Preventing the Distortion of CoO₆ Octahedra of LiCoO₂ at High-Voltage Operation of Lithium-Ion Battery: An Organic Surface Reinforcement.

ABSTRACT: Lithium cobalt oxide (LiCoO₂, LCO) has been widely used in electronic markets due to its high energy density and wide voltage range applications. Recently, high-voltage (HV, >4.5 V) operation has been required to obey the requirements of high energy density and cycle life in several applications such as electric vehicles and energy storage. However, the HV operation causes structure instability due to the over de-lithiation of LCO, as well as decomposing common carbonate solvents, thereby incurring the decay of battery performance. Moreover, a distortion of the CoO₆ octahedra of LCO during de-lithiation induces a rehybridization of the Co 3d and O 2p orbitals. According to above reasons, decreasing the Co-O covalent bond promptly triggers high risks that significantly

SUBMITTER: Wang FM 

PROVIDER: S-EPMC10181088 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature