Local charge homogenization strategy enables ultra-high voltage tolerance of polyether electrolytes for 4.7 V lithium metal batteries.

ABSTRACT: In-situ fabricated polyether electrolytes have been regarded as one of the most promising solid electrolyte systems. Nevertheless, they cannot match high-voltage cathodes over 4.3 V due to their poor oxidative stability. Herein, we propose an effective local charge homogenization strategy based on the triglycidyl isocyanurate (TGIC) crosslinker, achieving ultra-high-voltage electrochemical stability of polyether electrolytes (viz. PTIDOL) at cutoff voltages up to 4.7 V. The introduction of TGIC optimizes the Li⁺ solvation environment, thereby homogenizing the charge distribution at ether oxygen (EO) sites, resulting in significantly enhanced oxidative stability of the polyether main chain. Consequently, the Li|PTIDOL|LiNi_0.6Co_0.2Mn_0.2O

SUBMITTER: Wu Y 

PROVIDER: S-EPMC11737385 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature