Structurally robust lithium-rich layered oxides for high-energy and long-lasting cathodes.

ABSTRACT: O2-type lithium-rich layered oxides, known for mitigating irreversible transition metal migration and voltage decay, provide suitable framework for exploring the inherent properties of oxygen redox. Here, we present a series of O2-type lithium-rich layered oxides exhibiting minimal structural disordering and stable voltage retention even with high anionic redox participation based on the nominal composition. Notably, we observe a distinct asymmetric lattice breathing phenomenon within the layered framework driven by excessive oxygen redox, which includes substantial particle-level mechanical stress and the microcracks formation during cycling. This chemo-mechanical degradation can be effectively mitigated by balancing the anionic and cationic redox capabilities, securing both high discharg

SUBMITTER: Jang HY 

PROVIDER: S-EPMC10861561 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature