A cyanate-functionalized polymer composite electrolyte with a self-healing gradient SEI affords ultra-thermally stable lithium batteries.

ABSTRACT: Solid-state electrolytes can significantly enhance the thermal stability of batteries and reduce the risk of thermal runaway. Polymer/ceramic composite electrolytes hold promise for addressing the solid/solid interface contact issues in solid-state batteries. However, high-temperature environments can exacerbate the interfacial phase separation of polymer/ceramics, hindering barrier lithium-ion transport and intensifying side reactions on the anode. To extend the working temperature up to 160 °C, a high-thermal-stability polymer electrolyte containing cyano and ester-urea groups was in situ polymerized with porous lithium iron phosphate (Li_1.3Al_0.3Ti_1.7(PO₄)₃). The cyano groups in PPEM suppress interfacial phase separation throu

SUBMITTER: Wang J 

PROVIDER: S-EPMC12423775 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature