采用高温固相法制备样品Lic12Ni0.8Mn0.1Co0.1O2,采用XRD (X-ray diffraction)、SEM(Scanning electron microscope)、CV (Cycle voltammograms)和充放电循环等测试分析了材料的物理化学性质及电化学性能.RD分析表明在合成温度为800℃时,所合成的产物为α-NaFeO2型的层状结构;SEM分析表明在合成温度为800℃时,产物为微小晶粒团聚成的球形颗粒.在40 mA/g和2.5～4.3V的电压范围内,其首次放电比容量为184.1 mAh/g,首次放电效率为85.9％.随着充放电次数的增多,材料的不可逆放电容量逐步减小,循环稳定性增强.循环20周后放电比容量仍能达到171.7 mAh/g,容量保持率为93.260％.测试结果表明,800℃合成的正极材料Li1.12Ni0.8Mn0.1Co0.1O2具有较高的放电比容量和优异的电化学稳定性.
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