Al, B, and F doped LiNi1/3Co1/3Mn1/3O2 as cathode material of lithium-ion batteries

作者：Ye Shangyun^*; Xia Yongyao; Zhang Pingwei; Qiao Zhiyu

来源：Journal of Solid State Electrochemistry, 2007, 11(6): 805-810.

DOI：10.1007/s10008-006-0226-8

• lithium-ion battery
• cathode materials
• doping
• layered structure

A series of the mixed transition metal compounds, Li[( Ni1/3Co1/3Mn1/3)(1-x-y)AlxBy] O2-zFz (x= 0, 0.02, y= 0, 0.02, z= 0, 0.02), were synthesized via coprecipitation followed by a high-temperature heat-treatment. XRD patterns revealed that this material has a typical alpha-NaFeO2 type layered structure with R3(-)m space group. Rietveld refinement explained that cation mixing within the Li(Ni1/3Co1/3Mn1/3) O-2 could be absolutely diminished by Al-doping. Al, B and F doped compounds showed both improved physical and electrochemical properties, high tap-density, and delivered a reversible capacity of 190 mAh/g with excellent capacity retention even when the electrodes were cycled between 3.0 and 4.7 V.

• 出版日期2007-6
• 单位中国科学技术大学; 复旦大学