ni_(0.5)O_4 delivered an initial discharge capacity of 132 mAh/g and exhibited good cycle stability at room temperature. Cycling at high voltage range (4.50 ～ 4.95 V) and low voltage range (3.20 ～ 4.50 V), the discharge capacities of materials were about 100 mAh/g and 25 mAh/g respectively, and both exhibited good cycle ability. However, at high temperature, the materials showed different electrochemical characteristics.