Tailoring superstructure units for improved oxygen redox activity in Li-rich layered oxide battery's positive electrodes.

ABSTRACT: The high-voltage oxygen redox activity of Li-rich layered oxides enables additional capacity beyond conventional transition metal (TM) redox contributions and drives the development of positive electrode active materials in secondary Li-based batteries. However, Li-rich layered oxides often face voltage decay during battery operation. In particular, although Li-rich positive electrode active materials with a high nickel content demonstrate improved voltage stability, they suffer from poor discharge capacity. Here, via physicochemical and electrochemical measurements, we investigate the correlation between oxygen redox activity and superstructure units in Li-rich layered oxides, specifically the fractions of LiMn₆ and Ni⁴⁺-stabilized LiNiMn₅ within the TM la

SUBMITTER: Liu H 

PROVIDER: S-EPMC11573992 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature