Synthesis and characterization of high-voltage cathode material LiNi_0.5Mn_1.5O₄ by one-step solid-state reaction

Abstract

LiNi_0.5Mn_1.5O₄ was prepared under various conditions by one-step solid-state reaction in air and its properties were investigated by X-ray diffractormetry (XRD), scanning electron microscopy (SEM) and electrochemical measurement. XRD patterns show that LiNi_0.5Mn_1.5O₄ synthesized under various conditions has cubic spinel structure. SEM images exhibit that the particle size increases with increasing calcination temperature and time. Electrochemical test shows that the LiNi_0.5Mn_1.5O₄ calcined at 700 °C for 24 h delivers up to 143 mA · h/g, and the capacity retains 132 mA · h/g after 30 cycles.

Keywords

lithium ion batteries / cathode material / LiNi_0.5Mn_1.5O₄ / solid-state reaction

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