采用超声喷雾热分解工艺合成了球形锂离子电池正极材料LiNi1/3Co1/3Mn1/3O2. 考察了不同前驱溶液对粉体形貌的影响, 用喷雾热分解过程机理分析了形貌差异的原因, 另外研究了不同的后处理烧结时间对样品电化学性能的影响. 试验结果表明, 采用硝酸盐溶液经喷雾热分解制备的前驱体在900℃烧结6h可以得到电化学性能优良的正极材料, 在3.0～4.3V电压区间里, 首次放电容量达157.7mAh/g, 40次循环后容量仍保持146.6 mAh·g-1.
Spherical morphology LiNi1/3Co1/3Mn1/3O2 as a cathode aterial of lithium ion batteries was successfully synthesized by an ultrasonic spray pyrolysis method. The effects of different precursor solution on the morphology of particles were investigated. The reasons of morphology difference were analysed by using the process mechanism of spray pyrolysis. In addition, the impacts of various post reatment sintering time on electrochemical performances of the samples were characterized. Experimental results show that the cathode material synthesized by ultrasonic spray pyrolysis using nitrate as precursor solution, followed by sintering at 900℃ for 6h, exhibits excellent electrochemical properties. In the voltage range of 3.0--4.3V, initial discharge capacity of the sample is 157.7mAh · g-1 and its capacity retains 146.6mAh·g-1 after 40 cycles.
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