Rapid Thermal Shutdown of Deep-Eutectic-Polymer Electrolyte Enabling Overheating Self-Protection of Lithium Metal Batteries.

ABSTRACT: Safety concerns and uncontrollable dendrite growths have severely impeded the advancement of lithium-metal batteries. Herein, a safe deep-eutectic-polymer electrolyte with built-in thermal shutdown capability is proposed by utilizing hydrophobic association of methylcellulose within a novel deep-eutectic-solvent. Specifically, at elevated temperatures, methylcellulose chains aggregate to form dense polymer networks due to hydrophobic association and break the solvation structure equilibrium inside the deep-eutectic system through encapsulating Li⁺ in polymer matrix, leading to quick solidification of the electrolyte. The solidified electrolyte obstructs Li⁺ transports and terminates electrochemical processes, protecting LMBs from unstoppable exothermic chain reactions

SUBMITTER: Zhang Z 

PROVIDER: S-EPMC11672307 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature