摘要
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-αNaFeO2型层状结构、球状形貌,以0.1C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167.27 mAh/g。
LiNi0.5Mn0.45Al0.05O2 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.
出处
《电池》
CAS
CSCD
北大核心
2011年第2期79-81,共3页
Battery Bimonthly
基金
广西自然科学基金项目(桂科自0832256)
关键词
锂离子电池
正极材料
低温燃烧法
正交实验
Li-ion battery
cathode material
low-temperature combustion process
orthogonal experiment
