Electrospinning Machine | MOF-lonic Liquid Structured Polymer Electrolytes with Multi- Channel lon Transport Pathways for Wide-Temperature Solid- State Lithium Batteries

Challenge: Ionic liquid-enhanced composite polymer electrolytes (CPEs) have advantages in interfacial compatibility and processability, making them promising candidates for next-generation solid-state lithium metal batteries. However, their application over a wide temperature range has been limited by the inherent contradiction between mechanical strength and ionic conductivity. 

Method: Professor Chen Shimou and others from Beijing University of Chemical Technology designed an innovative poly(ethylene oxide) (PEO)-based CPE architecture. This architecture utilizes amine-functionalized metal-organic framework (MOF) nanoparticles encapsulated and immobilized within a PEO-filled electrospun membrane to establish stable multi-channel ion pathways over a wide temperature range. 

Innovation 1: The functionalized MOF enables rapid Li+ hopping at the interface, and the MOF-confined IL promotes bulk ion transport. This multi-path mechanism ensures high Li+ conductivity and structural stability within a range of −10 to 120 °C. 

Innovation 2: The LiFePO4||Li battery exhibits excellent cyclability, maintaining 96.8% capacity after 1000 cycles at 3C, and operates stably for over 400 cycles at both −10 °C and 120 °C. 

https://doi.org/10.1002/adma.202512360