球磨时间对球磨-喷雾干燥法制备LiNi_(0.8)Co_(0.1)Mn_(0.1)O_2的影响  

Effect of milling time on LiNi_(0.8)Co_(0.1)Mn_(0.1)O_2 prepared via milling-spray drying-solid state reaction

作　　者：黄榕荣 杨洋 苏静[1,2,3] 龙云飞 文衍宣[1,2,3,4] HUANG Rong-rong;YANG Yang;SU Jing;LONG Yun-fei;WEN Yan-xuan(School of Chemistry of and Chemical Engineering, Guangxi University, Nanning Guangxi 530004, China;Guangxi Novel Battery Materials Research Center of Engineering Technology, Nanning Guangxi 530004, China;Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related Technology, Nanning Guangxi 530004, China;Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials, Guangxi University, Nanning Guangxi 530004, China)

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]广西新型电池材料工程技术研究中心,广西南宁530004 [3]广西高校新能源材料及相关技术重点实验室,广西南宁530004 [4]广西有色金属及特色材料加工重点实验室,广西南宁530004

出　　处：《电源技术》2019年第5期742-744,757,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金(51564002)

摘　　要：采用球磨-喷雾干燥-固相反应法合成了锂离子电池正极材料LiNi_(0.8)Co_(0.1)Mn_(0.1)O_2,用X射线衍射(XRD)、扫描电镜(SEM)、循环伏安(CV)、交流阻抗(EIS)和恒流充放电研究了原料球磨时间对合成材料结构、形貌和电化学性能影响。实验结果表明,合成材料的结晶度、颗粒球形度、放电比容量均随球磨时间增加呈先增大后减小。球磨时间为6 h时合成材料的1 C放电比容量为171 mAh/g,循环50次容量保持率为91%,具有较好的电化学性能。LiNi0.8Co0.1Mn0.1O2 was prepared by a milling-spray drying-solid state reaction process. The effects of milling time on the structure, morphology and the electrochemical performance of the prepared LiNi0.8Co0.1Mn0.1O2 were investigated by X-ray diffraction, SEM, CV, EIS analysis and charge-discharge test. The crystallinity, sphericity and discharge capacity of the obtained materials were first increased and then decreased with the increase of the milling time. The sample prepared with the milling time of 6 hours delivers a discharge specific capacity of 171 mAh/g at 1 C with a capacity retention of 91%, exhibiting good electrochemical performance.

关 键 词：锂离子电池 正极材料 LiNi0.8Co0.1Mn0.1O2 

分 类 号：TM912.9[电气工程—电力电子与电力传动]