Volume 31 Issue 5
Nov 2017
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XU Cong, SUN Fei, YANG Wen-Ge. High Pressure Effect on the Structure and Ionic Conductivity in Layered Cobaltite LiCoO2[J]. Chinese Journal of High Pressure Physics, 2017, 31(5): 529-534. doi: 10.11858/gywlxb.2017.05.004
Citation: XU Cong, SUN Fei, YANG Wen-Ge. High Pressure Effect on the Structure and Ionic Conductivity in Layered Cobaltite LiCoO2[J]. Chinese Journal of High Pressure Physics, 2017, 31(5): 529-534. doi: 10.11858/gywlxb.2017.05.004

High Pressure Effect on the Structure and Ionic Conductivity in Layered Cobaltite LiCoO2

doi: 10.11858/gywlxb.2017.05.004
  • Received Date: 29 Mar 2017
  • Rev Recd Date: 19 Apr 2017
  • The high pressure effect on layered lithium cobaltite oxides (LiCoO2) was investigated using synchrotron X-ray diffraction (XRD) up to 20.3 GPa.In this pressure range, no structural transition was observed and the crystal structure of LiCoO2 keeps stable; therefore, the compressibility of the parameter c was 4.5 times that of the parameter a, exhibiting a larger anisotropic compression; the isothermal equation of the state of LiCoO2 was fitted using the second orders Birch-Murnagha of state.Moreover, the ionic conductivity of LiCoO2 was measured by electrochemical impedance spectroscopy up to 16.8 GPa.The results of the high pressure impedance spectroscopy demonstrated that the Li ionic conductivity decreased rapidly with the increase of pressure.This research provided deep insight into the complex relationship of crystal structure with Li ionic conductivity in LiCoO2.

     

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