UiO-66-NH₂ MOF-Integrated Cellulose Scaffold for High-Performance Solid Polymer Electrolytes

With the rapid expansion of the energy storage system (ESS) industry, developing high-safety solid-state batteries has become paramount. However, conventional solid polymer electrolytes (SPEs) suffer from poor room-temperature ionic conductivity and severe lithium dendrite growth. To address these critical bottlenecks, a novel multi-functional composite solid polymer electrolyte architecture has been developed, utilizing a cellulose scaffold integrated with in-situ grown amine-functionalized metal-organic frameworks (UiO-66-NH₂). In this design, the highly porous MOF architecture introduces continuous, well-defined nano-channels that drastically accelerate lithium-ion (Li⁺) transport kinetics. Simultaneously, the functional –NH₂ groups within the MOF pores effectively anchor TFSI⁻ anions via strategic Lewis acid-base interactions, thereby mitigating anion concentration polarization and regulating a highly uniform Li⁺ flux to fundamentally suppress dendrite proliferation. Furthermore, this robust inorganic-organic framework significantly reinforces the mechanical integrity of the electrolyte, while an in-situ thermal curing process ensures intimately seamless, low-resistance interfacial contact with the electrodes. Consequently, this synergistic solid electrolyte strategy offers a comprehensive paradigm for achieving both superior electrochemical performance and exceptional battery safety.