锂离子电池正极材料Li_(1.2)Ni_(0.16)Co_(0.12)Mn_(0.52)O_2的溶胶-凝胶制备与电化学性能研究  

Sol-gel Synthesis and Electrochemical Properties of Li_(1.2)Ni_(0.16)Co_(0.12)Mn_(0.52)O_2 Cathode Material for Lithium Ion Batteries

作　　者：魏俊超 赵陈浩[2] 

机构地区：[1]山东省章丘市第四中学,山东章丘250200 [2]龙岩学院化学与材料学院,福建龙岩364012

出　　处：《山东化工》2014年第6期1-3,共3页Shandong Chemical Industry

摘　　要：以柠檬酸作为螫合剂，通过简单的溶胶-凝胶法制备了富锂层状氧化物Li1．2Ni0．16Co0．12Mn0．52O2纳米颗粒。X射线衍射（xRD）和透射电子显微镜（TEM）结果显示：尺寸在100—300nm的产物具有良好的六方层状结构。作为锂离子电池正极活性物质。在0．1C电流密度和2．0-4．7V电压区间，Li1．2Ni0．16Co0．12Mn0．52O2电极的初始放电比容量为245．9mAh·g-1；在0．5C的电流密度下。经过60次循环容量保持率达到97．3％；同时在5C这样高的电流密度下，放电容量也能稳定在115．8mAh·g-1。Lithium- rich layered oxide Li1.2Ni0.16Co0.12Mn0.52O2 nanopartieles have been prepared by a simple solgel route using citric acid as chelating agent. X- ray diffraction （XRD） and transmission electron microscope （TEM） results show that, the as - prepared nanoparticlcs have an average size of 100 - 300 nm and acquire hexagonal layered structures. As lithium ion battery cathodes, the resulting nanoparticles have an initial discharge capacity of 245.9 mAh · g -1 at 0.1C within 2.0 - 4.7 V. At current density of 0.5C, the nanoparticles have capacity retention of 97.3% after 60 cycles. Furthermore, at a high density of 5C, the nanoparticles also deliver a stable discharge capacity of 115.8 mAh · g -1.

关 键 词：溶胶-凝胶合成 富锂层状氧化物Li1 2Ni0 16Co0 12Mn0 52O2 高性能 锂离子电池 

分 类 号：O646[理学—物理化学] TM912.9[理学—化学]