LITHIUM ORDERING IN CHEMICALLY DELITHIATED LixCoO2

金属学报(英文版), 2006, 19(3): 197-202.

^1, , ^2, , ^3, , ^4, , ^5,

1.Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, China

2.Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, China

3.Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, The Chinese Academy of Sciences, Beijing 100080, China

4.Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, The Chinese Academy of Sciences, Beijing 100080, China

5.Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, The Chinese Academy of Sciences, Beijing 100080, China

LITHIUM ORDERING IN CHEMICALLY DELITHIATED LixCoO2

X. Liu ^1, , W.H. Tian ^2, , H.X. Yang ^3, , Y. G. Shi ^4, , J. Q. Li ^5,

1.Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, China

2.Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, China

3.Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, The Chinese Academy of Sciences, Beijing 100080, China

4.Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, The Chinese Academy of Sciences, Beijing 100080, China

5.Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, The Chinese Academy of Sciences, Beijing 100080, China

Keywords： LixCoO2

Chemical delithiated LixCoO2 (x=1, 0.7, 0.66 and 0.57) has been synthesized by using a strong oxidant, NaS2O8. The structure investigations indicate that all the samples remain with hexagonal cells, which have expansion of c axis during Li extraction. Transmission electron microscopy (TEM)observations revealed the presence of superstructures arising from intercalated Li-ordering corresponding to first-principle calculations. The measurements of the physical properties are also influenced by Li concentration.

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