摘要
采用共沉淀法制备Ni0.25Mn0.75(OH)2,通过不同的烧结制度在高温下合成LiNi0.5Mn1.5O4,并通过XRD和SEM对样品进行表征。研究结果表明:两段法和三段法合成的LiNi0.5Mn1.5O4均具有良好的尖晶石结构和规则的几何外形。其首次放电容量分别为130和139 mA.h/g。80次循环后容量保持率分别为96.5%和97.5%。5C放电比容量分别为93和115 mA.h/g;两段法烧结样品的极化程度要大于三段法烧结样品的极化程度。
LiNi0.5Mn1.5O4 was synthesized by different sinter methods at high temperature with Ni0.25Mn0.75（OH）2,which was synthesized by co-deposition.The sample was characterized by XRD and SEM.The results indicate that LiNi0.5Mn1.5O4 synthesized by two-step and three-step have pure spinel structure and regular geometrical shape.The first-cycle discharge capacities are 130 and 139 mA.h/g,and the discharge capacities at 5C are 93 and 120 mA.h/g,respectively.The capacity retentions are 96.5% and 97.5% after 80 cycles,respectively.The polarization of two-step prepared sample is larger than that of three-step prepared sample.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第11期4248-4252,共5页
Journal of Central South University:Science and Technology
基金
江苏省自然科学基金资助项目(BK2011530)
江苏大学高级人才启动基金资助项目(10JDG041)
作者简介
通信作者：刘云建（1981-），男，江苏溧阳人，博士后，讲师，从事有色金属冶金和新能源材料及电化学研究；电话：13505282025；E—mail：lyjian122331@yahoo．com.cn
