Enhanced Cycling Stability of NCM811 Cathodes at High C-Rates and Voltages via LiMTFSI-Based Polymer Coating.

ABSTRACT: Improving the cycling stability in Ni-rich LiNi_xCo_yMn_1-x-yO₂ (NCM) cathodes, particularly under high C-rates and elevated voltages, remains a significant challenge in lithium battery technology. A novel polymer coating based on lithium sulfonyl(trifluoromethane sulfonyl)imide methacrylate (LiMTFSI), a material commonly used in solid polymer electrolytes (SPEs), is applied to LiNi_0.8Co_0.1Mn_0.1O₂ (NCM811) cathodes. This coating improves electrochemical stability at high C-rates (2C and 4C) and voltages up to 4.5 V, compared to uncoated cathodes, enabling reduced charging times (e.g., 1 h at 1C to 15 min at 4C) while maintaining relatively enhanced cycling performance. Mechanistically, the coating helps su

SUBMITTER: Kim H 

PROVIDER: S-EPMC12306421 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature