In-situ solvent-free preparation of MOF/polymer composite electrolytes with highly dispersed and defected MOF nanoparticles for lithium-metal batteries

Nanofiller/polymer composite electrolytes have been regarded as promising candidates for all-solid-state lithium-metal batteries. However, well-dispersion of nanofillers in polymer composite electrolytes is still a great challenge. Herein, we report an in-situ solvent-free processable method to the MOF/polymer composite electrolyte with highly dispersed and defected MOF nanoparticles. The high MOF dispersion without aggregation not only suggests the uniform composite structure with high utilization of MOF nanofillers but also induces the formation of continuous and uniform Li + transport paths. The defected MOF structure is favorable to adsorb anions and promote Li + transportation. As a result, Such MOF/polymer electrolyte demonstrates enhanced electrochemical performance and the assembled LiFePO 4 /Li full cells also exhibit both the excellent rate capability and cycling stability. This study proposes a simplified and efficient methodology for the highly dispersed MOF/polymer composite electrolytes for high performance solid-state batteries.