人工晶体学报2011，Vol.40Issue(1)：237-241,257,6.
焙烧温度对Li[Mn1/3Ni1/3CO1/3]O2结构及电化学性能影响
Effect of Calcining Temperature on the Structure and Electrochemical Performance of Li [ Mn1/3Ni1/3 Co1/3 ] O2
刘伶 1张乃庆 2孙克宁2
作者信息
- 1. 吉林化工学院化工与材料工程学院,吉林,132022
- 2. 哈尔滨工业大学基础与交叉科学研究院,哈尔滨,150001
- 折叠
摘要
Abstract
Li [ Mn1/3 Ni1/3Co1/3 ] O2 powder was prepared by carbonate co-precipitation method. The effects of precusor calcining temperature on the structure and electrochemical oxide compounds were studied under different annealing temperature. X-ray diffraction(XRD) revealed that the layered Li [ Mn1/3Ni1/3Co1/3 ] O2 can be synthesized at lower temperature of 800 ℃ with low cation mixing. SEM observations showed that the synthesized materials have spherical secondary particles of about 5 μm, made up of small nano-sized particles (200 nm). In the voltage range of 2.8-4.3 V, the maximum discharge specific capacity and the minimum capacity loss were obtained for the material synthesized at 800 ℃, which has the initial discharge capacity of 159.06 mAh·g-1, and 95.7％ of the initial capacity was retained after 50 chargedischarge cycling. Electrochemical impedance spectroscopy analysis indicated that the material synthesized at 800 ℃ have higher electrochemical activity.关键词
锂离子电池/Li[Mn1/3Ni1/3Co1/3]O2/碳酸盐共沉淀/比容量Key words
lithium-ion battery/ Li [ Mn1/3 Ni1/3 Co1/3 ]O2/ carbonate co-precipitation/ specific capacity分类
信息技术与安全科学引用本文复制引用
刘伶,张乃庆,孙克宁..焙烧温度对Li[Mn1/3Ni1/3CO1/3]O2结构及电化学性能影响[J].人工晶体学报,2011,40(1):237-241,257,6.
