LiNi0.5 Mn0.45 Al0.05 O2 was synthesized by low-temperature combustion process using LiNO3, Ni ( NO3 )2 · 6H2O, Mn( NO3)2, Al(NO3)3 ·9H2O and urea as raw materials. The synthesis condition was studied by orthogonal experiment, the optimum conditions were: to ignite the raw materials at 600 ℃, reheating the combustion product at 750 ℃ for 12 h, with 10％ excess Li in the raw materials. The results of XRD, SEM and charge-discharge test showed that the product synthesized under such condition had α- NaFeO2 layered structure, spherical particles, when charged-discharged at 0.1 C in 2.5 ～ 4.6 V, the specific discharge capacity was the highest (183.85 mAh/g) in the 2nd cycle and remained 167.27 mAh/g in the 50 th cycle.%以LiNO3、Ni(NO3)2·6H2O、Mn(NO3)2、Al(NO3)3·9H2O及尿素为原料,用低温燃烧法合成了LiNi0.5Mn0.45Al0.05O2.通过正交实验对合成条件进行了优化,最佳条件为:在600℃点火使原料发生自蔓延燃烧反应,将燃烧产物在750℃回火处理12 h,原料中锂过量10%.XRD、SEM及充放电测试结果表明:此条件下所得产物具有c-NaFeO2型层状结构、球状形貌,以0.1 C在2.5～4.6 V充放电,放电比容量在第2次循环时最高,为183.85 mAh/g,第50次循环时仍有167.27mAh/g.
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