以Ni(NO3)2·6H2O、Al(NO3)3·9H2O、LiNO3和CO(NH2)2为原料,通过低温燃烧法在空气中合成了锂离子电池正极材料LiNi1-xAlxO2(x=0.05～0.30),用XRD研究了合成材料的物相和结构,研究了掺铝量、合成温度、合成时间以及锂过量对合成产物结构的影响.实验结果表明,掺铝有利于形成和稳定α-NaFeO2型层状有序结构,有利于降低镍酸锂的合成难度,通过掺杂改性,可以在空气中合成具有良好层状结构的镍酸锂基正极材料.采用低温燃烧法在空气中合成LiNi1-xAlxO2(x=0.05～0.30)的最佳条件为:合成温度750℃,合成时间8h.
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