中文摘要：

通过加热回流-喷雾干燥高温煅烧三步法制备了包覆碳的纯相Li2MnSiO4锂离子电池正极材料，研究了回流时间对材料性能的影响。通过XRD、SEM、TEM和电化学测试对Li2MnSiO4材料的结构、形貌及电化学性能进行了测试和表征。结果表明，当电流密度为30mA／g时，所制备的材料首次放电容量达189．1mAh／g；当电流密度为300mA／g时，首次放电容量达132．9mAh／g，经过40次循环，保持了首次放电容量的55．6％。

英文摘要：

Phase-pure carbon-coated Li2MnSiO4 cathode material was prepared through a refluxing-spray drying-calcining process. Xray diffraction （XRD）, scanning electron microscopy （SEM）, transmission electron micro scopy（TEM） and electrochemical tests were employed to characterize the structure, appearance and electrochemical performance of Li2MnSiO4 . The as-obtained Li2MnSiO4 cathode material exhibited the initial discharge capacity of 189.1mAh/g at the current density of 30mA/g. When tested at the current density of 300mA/g the initial discharge capacity was 132.9mAh/g and retained 55.6% after 40 cycles.