物理化学学报Issue(5)：905-912,8.DOI:10.3866/PKU.WHXB201503091
高倍率性能锂离子电池Li[Ni1/3Co1/3Mn1/3]O2正极材料的制备及其电化学性能
Preparation and Electrochemical Performance of Li[Ni1/3Co1/3Mn1/3]O2 Cathode Material for High-Rate Lithium-Ion Batteries
摘要
Abstract
A spherical Li[Ni1/3Co1/3Mn1/3]O2 cathode material for lithium-ion batteries was synthesized using a combination of modified carbonate co-precipitation and solid-state methods. The as-prepared material was analyzed using X-ray diffractometry (XRD), scanning electron microscopy (SEM), galvanostatic charge-discharge tests, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The results indicate that the material synthesized using this new method has a wel-ordered layered structure,α-NaFeO2 [space group:R3m (166)], a spherical morphology, and an average particle size of 157 nm. Electrochemical measurements showed that the material has a good rate capability and long-term cycling performance. At a current density of 0.1C (1.0C=180 mA∙g-1) in the voltage range 2.7-4.3 V, the initial discharge capacity was 156.4 mAh∙g-1 and the coulombic efficiency was 81.9%. At 0.5C, 5C, and 20C, the specific capacities of the material were 136.9, 111.3, and 81.3 mAh∙g-1, respectively. After 100 cycles at 1C, the material retained 92.9%of its initial capacity;this is higher than those of materials prepared using conventional carbonate co-precipitation (87.0%).关键词
锂离子电池/正极材料/LiNi1/3Co1/3Mn1/3O2/倍率性能/改进共沉淀法Key words
Lithium-ion battery/Cathode material/Li[Ni1/3Co1/3Mn1/3]O2/Rate capacity/Modified carbonate co-precipitation分类
化学化工引用本文复制引用
张继斌,滑纬博,郑卓,刘文元,郭孝东,钟本和..高倍率性能锂离子电池Li[Ni1/3Co1/3Mn1/3]O2正极材料的制备及其电化学性能[J].物理化学学报,2015,(5):905-912,8.基金项目
The project was supported by the Science and Technology Pillar Program of Sichuan Province, China (2014GZ0077), Sichuan University Funds for Young Scientists, China (2011SCU11081), and Research Fund for the Doctoral Program of Higher Education, the Ministry of Education, China (20120181120103).四川省科技支撑计划(2014GZ0077),四川大学青年基金(2011SCU11081)和教育部高校博士学科点科研基金(20120181120103)资助项目 （2014GZ0077）
