Anisotropic Electrical Conductivity in LiCoO2 Single Crystal

Anisotropic temperature dependence of the electrical resistivity in LiCoO2 has been first clarified using chemically and structurally characterized single crystal specimens. The resistivities both perpendicular and parallel to the c-axis show semiconductive behavior with large anisotropy of ρc/ρa≈500 at 300 K. The temperature dependence of in-plane resistivity suggested a variable range hopping in the two-dimensional system.