We report an angle-resolved photoemission spectroscopy (ARPES) study of Li x CoO 2 single crystals which have a hole-doped CoO 2 triangular lattice. Similar to Na x CoO 2 , the Co 3d a 1g band crosses the Fermi level with strongly renormalized band dispersion while the Co 3d e ′ g bands are fully occupied in Li x CoO 2 (x=0.46 and 0.71). At x=0.46, the Fermi surface area is consistent with the bulk hole concentration indicating that the ARPES result represents the bulk electronic structure. On the other hand, at x=0.71, the Fermi surface area is larger than the expectation which can be associated to the inhomogeneous distribution of Li reported in the previous scanning tunneling microscopy study by Iwaya et al. [Phys. Rev. Lett. 111, 126104 (2013)]. However, the Co 3d peak is systematically shifted towards the Fermi level with hole doping excluding phase separation between hole rich and hole poor regions in the bulk. Therefore, the deviation of the Fermi surface area at x=0.71 can be attributed to hole redistribution at the surface avoiding polar catastrophe. The bulk Fermi surface of Co 3d a 1g is very robust around x=0.5 even in the topmost CoO 2 layer due to the absence of the polar catastrophe.