Work

Sustainable LiCoO 2 by collective glide of CoO 6 slabs upon charge/discharge

Year: 2022

Type: article

Abstract: Significance Traditional views indicate that the well-known layered LiCoO 2 cathode delivers a typical solid-solution reaction upon delithiation. The problem is that “solid solution” is a vague concept, and the phase transition remains ambiguous. Here, we reveal a mechanism with the collective and quasi-continuous glide of CoO 6 slabs in layered LiCoO 2 through combining in situ XRD and ex situ STEM characterizations. Such a delithiation mechanism does not involve the nucleation-and-growth-type delithiation process and represents a completely different manner from the conventional two-phase or solid solution–phase transition processes. The lessons provide a different insight into understanding the working mechanism of layered oxide materials.

Source: Proceedings of the National Academy of Sciences

DOI: 10.1073/pnas.2120060119

Authors: Shuai Li, Yang Sun, Ang Gao, Qinghua Zhang, Xueyi Lu, Xia Lu

Institutions: Sun Yat-sen University, Chinese Academy of Sciences, Institute of Physics

Language: English

Topic: Advancements in Battery Materials

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Funders: National Natural Science Foundation of China, Basic and Applied Basic Research Foundation of Guangdong Province

Awards: G3223607304, G714734350