Synthesis and Electrochemical Characterization of Li₂MnSiO₄ with Different Crystal Structure as Cathode Material in Lithium Rechargeable Batteries

Joongpyo Shim, Sora Won, Gyungse Park, Ho-Jung Sun

Department of Chemistry, Kunsan National University, Gunsan, Jeonbuk, 573-701 Korea.
Department of Material Science & Engineering, Kunsan National University, Gunsan, Jeonbuk, 573-701 Korea.
Department of Nano & Chemical Engineering, Kunsan National University, Gunsan, Jeonbuk, 573-701 Korea.

DOI: 10.4236/ampc.2012.24B048                

Abstract

Li₂MnSiO₄ with different crystal structure was synthesized by solid state reaction method. Their crystal structure and electrochemical properties have been characterized by X-ray diffraction and charge-discharge test. The material prepared at 900^oC in N₂ atmosphere had γ-phase and its crystal structure changed to β-phase by post-heating at 400^oC in air after 900^oC sintering. In electrochemical measurement, two materials (γ- and β-phase) showed ~3 and ~45mAh/g, respectively. The different capacities of these two materials might be due to the change of crystal structure.

Keywords

Li₂MnSiO₄; Crystal Structure; Cathode; Lithium Rechargeable Battery

Conflicts of Interest

The authors declare no conflicts of interest.

References