单晶型LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)正极材料的制备及性能对比  

Preparation and performance comparison of single crystal LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) cathode materials

作　　者：饶先发[1,2] 李宝宝 楼轶韬 黄锦朝 吴成威 邱玉萍 况磊 施宣波 钟盛文 RAO Xianfa;LI Baobao;LOU Yitao;HUANG Jinchao;WU Chengwei;QIU Yuping;KUANG Lei;SHI Xuanbo;ZHONG Shengwen(Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China;School of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China;Jiangxi Key Laboratory of Power Battery and Materials,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China)

机构地区：[1]江西理工大学材料冶金化学学部,江西赣州341000 [2]江西理工大学资源与环境工程学院,江西赣州341000 [3]江西理工大学江西省动力电池及其材料重点实验室,江西赣州341000

出　　处：《有色金属科学与工程》2021年第4期42-50,共9页Nonferrous Metals Science and Engineering

基　　金：国家自然科学基金资助项目(51874151,21762019);江西省教育厅科技项目(GJJ190427);赣州市创新领军人才计划项目(赣市科发[2020]60号)。

摘　　要：基于高镍三元正极材料容量和成本等方面的优异性,通过熔盐法结合高温固相法进行梯度煅烧,成功制备出了具有大尺寸单晶颗粒状的高镍LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)材料,并与传统固相反应煅烧制备的材料进行比对,通过XRD衍射分析其结构特征,反映阳离子混排程度。依托扫描电子显微镜和透射电子显微镜,表征其表面形貌和晶体特征,研究表明:在经过循环伏安测试后,在高倍率测试条件下,循环稳定性和容量保有量的优势明显,契合锂离子电池近些年在快速发展过程中所面临的安全稳定的条件。这种采用熔盐法制备的NCM-811材料为制备微米级单晶型的正极材料提供了新的思路。On the basis of the superiority in capacity and cost of high nickel ternary cathode materials,the high nickel LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) materials with large size single crystal particles were prepared by gradient calcination and high temperature solid-state method.The newly-manufactured material is compared with the materials prepared by traditional solid state reaction calcination.XRD diffraction shows the structural characteristics,reflecting the mixed discharge degree of cations.Scanning electron microscope and transmission electron microscope were used to characterize the surface morphology and crystal characteristics.The results of cyclic voltammetry high magnification testing testify the obvious advantages of cyclic stability and capacity retention,which is in line with the safe and stable conditions faced by lithium-ion battery in the rapid development process in recent years.The NCM-811 material prepared by molten salt method provides a new idea for preparing micron-sized single crystal cathode materials.

关 键 词：锂离子电池 LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) 熔盐法 电化学性能 

分 类 号：TM912[电气工程—电力电子与电力传动] TG146[一般工业技术—材料科学与工程]