锂离子正极材料Li_(1.1)Ni_(0.35)Mn_(0.55)O_2的合成与性能研究  

Synthesis and performance study of Li_(1.1)Ni_(0.35)Mn_(0.55)O_2 cathode material of lithium-ion batteries

作　　者：杨尘 谢玉虎 刘大军 

机构地区：[1]合肥国轩高科动力能源有限公司,安徽合肥230011 [2]中国科学技术大学材料科学与工程系,安徽合肥230026

出　　处：《电源技术》2014年第6期1025-1029,共5页Chinese Journal of Power Sources

基　　金：国家高技术研究发展"863"计划(2012AA110407)

摘　　要：以Li2CO3、MnCO3及NiCO3·2 Ni(OH)2·4 H2O为原料,采用改进的固相法合成了Li1.1Ni0.35Mn0.55O2材料,考察了合成温度、烧结时间及合成方式对材料电化学性能的影响,通过X射线衍射(XRD)、扫描电子显微镜(SEM)对产物的结构及形貌进行了表征。结果表明,950℃下烧结8 h的Li1.1Ni0.35Mn0.55O2材料呈良好的层状晶体结构。在室温条件下,样品0.1 C首次放电比容量达到235.3 mAh/g,1 C放电比容量达到181.6 mAh/g,表现出良好的电化学性能。Li1.1Ni0.35Mn0.55O2 was synthesized using Li2CO3, MnCO3 and NiCO3- 2 N i （OH）2- 4 H2O as raw materials by improved solid phase method, and the structure and morphology of prepared sample were characterized by X-ray diffraction（XRD） and scanning electron microscopy （SEM）. The results show that Li1.1Ni0.35Mn0.55O2 material sintered at 950 ℃ for 8 h exhibits well-defined layered crystal structure. The initial discharge specific capacity of the product at 0.1 C is 235.3 mAh/g at room temperature, reaching 181.6 mAh/g at 1 C, showing perfect electrochemical perfor- mance.

关 键 词：锂离子电池 固熔体正极材料 固相法 

分 类 号：TM912.9[电气工程—电力电子与电力传动]