Delithiation
Delithiation refers to the removal of lithium ions from a lithium-containing host material, typically through electrochemical oxidation during charging in lithium-ion batteries. The process leaves vacancies in the host lattice and increases the oxidation state of transition metal ions, releasing electrons to the external circuit.
In practice, delithiation occurs in materials such as layered LiMO2 (M = Co, Ni, Mn) and olivine LiFePO4.
Delithiation affects crystal structure and properties. It may cause lattice expansion or contraction, phase transitions, and
In energy storage, delithiation is essential for charging a Li-ion cell; the extent of delithiation determines