无机材料学报2012，Vol.27Issue(3)：258-264,7.DOI:10.3724/SP.J.1077.2012.00258
高致密球形LiNi0.8Co0.1Mn0.1O2颗粒的合成及性能研究
Synthesis and Characterization of Spherical LiNi0.8Co0.1Mn0.1O2 Particles with a High Tap-density
摘要
Abstract
Spherical Ni0.8Co0.1Mn0.1(OH)2 precursors with a high tap-density and a narrow size-distribution were synthesized via coprecipitation using NaOH and NH3·H2O as the precipitation and complexing agents. SphericalLiNi0.8Co0.1Mn0.1O2 particles were then prepared by sintering the mixture of this precursor and LiOH·H2O. Theprepared materials were characterized by XRD, SEM, TEM, TGA/DSC and galvanostatically charge/discharge tests. The results indicate that secondary spherulites of the precursors are formed by aggregation of crystals but not by elongated crystals. The reaction time shows a significant effect on the morphology, size-distribution and tap-density of the precursor. The LiNi0.8Co0.1Mn0.1O2 powders calcined under 750°C for 16 h exhibit a spherical morphology with the highest tap-density (2.98 g/cm3) and the largest initial discharge capacity (202.4 mAh/g). More than 92.3% of the capacity is retained after 40 cycles. In addition, the cell delivers a discharge capacity of 174.1 mAh/g at 3C rate.关键词
球形颗粒/共沉淀/LiNi0.8Co0.1Mn0.1O2/锂离子电池Key words
spherical particle/ coprecipitation/ LiNi0.8Co0.1Mn0.1O2 Li-ion batteries分类
化学化工引用本文复制引用
陆雷,钟伟攀,杨晖..高致密球形LiNi0.8Co0.1Mn0.1O2颗粒的合成及性能研究[J].无机材料学报,2012,27(3):258-264,7.基金项目
国家自然科学基金(20803035) （20803035）
