Changes in electronic structure by Li ion deintercalation in LiCoO₂ from cobalt L-edge and oxygen K-edge XANES

Cobalt L-edge and oxygen K-edge X-ray Absorption Near Edge Structure (XANES) investigated change in electronic structure by electrochemical lithium ion de-intercalation in LiCoO₂. The Co L-edge XANES of Li_1-xCoO₂ did not show any chemical shift even at high x value. The oxygen K-edge XANES of Li_1-xCoO₂ indicated that the holes compensating the lithium ion de-intercalation are located primarily in the oxygen 2p states rather than in the Co 3d states.