LiFePO₄-coated LiNi_0.6Co_0.2Mn_0.2O₂ for lithium-ion batteries with enhanced cycling performance at elevated temperatures and high voltages.

ABSTRACT: LiNi_0.6Co_0.2Mn_0.2O₂ (NCM622) is a highly promising cathode material owing to its high capacity; however, it is characterized by inferior cycling performance and safety problems. We report a novel strategy to improve electrochemical characteristics and safety issues of NCM622 by coating it with LiFePO₄ (LFP). Although having a lower capacity, LFP is a safe and long-cycle cathode material; it is more chemically and thermally stable than NCM622 when exposed to common electrolytes. The LFP-coated NCM622 (NCM@LFP) showed similar rate performance and cycling performance at room temperature compared with the pristine NCM622 under the same conditions. However, significant differences between the NCM622 and NCM@LFP began to emerge at high tempe

SUBMITTER: You L 

PROVIDER: S-EPMC9057239 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature